- Kocaelia, Genus Kocaelia Fantini Sestini, 1990 † (BEYRICHITIDAE) (FOSSIL)
- kocapinarica, Graecoanatolica kocapinarica P. Radoman, 1973 - (HYDROBIIDAE)
- kochanskyae, Viviparus kochanskyae O. Mandic, Kurecic, T.A. Neubauer & M. Harzhauser † - (VIVIPARIDAE) (FOSSIL)
- kochetkovi, Khostalestes kochetkovi A.N. Suvorov, 2003 - (TRIGONOCHLAMYDIDAE)
- kochi, Iselica kochi A.M. Strong & L.G. Hertlein, 1939 - (AMATHINIDAE)
- kochi, Scutalus kochi (L. Pfeiffer, 1846) - (BULIMULIDAE)
- kochi, Calliostoma kochi P.M. Pallary, 1902 - (CALLIOSTOMATIDAE)
- kochi, Parvicardium kochi (C.G. Semper, 1861 †) - (CARDIIDAE) (FOSSIL)
- kochi, Rhinoclavis kochi (R.A. Philippi, 1848) - (CERITHIIDAE)
- kochi, Proclava kochi J.B.P.A. Lamarck, 1822 - syn of: Rhinoclavis kochi (R.A. Philippi, 1848) - (CERITHIIDAE)
- kochi, Rhinoclavis kochi R.A. Philippi, 1848 - syn of: Rhinoclavis kochi (R.A. Philippi, 1848) - (CERITHIIDAE)
- kochi, Constricta kochi (O. Boettger, 1877) † - (CLAUSILIIDAE) (FOSSIL)
- kochi, Ophiceras kochi (Griesbach 1880 †) - (DIENEROCERATIDAE) (FOSSIL)
- kochi, Anguispira kochi (C. Pfeiffer, 1821) - (DISCIDAE)
- kochi, Pseudomelampus kochi P.M. Pallary, 1900 - syn of: Pseudomelampus exiguus (R.T. Lowe, 1832) - (ELLOBIIDAE)
- kochi, Eulima kochi C.G. Semper, 1861 † - (EULIMIDAE) (FOSSIL)
- kochi, Planammatoceras kochi (Prinz, 1904 †) - (HAMMATOCERATIDAE) (FOSSIL)
- kochi, Dumortieria kochi Benecke, 1905 † - (HILDOCERATIDAE) (FOSSIL)
- kochi, Pernoceras kochi (Wedekind, 1908 †) - (KIRSOCERATIDAE) (FOSSIL)
- kochi, Limatula kochi Kirkland, 1996 † - (LIMIDAE) (FOSSIL)
- kochi, Undulotheca kochi Gorjanovic-Kramberger, 1923 † - (LYMNAEIDAE) (FOSSIL)
- kochi, Mangelia kochi P.M. Pallary, 1904 - syn of: Mangelia pallaryi (F. Nordsieck, 1977) - (MANGELIIDAE)
- kochi, Ecphora kochi Ward & Gilinsky, 1988 † - (MURICIDAE) (FOSSIL)
- kochi, Promyalina kochi Spath, 1930 † - (MYALINIDAE) (FOSSIL)
- kochi, Praeturbonitella kochi Heidelberger & Koch, 2005 † - (NERITOPSIDAE) (FOSSIL)
- kochi, Discophiceras kochi (Spath, 1930 †) - (OPHICERATIDAE) (FOSSIL)
- kochi, Costipelagiella kochi Peel, 1988 † - (PELAGIELLIDAE) (FOSSIL)
- kochi, Pyropsis kochi Kirkland, 1996 † - (PERISSITYIDAE) (FOSSIL)
- kochi, Planorbis kochi P.S. Pavlovic, 1927 † - (PLANORBIDAE) (FOSSIL)
- kochi, Hectoroceras kochi Spath, 1947 † - (POLYPTYCHITIDAE) (FOSSIL)
- kochi, Posidonia kochi (A. von Koenen, 1879 †) - (POSIDONIIDAE) (FOSSIL)
- kochi, Rhynchocerithium kochi (G.A. Goldfuss, 1844 †) - (PROCERITHIIDAE) (FOSSIL)
- kochi, Pseudaganides kochi (Prinz, 1906 †) - (PSEUDONAUTILIDAE) (FOSSIL)
- kochi, Palaeocosmomya kochi Newell, 1955 † - (SANGUINOLITIDAE) (FOSSIL)
- kochi, Sepiadarium kochi J.J.S. Steenstrup, 1881 - (SEPIADARIIDAE)
- kochi, Aylacostoma kochi (A.C. Bernardi, 1856) - (THIARIDAE)
- kochi, Jujubinus kochi F. Nordsieck, 1973 - syn of: Jujubinus ruscurianus (H.C. Weinkauff, 1868) - (TROCHIDAE)
- kochi, Valvata kochi P.S. Pavlovic, 1932 † - (VALVATIDAE) (FOSSIL)
- kochi, Venus kochi R.A. Philippi, 1843 - syn of: Eumarcia paupercula (H.S. Holten, 1802) - (VENERIDAE)
- kochi, Vitrina kochi A. Andreae, 1884 - (VITRINIDAE)
- kochi, Vitrina kochi Auct. non A. Andreae, 1884 - syn of: Eucobresia nivalis (F. Dumont & L.L.G. de Mortillet, 1852) - (VITRINIDAE)
- kochi decorata, Calliostoma kochi decorata P.M. Pallary, 1920 - syn of: Calliostoma kochi P.M. Pallary, 1902 - (CALLIOSTOMATIDAE)
- kochi laevigata, Calliostoma kochi laevigata P.M. Pallary, 1920 - syn of: Calliostoma kochi P.M. Pallary, 1902 - (CALLIOSTOMATIDAE)
- kochi occidentalis, Anguispira kochi occidentalis E.C. Von Martens, 1882 - (DISCIDAE)
- kochi planicosta, Calliostoma kochi planicosta P.M. Pallary, 1920 - syn of: Calliostoma kochi P.M. Pallary, 1902 - (CALLIOSTOMATIDAE)
- kochi polita, Rhinoclavis kochi polita H.B. Preston, 1908 - syn of: Rhinoclavis kochi (R.A. Philippi, 1848) - (CERITHIIDAE)
- kochi recurva, Rhinoclavis kochi recurva (G.B. II Sowerby, 1855) - (CERITHIIDAE)
- kochi trifuniculata, Calliostoma kochi trifuniculata P.M. Pallary, 1920 - syn of: Calliostoma kochi P.M. Pallary, 1902 - (CALLIOSTOMATIDAE)
- Kochia, syn of: Genus Myosotella T.A. de M. Monterosato, 1906 (ELLOBIIDAE)
- Kochia, Genus Kochia Frech, 1891 † (KOCHIIDAE) (FOSSIL)
- kochiana, Tornatellinops kochiana (O.F. von Möllendorff, 1888) - (ACHATINELLIDAE)
- kochiana, Ocinebra kochiana G.B. III Sowerby, 1900 - syn of: Lataxiena cumella (F.P. Jousseaume, 1898) - (MURICIDAE)
- kochianum, Buccinum kochianum R.W. Dunker, 1858 - syn of: Nassarius quantulus (A.A. Gould, 1860) - (BUCCINIDAE)
- kochianus, Argonauta kochianus R.W. Dunker, 1852 - syn of: Argonauta hians J. Lightfoot, 1786 - (ARGONAUTIDAE)
- kochianus, Stilifer kochianus G.B. III Sowerby, 1901 - syn of: Eulima variabilis O. Böttger, 1893 - (EULIMIDAE)
- kochianus, Nassarius kochianus (R.W. Dunker, 1846) - (NASSARIIDAE)
- kochianus crawfordi, Nassarius kochianus crawfordi G.B. III Sowerby, 1892 - (NASSARIIDAE)
- kochiensis, Hemizaptyx stimpsoni kochiensis (H.A. Pilsbry, 1901) - (CLAUSILIIDAE)
- kochiensis, Diplommatina shikokuensis kochiensis J.T. Kuroda & J.M. Abe, 1961 - (DIPLOMMATINIDAE)
- kochiensis, Gryphaeostrea kochiensis Tashiro & Kozai, 1982 † - (GRYPHAEIDAE) (FOSSIL)
- kochigataniensis, Anodontophora kochigataniensis O. Kobayashi & M. Ichikawa, 1950 † - (TRIGONODIDAE) (FOSSIL)
- kochigataniensis hiratai, Anodontophora kochigataniensis hiratai O. Kobayashi & M. Ichikawa, 1950 † - (TRIGONODIDAE) (FOSSIL)
- kochii, Architectonica kochii W.H. Dall, 1909 - (ARCHITECTONICIDAE)
- kochii, Goniochilus kochii (A. Fuchs, 1870 †) - (HYDROBIIDAE) (FOSSIL)
- kochii, Tricolia kochii (R.A. Philippi, 1848) - (PHASIANELLIDAE)
- kochii, Ashmunella kochii W.F. Clapp, 1908 - (POLYGYRIDAE)
- kochii, Pterocera kochii C. Freyer, 1855 - syn of: Harpago chiragra (C. Linnaeus, 1758) - (STROMBIDAE)
- kochii, Trochus kochii (R.A. Philippi, 1844) - (TROCHIDAE)
- kochii, Trochus kochii P.M. Pallary, 1900 - (TROCHIDAE)
- kochii, Infundibulum kochii R.A. Philippi, 1844 - syn of: Trochus kochii (R.A. Philippi, 1844) - (TROCHIDAE)
- KOCHIIDAE Frech, 1891 † - Family (BIVALVIA-PTERIOMORPHIA [Subclass]-PTERIIDA [Order]-PTERIOIDEA [Superfamily]) (FOSSIL)
- kochiriensis, Sinuitopsis kochiriensis Kobayashi, 1930 † - syn of: Modestospira kochiriensis (Kobayashi, 1930 †) - (CYRTOLITIDAE) (FOSSIL)
- kochiriensis, Modestospira kochiriensis (Kobayashi, 1930 †) - (SINUITIDAE) (FOSSIL)
- Kochoceras, Genus Kochoceras Troedsson, 1926 † (ACTINOCERATIDAE) (FOSSIL)
- kochyonense, Centrocyrtoceras kochyonense (T. Kobayashi, 1934 †) - (BARRANDOCERATIDAE) (FOSSIL)
- kochyonense, Cyrtoceras kochyonense T. Kobayashi, 1928 † - syn of: Centrocyrtoceras kochyonense (T. Kobayashi, 1934 †) - (ONCOCERIDA (unassigned)) (FOSSIL)
- kocki, Albinaria kocki H. Nordsieck, 1979 - syn of: Albinaria adrianae E. Gittenberger, 1979 - (CLAUSILIIDAE)
- kockii, Galatea kockii (A.C. Bernardi, 1860) - (DONACIDAE)
- koczyrkeviczi, Xenodiscus koczyrkeviczi Zakharov, 1989 † - (MEEKOCERATIDAE) (FOSSIL)
- kodaijimensis, Vaugonia kodaijimensis Kobayashi & A. Mori, 1955 † - (MYOPHORELLIDAE) (FOSSIL)
- kodairai, Lophospira kodairai Kobayashi, 1930 † - syn of: Lophospira selecta (Billings, 1865 †) - (LOPHOSPIRIDAE) (FOSSIL)
- kodairai, Trigonioides kodairai Kobayashi & Suzuki, 1936 † - (TRIGONIOIDIDAE) (FOSSIL)
- Kododaphne, syn of: Genus Daphnella R.B. Hinds, 1844 (RAPHITOMIDAE)
- kodungensis, Batissa kodungensis Noetling, 1901 † - (CYRENIDAE) (FOSSIL)
- Kodymites, Genus Kodymites Horný, 1962 † (BELLEROPHONTIDAE) (FOSSIL)
- koe, Ostrincola koe M. Tanaka, 1961 - syn of: Sinonovacula constricta (J.B.P.A. Lamarck, 1818) - (PHARIDAE)
- koechlini, Crioceratites koechlini Astier, 1851 † - syn of: Emericiceras koechlini (Astier, 1851 †) - (CRIOCERATITIDAE) (FOSSIL)
- koechlini, Emericiceras koechlini (Astier, 1851 †) - (EMERICICERATIDAE) (FOSSIL)
- koegleri, Inoceramus koegleri Andert, 1911 † - (INOCERAMIDAE) (FOSSIL)
- koehleri, Kryptos koehleri (É.A.A. Locard, 1896) - (BUCCINIDAE)
- koehleri, Phyllodesmium koehleri G.E. Burghardt, M. Schrödl & H. Wägele, 2008 - (FACELINIDAE)
- koehleri, Phyllidia koehleri A. Perrone, 2000 - (PHYLLIDIIDAE)
- koehleri, Turbonilla koehleri A. Peñas & E. Rolán, 2010 - (PYRAMIDELLIDAE)
- koehleri, Pleurotomella koehleri É.A.A. Locard, 1896 - syn of: Kryptos koehleri (É.A.A. Locard, 1896) - (RAPHITOMIDAE)
- koehleri, Unio koehleri J. Germain, 1909 - syn of: Coelatura aegyptiaca koehleri J. Germain, 1909 - (UNIONIDAE)
- koehleri, Coelatura aegyptiaca koehleri J. Germain, 1909 - (UNIONIDAE)
- koehnei, Stekloviella koehnei Schlickum & Strauch, 1972 † - (HELICIDAE) (FOSSIL)
- koellikeri, Octopus koellikeri J.B. Vérany, 1851 - syn of: Tremoctopus violaceus S. Delle Chiaje, 1830 - (OCTOPODIDAE)
- koeneni, Aegocrioceras koeneni Spath, 1924 † - (AEGOCRIOCERATIDAE) (FOSSIL)
- koeneni, Tonohamites koeneni T.L. Casey, 1961 † - (ANCYLOCERATIDAE) (FOSSIL)
- koeneni, Digitaria koeneni (Speyer 1866) † - (ASTARTIDAE) (FOSSIL)
- koeneni, Aglaoglypta koeneni (A.H. Clarke, 1904 †) - (BELLEROPHONTIDAE) (FOSSIL)
- koeneni, Fusulculus koeneni (J.P.J. Ravn, 1939 †) - (BENTHOBIIDAE) (FOSSIL)
- koeneni, Bittium koeneni † - (CERITHIIDAE) (FOSSIL)
- koeneni, Hoplitoides koeneni Solger, 1904 † - (COILOPOCERATIDAE) (FOSSIL)
- koeneni, Pachydiscus koeneni de Grossouvre, 1894 † - syn of: Pachydiscus haldemsis (Schluter, 1867 †) - (DESMOCERATIDAE) (FOSSIL)
- koeneni, Cirsotrema koeneni A.W. Janssen † - (EPITONIIDAE) (FOSSIL)
- koeneni, Eulima koeneni Š. Brusina, 1893 - (EULIMIDAE)
- koeneni, Euthriofusus regularis koeneni L. Dolin & Renard, 1980 † - (FASCIOLARIIDAE) (FOSSIL)
- koeneni, Costamanticoceras koeneni (Holzapfel, 1882 †) - (GEPHUROCERATIDAE) (FOSSIL)
- koeneni, Goniatites koeneni Holzapfel, 1882 † - syn of: Costamanticoceras koeneni (Holzapfel, 1882 †) - (GONIATITIDAE) (FOSSIL)
- koeneni, Panomya koeneni (Steuer 1912) † - (HIATELLIDAE) (FOSSIL)
- koeneni, Sphaera koeneni (Behrendsen †) - (LUCINIDAE) (FOSSIL)
- koeneni, Bensaidites koeneni (Frech, 1902 †) - (MAENIOCERATIDAE) (FOSSIL)
- koeneni, Bela koeneni (A.E.M. Cossmann & A. Lambert, 1884 †) - (MANGELIIDAE) (FOSSIL)
- koeneni, Owenites koeneni A. Hyatt & Smith, 1905 † - (MELAGATHICERATIDAE) (FOSSIL)
- koeneni, Natica koeneni F. Sacco, 1891 † - syn of: Notocochlis dillwynii koeneni (F. Sacco, 1891 †) - (NATICIDAE) (FOSSIL)
- koeneni, Notocochlis dillwynii koeneni (F. Sacco, 1891 †) - (NATICIDAE) (FOSSIL)
- koeneni, Substeueroceras koeneni (Steuer, 1897 †) - (NEOCOMITIDAE) (FOSSIL)
- koeneni, Pseudoliva koeneni J.P.J. Ravn, 1939 † - syn of: Fusulculus koeneni (J.P.J. Ravn, 1939 †) - (PSEUDOLIVIDAE) (FOSSIL)
- koeneni, Ptychomya koeneni Behrendsen, 1892 † - (PTYCHOMYIDAE) (FOSSIL)
- koeneni, Odostomia koeneni (Boettger, 1907 †) - (PYRAMIDELLIDAE) (FOSSIL)
- koeneni, Cingula koeneni M. Glibert, 1952 † - (RISSOIDAE) (FOSSIL)
- koeneni, Scissurella koeneni C.G. Semper, 1865 - (SCISSURELLIDAE)
- koeneni, Terebellum koeneni Marquet, Lenaerts & Laporte, 2016 † - (SERAPHSIDAE) (FOSSIL)
- koeneni, Maeneceras koeneni Frech, 1902 † - syn of: Bensaidites koeneni (Frech, 1902 †) - (SPORADOCERATIDAE) (FOSSIL)
- koeneni, Sigmesalia koeneni Renard, 1994 † - (TURRITELLIDAE) (FOSSIL)
- koeneni, Venus koeneni (Lienenklaus) † - (VENERIDAE) (FOSSIL)
- koeneni coihuicoensis, Ptychomya koeneni coihuicoensis Behrendsen, 1892 † - (PTYCHOMYIDAE) (FOSSIL)
- Koenenia, Genus Koenenia Beushausen, 1884 † (MALLETIIDAE) (FOSSIL)
- koeneniana, Turbonilla koeneniana F. Sacco, 1892 † - (PYRAMIDELLIDAE) (FOSSIL)
- koeneniana, Scissurella koeneniana R. Janssen, 1978 † - (SCISSURELLIDAE) (FOSSIL)
- Koeneniceras, Genus Koeneniceras Mikhailova & Baraboshkin, 2002 † (ANCYLOCERATIDAE) (FOSSIL)
- Koenenites, Genus Koenenites Wedekind , 1913 † (KOENENITIDAE) (FOSSIL)
- KOENENITIDAE Becker & House, 1993 † - Family (CEPHALOPODA-AMMONOIDEA [Subclass]-AGONIATITIDA [Order]-GEPHUROCERATOIDEA [Superfamily]) (FOSSIL)
- koeni, Owenites koeni A. Hyatt & Smith, 1905 † - syn of: Owenites koeneni A. Hyatt & Smith, 1905 † - (MELAGATHICERATIDAE) (FOSSIL)
- koeni, Septifer koeni S. Nomura - (MYTILIDAE)
- koenigi, Vitrinoides koenigi H.R. Simroth, 1912 - (LIMACIDAE)
- koenigi, Proplanulites koenigi (J. de C. Sowerby, 1820) - (PERISPHINCTIDAE)
- koenigswaldi, Odontostomus koenigswaldi (K.H.J. Thiele, 1906) - (ODONTOSTOMIDAE)
- koenigwaldi, Macrodontes koenigwaldi K.H.J. Thiele, 1906 - syn of: Odontostomus koenigswaldi (K.H.J. Thiele, 1906) - (ORTHALICIDAE)
- koenneckeri, Doto koenneckeri H.M. Lemche, 1976 - (DOTIDAE)
- koepckei, Pfeifferiella koepckei (A. Zilch, 1953) - (CLAUSILIIDAE)
- koepckei, Thaumastiella koepckei (A. Zilch, 1953) - (MEGASPIRIDAE)
- koerneri, Eocalliostoma koerneri F. Haas, 1953 † - (PROCONULIDAE) (FOSSIL)
- koerti, Arca koerti Bohm & Weisfermel, 1913 † - (ARCIDAE) (FOSSIL)
- koerti, Noetia koerti Bohm, 1913 † - (NOETIIDAE) (FOSSIL)
- koestneri, Pectinistemma koestneri H.A. Rehder, 1940 - (EPIROBIIDAE)
- koettlitzi, Sepia koettlitzi W.E. Hoyle & R. Standen, 1901 - syn of: Sepia pharaonis C.G. Ehrenberg, 1831 - (SEPIIDAE)
- kofui, Neosuccinea kofui A.H. Patterson, 1971 - (SUCCINEIDAE)
- kogamogai, Lottia kogamogai T. Sasaki & T.A. Okutani, 1994 - (LOTTIIDAE)
- kogenense, Sigmocycloceras kogenense (T. Kobayashi, 1927 †) - (SACTORTHOCERATIDAE) (FOSSIL)
- kogimica, Solenomorpha kogimica Muromtseva, 1984 † - (GRAMMYSIIDAE) (FOSSIL)
- Kogomea, syn of: Genus Gibberula W.J. Swainson, 1840 (CYSTISCIDAE)
- kohalensis, Amastra conica kohalensis A. Hyatt & H.A. Pilsbry, 1911 - (AMASTRIDAE)
- kohatica, Protocypraea kohatica Cox, 1930 † - (CYPRAEIDAE) (FOSSIL)
- Kohaticeras, Genus Kohaticeras Fatmi & Hölder, 1975 † (HILDOCERATIDAE) (FOSSIL)
- koheii, Oscilla koheii (S. Nomura, 1937) - (PYRAMIDELLIDAE)
- kohi, Melanochlamys kohi S. Cooke, D. Hanson & al., 2014 - (AGLAJIDAE)
- kohi, Oliva kohi Hunon, M. Rabiller & G. Richard, 2016 - (OLIVIDAE)
- kohitatea, Tongapyrgus kohitatea M. Haase, 2008 - (TATEIDAE)
- kohllarseni, Georgioceras kohllarseni R.O. Wilckens, 1947 † - (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- kohllarseni, Pisinna kohllarseni P. David, 1934 - syn of: Pisinna minor (H.H. Suter, 1898) - (ANABATHRIDAE)
- kohni, Dauciconus kohni (J.H. McLean & J.W. Nybakken, 1979) - (CONIDAE)
- Kohniconus, Genus Kohniconus J.K. Tucker & M.J. Tenorio, 2009 (CONIDAE)
- koikensis, Somapteria koikensis Tamura 1960 † - (PTERIIDAE) (FOSSIL)
- koikorobensis, Agapella koikorobensis I. Hayami, 1965 † - (ARCTICIDAE) (FOSSIL)
- koilados, Sepia koilados D.G. Reid, 2000 - (SEPIIDAE)
- koillerae, Volvarina koillerae J.A. Ortea, 2014 - (MARGINELLIDAE)
- Koiloceras, Genus Koiloceras Brühwiler & Bucher, 2012 † (GYRONITIDAE) (FOSSIL)
- Koilofera, Genus Koilofera M. Jay & J. Drivas, 2002 (CERITHIOPSIDAE)
- koilofera, Koilofera koilofera M. Jay & J. Drivas, 2002 - (CERITHIOPSIDAE)
- Koinodactylites, Genus Koinodactylites Hyatt, 1867 † (MOLLUSCA INCERTAE SEDIS) (FOSSIL)
- Koipatoceras, Genus Koipatoceras Silberling & Nichols, 1982 † (KHVALYNITIDAE) (FOSSIL)
- koizumii, Acteonina koizumii A. Nützel & Nakazawa, 2012 † - (ACTEONINIDAE) (FOSSIL)
- koizumii, Microliotia koizumii T. Kase, 1998 - (PICKWORTHIIDAE)
- kojimai, Alviniconcha kojimai S.B. Johnson, A. Warén, V. Tunnicliffe & al., 2014 - (PROVANNIDAE)
- kojimense, Paragastrioceras kojimense Chernov, 1939 † - syn of: Paragastrioceras ellipsoidale Fredericks, 1915 † - (PARAGASTRIOCERATIDAE) (FOSSIL)
- kojumdgievae, Corbula gibba kojumdgievae M. Glibert & Poel, 1966 † - (CORBULIDAE) (FOSSIL)
- kojumdgievae, Caspia kojumdgievae Roshka, 1973 † - (HYDROBIIDAE) (FOSSIL)
- kokandicum, Anodonta kokandicum Y.I. Starobogatov & Z.I. Izzatullaev, 1984 - syn of: Anodonta anatina (C. Linnaeus, 1758) - (UNIONIDAE)
- kokanensis, Kokanostrea kokanensis (Sokolov 1910) † - (PTERIOIDEA (UNASSIGNED)) (FOSSIL)
- Kokanostrea, Genus Kokanostrea Vialov, 1936 † (PTERIOIDEA (UNASSIGNED)) (FOSSIL)
- kokcharofi, Pecten kokcharofi de Verneuil, 1845 † - (PECTINIDAE) (FOSSIL)
- kokeilii, Odontocyclas kokeilii (E.A. Rossmässler, 1837) - (CHONDRINIDAE)
- kokelii, Odontocyclas kokelii (E.A. Rossmässler, 1837) - (CHONDRINIDAE)
- Kokenella, Genus Kokenella Kittl, 1891 † (PORCELLIIDAE) (FOSSIL)
- kokeni, Pietteia kokeni (Brösamlen, 1909 †) - (APORRHAIDAE) (FOSSIL)
- kokeni, Alaria kokeni Brösamlen, 1909 † - syn of: Pietteia kokeni (Brösamlen, 1909 †) - (APORRHAIDAE) (FOSSIL)
- kokeni, Guizhouia kokeni Yin & E.L. Yochelson, 1983 † - (ARCHAEOGASTROPODA (UNASSIGNED)) (FOSSIL)
- kokeni, Salpingostoma kokeni Teichert, 1932 † - (BUCANIIDAE) (FOSSIL)
- kokeni, Omphaloptycha kokeni E.A.L. Kittl, 1894 † - syn of: Loxonema kokeni (E.A.L. Kittl, 1894 †) - (COELOSTYLINIDAE) (FOSSIL)
- kokeni, Crassatella kokeni (H.F.A. von Ihering, 1897 †) - (CRASSATELLIDAE) (FOSSIL)
- kokeni, Yochelsonellis kokeni (J. Perner, 1903 †) - (CYRTOLITIDAE) (FOSSIL)
- kokeni, Scythentolium kokeni (Wittenburg, 1909 †) - (ENTOLIIDAE) (FOSSIL)
- kokeni, Straparollus kokeni Spitz, 1907 † - (EUOMPHALIDAE) (FOSSIL)
- kokeni, Umbotropis kokeni (E.F.R.K. Koken, 1889 †) - (GOSSELETINIDAE) (FOSSIL)
- kokeni, Loxonema kokeni (E.A.L. Kittl, 1894 †) - (LOXONEMATIDAE) (FOSSIL)
- kokeni, Murchisonia kokeni Wittenburg, 1908 † - (MURCHISONIIDAE) (FOSSIL)
- kokeni, Hologyra kokeni Böhm, 1895 † - (NATICOPSIDAE) (FOSSIL)
- kokeni, Parapopanoceras kokeni Arthaber, 1908 † - syn of: Procarnites kokeni (Arthaber, 1908 †) - (PARAPOPANOCERATIDAE) (FOSSIL)
- kokeni, Horologium kokeni J. Perner, 1907 † - (PLANITROCHIDAE) (FOSSIL)
- kokeni, Procarnites kokeni (Arthaber, 1908 †) - (PROCARNITIDAE) (FOSSIL)
- kokeni, Katosira kokeni E.A.L. Kittl, 1894 † - (SETTSASSIIDAE) (FOSSIL)
- kokeni, Pleuronautilus kokeni Frech, 1905 † - (TAINOCERATIDAE) (FOSSIL)
- kokeni, Globonema kokeni W.A. Wenz, 1938 † - (TROCHONEMATIDAE) (FOSSIL)
- kokeni, Margaritropites kokeni Smith, 1927 † - (TROPITIDAE) (FOSSIL)
- Kokenia, syn of: Genus Kokenospira Bassler, 1915 † (BUCANIIDAE) (FOSSIL)
- Kokenia, Genus Kokenia Holzapfel 1895 † (MIMOSPHINCTIDAE) (FOSSIL)
- Kokenospira, Genus Kokenospira Bassler, 1915 † (BUCANIIDAE) (FOSSIL)
- Kokikora, Genus Kokikora F.M. Climo & J.F. Goulstone, 1995 (PUNCTIDAE)
- kokolikensis, Cultellus kokolikensis Imlay, 1961 † - (PHARIDAE) (FOSSIL)
- kokonas, Dermatobranchus kokonas T.M. Gosliner & S.J. Fahey, 2011 - (ARMINIDAE)
- Kokopapa, Genus Kokopapa F.M. Climo & Mahlfeld, 2011 (PUNCTIDAE)
- Kokotschashvilia, Genus Kokotschashvilia V. Hüdec & G.I. Lezhawa, 1969 (HYGROMIIDAE)
- Kokotschashvilia, syn of: Subgenus Trichia (Dioscuria) W.A. Lindholm, 1927 (HYGROMIIDAE)
- kokpoktasica, Cathaica kokpoktasica N.L. Tzvetkova, 1950 - syn of: Archaica heptapotamica (W.A. Lindholm, 1927) - (BRADYBAENIDAE)
- kolabana, Goniodoris kolabana R. Winckworth, 1946 - (GONIODORIDIDAE)
- kolaceki, Harpa kolaceki T. Cossignani, 2011 - (HARPIDAE)
- kolarovai, Lottia luchuana kolarovai (A.W. Grabau & S.G. King, 1928) - (LOTTIIDAE)
- kolbajense, Placenticeras kolbajense Sokolov, 1967 † - (PLACENTICERATIDAE) (FOSSIL)
- kolbergi, Isomeria kolbergi (K. Miller, 1878) - (CAMAENIDAE)
- kolbergi ritchieana, Isomeria kolbergi ritchieana H.A. Pilsbry, 1889 - (CAMAENIDAE)
- kolebabai, Sarkanella kolebabai Horný, 2001 † - (CARCASSONNELLIDAE) (FOSSIL)
- kolenatii, Clausilia kolenatii Siemaschko, 1847 - syn of: Caucasica somchetica (L. Pfeiffer, 1846) - (CLAUSILIIDAE)
- kolesnikovi, Stenosemus kolesnikovi B.I. Sirenko, 1994 - (ISCHNOCHITONIDAE)
- kolesnikovi, Anisus kolesnikovi B.M. Logvinenko & Y.I. Starobogatov, 1966 - (PLANORBIDAE)
- kolesnikoviana, Pyrgula kolesnikoviana B.M. Logvinenko & Y.I. Starobogatov, 1966 - (HYDROBIIDAE)
- kolevi, Bythiospeum kolevi D.G. Georgiev, 2013 - (HYDROBIIDAE)
- Kolevia, Genus Kolevia Georgiev & Glöer, 2015 (HYDROBIIDAE)
- kolgae, Rhacothyas kolgae Åström & Oliver, 2017 - (THYASIRIDAE)
- Kolhymamnicola, Genus Kolhymamnicola Y.I. Starobogatov, 1976 (AMNICOLIDAE)
- kolhymensis, Acroloxus kolhymensis L.A. Prozorova & Y.I. Starobogatov, 1998 - (ACROLOXIDAE)
- kolhymensis, Kolhymamnicola kolhymensis (Y.I. Starobogatov & E.A. Streletzkaja, 1967) - (AMNICOLIDAE)
- kolhymensis, Odhneripisidium kolhymensis Y.I. Starobogatov & E.A. Streletzkaja, 1967 - syn of: Pisidium hibernicum C.A. Westerlund, 1894 - (SPHAERIIDAE)
- Kolhymorbis, Genus Kolhymorbis Y.I. Starobogatov & E.A. Streletzkaja, 1967 (PLANORBIDAE)
- Kolihadiscus, Genus Kolihadiscus Horný , 1992 † (CYRTOLITIDAE) (FOSSIL)
- koljanuriensis, Naticopsis koljanuriensis Mazaev, 2015 † - (DELPHINULOPSIDAE) (FOSSIL)
- kollari, Liburnica kollari (L. Pfeiffer, 1856) - (HELICIDAE)
- Kollarix, Genus Kollarix Groenenberg, Subai & E. Gittenberger, 2016 (HELICIDAE)
- kollyi, Chondrula kollyi O. von Retowski, 1889 - syn of: Pseudochondrula tetrodon (L.L.G. de Mortillet, 1854) - (ENIDAE)
- kollyi, Gigantomilax kollyi O. von Retowski, 1889 - (LIMACIDAE)
- kolmodini, Discordichilus kolmodini (Lindström, 1884 †) - (ELASMONEMATIDAE) (FOSSIL)
- kolobensis, Pyrgulopsis kolobensis D.W. Taylor, 1987 - (HYDROBIIDAE)
- Koloceras, Genus Koloceras Riccardi & al., 1987 † (OPPELIIDAE) (FOSSIL)
- Koloonella, Genus Koloonella C.F. Laseron, 1959 (MURCHISONELLIDAE)
- kolos, Acteocina incisula kolos J. Gardner, 1937 † - (ACTEOCINIDAE) (FOSSIL)
- kolosvaryi, Dilataria succineata kolosvaryi (H. Wagner, 1939) - (CLAUSILIIDAE)
- kolpomyrtensis, Albinaria senilis kolpomyrtensis T.C.M. Kemperman & E. Gittenberger, 1990 - (CLAUSILIIDAE)
- kolthoffi, Katadesmia kolthoffi (R. Hägg, 1904) - (MALLETIIDAE)
- kolthoffi, Malletia kolthoffi R. Hägg, 1904 - syn of: Katadesmia kolthoffi (R. Hägg, 1904) - (MALLETIIDAE)
- kolthoffi, Portlandia kolthoffi R. Hägg, 1904 - syn of: Katadesmia kolthoffi (R. Hägg, 1904) - (YOLDIIDAE)
- koltschemensis, Pisidium koltschemensis F. Zatrawkin, 1987 - syn of: Pisidium casertanum (Poli, 1791) - (SPHAERIIDAE)
- koltschomensis, Pisidium koltschomensis Y.I. Kantor & al, 2010 - syn of: Pisidium casertanum (Poli, 1791) - (SPHAERIIDAE)
- kolymaense, Parayakutoceras kolymaense Andrianov, 1985 † - (ORULGANITIDAE) (FOSSIL)
- kolymaense, Epijuresanites kolymaense Andrianov, 1985 † - (SPIROLEGOCERATIDAE) (FOSSIL)
- kolymaensis, Aviculopecten kolymaensis Maslennikow, 1959 † - syn of: Vnigripecten phosphaticus (Girty, 1910 †) - (AVICULOPECTINIDAE) (FOSSIL)
- kolymense, Uraloceras kolymense Bogoslovskaya & Boiko, 2002 † - (PARAGASTRIOCERATIDAE) (FOSSIL)
- kolymensis, Lepiskites kolymensis (A.M. Popov, 1961 †) - (GALFETTITIDAE) (FOSSIL)
- kolymensis, Mimagoniatites kolymensis Bogoslovsky, 1969 † - (MIMAGONIATITIDAE) (FOSSIL)
- kolymensis, Neoschizodus kolymensis Bytschkov, 1976 † - (MYOPHORIIDAE) (FOSSIL)
- kolymensis, Aristoptychites kolymensis Kiparisova, 1937 † - (PTYCHITIDAE) (FOSSIL)
- kolymensis, Omulites kolymensis Lyashenko, 1969 † - (ROSSIITIDAE) (FOSSIL)
- kolymensis, Parasibirites kolymensis Bychkov, 1976 † - (SIBIRITIDAE) (FOSSIL)
- Kolymia, Genus Kolymia Licharew & Einor, 1941 † (KOLYMIIDAE) (FOSSIL)
- kolymiaformis, Maitaia kolymiaformis Biakov, 1992 † - (ATOMODESMATIDAE) (FOSSIL)
- kolymica, Aldanella kolymica Barskova, 1988 † - syn of: Aldanella attleborensis (Shaler & Foerste, 1888 †) - (ALDANELLIDAE) (FOSSIL)
- KOLYMIIDAE Kuznetsov, 1973 † - Family (BIVALVIA-PTERIOMORPHIA [Subclass]-MYALINIDA [Order]-INOCERAMOIDEA [Superfamily]) (FOSSIL)
- Kolymoglaphyrites, Genus Kolymoglaphyrites Kutygin & Ganelin, 2011 † (GLAPHYRITIDAE) (FOSSIL)
- Kolymonectes, Genus Kolymonectes Whiteaves, 1884 † (ENTOLIOIDIDAE) (FOSSIL)
- kolyvanica, Polidevcia kolyvanica Muromtseva, 1974 † - (NUCULANIDAE) (FOSSIL)
- koma, Calliostoma koma (T. Shikama & T. Habe, 1965) - (CALLIOSTOMATIDAE)
- koma, Mesoginella koma B.A. Marshall, 2004 - (MARGINELLIDAE)
- komai, Curveulima komai (T. Habe, 1950) - (EULIMIDAE)
- komaianus, Chiton komaianus (Is. Taki & Iw. Taki, 1929) - (CHITONIDAE)
- komaianus, Rhyssoplax komaianus Is. Taki & Iw. Taki, 1929 - syn of: Chiton komaianus (Is. Taki & Iw. Taki, 1929) - (CHITONIDAE)
- komaii, Bankia komaii Is. Taki & T. Habe, 1945 - syn of: Bankia rochi C.E. von Moll, 1931 - (TEREDINIDAE)
- Komaitrochus, Genus Komaitrochus J.T. Kuroda & Iw. Taki, 1958 (TROCHIDAE)
- komakahida, Oenopota komakahida (K. Otsuka, 1949) - (MANGELIIDAE)
- komakanensis, Aaadonta constricta komakanensis G.A. Solem, 1976 - (ENDODONTIDAE)
- komakimonos, Pulsarella komakimonos (Y. Otuka, 1935) - (BORSONIIDAE)
- komandorensis, Juvenichiton komandorensis B.I. Sirenko, 1975 - (LEPIDOCHITONIDAE)
- komarovae, Anisus komarovae Prysjazhnjuk, 1974 † - (PLANORBIDAE) (FOSSIL)
- komarovi, Acrotoma komarovi O. Böttger, 1881 - syn of: Acrotoma komarowi (O. Böttger, 1881) - (CLAUSILIIDAE)
- komarovi, Buliminus komarovi W. Kobelt, 1890 - syn of: Pseudonapaeus asiaticus (E.C. Von Martens, 1881) - (ENIDAE)
- komarovi, Dahurinaia komarovi V.V. Bogatov & al., 2003 - syn of: Margaritifera dahurica (A.T. von Middendorff, 1850) - (MARGARITIFERIDAE)
- komarowi, Acrotoma komarowi (O. Böttger, 1881) - (CLAUSILIIDAE)
- komarowi, Potomida komarowi O. Böttger, 1880 - syn of: Potomida littoralis (G.L.C.F.D. Cuvier, 1798) - (UNIONIDAE)
- komarowi, Oligolimax komarowi O. Böttger, 1879 - syn of: Phenacolimax annularis (S.E. Studer, 1820) - (VITRINIDAE)
- komarowi, Hyalinia komarowi O. Böttger, 1881 - syn of: Ortizius translucidus (L.L.G. de Mortillet, 1854) - (ZONITIDAE)
- komata, Alocospira komata (P.A. Maxwell, 1992 †) - (ANCILLARIIDAE) (FOSSIL)
- Kombologian, syn of: Genus Calliostoma W.J. Swainson, 1840 (CALLIOSTOMATIDAE)
- Kombologion, syn of: Genus Calliostoma W.J. Swainson, 1840 (CALLIOSTOMATIDAE)
- Komeceras, syn of: Genus Hysteroceras Hyatt , 1900 † (BRANCOCERATIDAE) (FOSSIL)
- komensis, Helix komensis W. Kobelt, 1899 - syn of: Chilostoma pouzolzi montenegrina (E.A. Rossmässler, 1836) - (HELICIDAE)
- komenskyi, Belgrandiella komenskyi V. Hüdec, 1972 - (HYDROBIIDAE)
- Komenskyspira, Genus Komenskyspira Horný, 1992 † (TYCHOBRAHEIDAE) (FOSSIL)
- kometubus, Nassarius kometubus Y. Otuka, 1934 † - (NASSARIIDAE) (FOSSIL)
- komiense, Infundibuloceras komiense (P.A. Zhuravleva, 1978 †) - (ORTHOCERATIDAE) (FOSSIL)
- komiensis, Ungulites komiensis P.A. Zhuravleva, 1972 † - syn of: Ukhtoceras uchtense (Holzapfel, 1899 †) - (DISCOSORIDA (unassigned)) (FOSSIL)
- komiensis, Wilkingia komiensis Maslennikov, 1935 † - syn of: Myonia komiensis (Maslennikov, 1935 †) - (SANGUINOLITIDAE) (FOSSIL)
- komiensis, Myonia komiensis (Maslennikov, 1935 †) - (VACUNELLIDAE) (FOSSIL)
- komihevitraense, Beudanticeras komihevitraense M. Collignon, 1950 † - (DESMOCERATIDAE) (FOSSIL)
- Komioceras, Genus Komioceras Bogoslovsky , 1958 † (KOENENITIDAE) (FOSSIL)
- komitica, Coccopigya komitica B.A. Marshall, 1986 † - (COCCULINIDAE) (FOSSIL)
- komitica, Opalia komitica (C.R. Laws, 1944 †) - (EPITONIIDAE) (FOSSIL)
- komitica, Emarginula komitica C.R. Laws, 1939 † - (FISSURELLIDAE) (FOSSIL)
- komitica, Pectinodonta komitica B.A. Marshall, 1985 † - (PECTINODONTIDAE) (FOSSIL)
- komitica, Eulimella komitica C.R. Laws, 1939 † - (PYRAMIDELLIDAE) (FOSSIL)
- komitica, Turbonilla komitica C.R. Laws, 1937 † - (PYRAMIDELLIDAE) (FOSSIL)
- komiticum, Herpetopoma komiticum (C.R. Laws, 1939 †) - (CHILODONTIDAE) (FOSSIL)
- komiticus, Chicoreus komiticus (H.H. Suter, 1917 †) - (MURICIDAE) (FOSSIL)
- komiticus, Inquisitor komiticus C.R. Laws, 1939 † - (PSEUDOMELATOMIDAE) (FOSSIL)
- komiticus, Scaphander komiticus C.R. Laws, 1939 † - (SCAPHANDRIDAE) (FOSSIL)
- komodai, Crassatella komodai K. Oyama & A. Mizuno, 1958 † - (CRASSATELLIDAE) (FOSSIL)
- komodoensis, Asperitas trochus komodoensis T. Haltenorth & S.G.A. Jaeckel, 1940 - (DYAKIIDAE)
- kompi, Zetekina kompi (J.P.E. Morrison, 1946) - (COCHLIOPIDAE)
- kompsus, Canaridiscus kompsus (J.F. Mabille, 1883) - (DISCIDAE)
- kona, Glycymeris kona W.H. Dall, P. Bartsch & H.A. Rehder, 1938 - syn of: Tucetona kauaia (W.H. Dall, P. Bartsch & H.A. Rehder, 1938) - (GLYCYMERIDIDAE)
- Kona, syn of: Genus Thecodonta A. Adams, 1864 (MONTACUTIDAE)
- kona, Lyropupa ovatula kona H.A. Pilsbry & C.M. Cooke, 1920 - (VERTIGINIDAE)
- konaensis, Tornatellides konaensis C.M. Cooke & H.A. Pilsbry, 1915 - (ACHATINELLIDAE)
- konaensis, Leptachatina konaensis E.R. Sykes, 1900 - (AMASTRIDAE)
- konaensis, Kaliella konaensis E.R. Sykes, 1896 - (CHRONIDAE)
- konaensis, Euconulus konaensis E.R. Sykes, 1897 - (EUCONULIDAE)
- konaensis, Pleuropoma laciniosa konaensis M.C. Neal, 1934 - (HELICINIDAE)
- konaensis, Succinea konaensis E.R. Sykes, 1897 - (SUCCINEIDAE)
- konaensis, Bankia konaensis C.H. Edmondson, 1942 - syn of: Bankia bipalmulata (J.B.P.A. Lamarck, 1801) - (TEREDINIDAE)
- konaensis olaaensis, Leptachatina konaensis olaaensis C.M. Cooke, 1910 - (AMASTRIDAE)
- konahuanui, Philonesia konahuanui H.B. Baker, 1940 - (EUCONULIDAE)
- konai, Xenophora konai T. Habe, 1953 - (XENOPHORIDAE)
- konana, Partulina physa konana H.A. Pilsbry & C.M. Cooke, 1914 - (ACHATINELLIDAE)
- konbo, Konbostrea konbo (I.I. Hayasaka †) - (PTERIIDA (UNASSIGNED)) (FOSSIL)
- Konbostrea, Genus Konbostrea Chinzei, 1986 † (PTERIIDA (UNASSIGNED)) (FOSSIL)
- kondai, Trochopsidea kondai J. Szabo, 1981 † - (ATAPHRIDAE) (FOSSIL)
- kondai, Metaderoceras gemmellaroi kondai Geczy, 1976 † - (EODEROCERATIDAE) (FOSSIL)
- Kondakovia, Genus Kondakovia Y.A. Filippova, 1972 (ONYCHOTEUTHIDAE)
- kondangensis, Nassarius kondangensis (C.H. Oostingh, 1939 †) - (NASSARIIDAE) (FOSSIL)
- Kondoa, Genus Kondoa F.C. Baker, 1941 (TROCHOMORPHIDAE)
- Kondoconcha, Genus Kondoconcha G.A. Solem, 1976 (ENDODONTIDAE)
- kondoi, Vatusila kondoi G.A. Solem, 1983 - (CHAROPIDAE)
- kondoi, Okenia kondoi (I. Hamatani, 2001) - (GONIODORIDIDAE)
- kondoi, Paramiella kondoi (W.J. Clench, 1940) - (NEOCYCLOTIDAE)
- kondoi, Sinezona kondoi H.S. Ladd, 1970 † - (SCISSURELLIDAE) (FOSSIL)
- kondoi, Xenophora peroniana kondoi W.F. Ponder, 1983 - (XENOPHORIDAE)
- Kondoraphe, Genus Kondoraphe W.J. Clench, 1940 (NEOCYCLOTIDAE)
- Kondorhaphe, Genus Kondorhaphe W.J. Clench, 1949 (NEOCYCLOTIDAE)
- kondorum, Hogolua kondorum H.B. Baker, 1941 - (TROCHOMORPHIDAE)
- kondorum, Kondoa kondorum Unknown - (TROCHOMORPHIDAE)
- Kondosuccinea, Genus Kondosuccinea Patterson, 1989 (SUCCINEIDAE)
- Konduria, Genus Konduria Sánchez, 2007 † (KONDURIIDAE) (FOSSIL)
- KONDURIIDAE Sánchez, 2007 † - Family (BIVALVIA-HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-SOLENIDA [Order]-ORTHONOTOIDEA [Superfamily]) (FOSSIL)
- koneckii, Modiolus koneckii Dickins, 1963 † - (MYTILIDAE) (FOSSIL)
- Koneprusellia, Genus Koneprusellia Frýda, 1998 † (PORCELLIIDAE) (FOSSIL)
- koneprusiana, Alaina koneprusiana Alberti, 1998 † - (CRASSILINIDAE) (FOSSIL)
- kongaensis, Conus kongaensis A.J. Da Motta, 1984 - syn of: Graphiconus wittigi (J.G. Walls, 1977) - (CONIDAE)
- Konglingites, Genus Konglingites Zhao & Liang, 1966 † (ARAXOCERATIDAE) (FOSSIL)
- Konglungenoceras, Genus Konglungenoceras Sweet, 1959 † (CYRTOGOMPHOCERATIDAE) (FOSSIL)
- kongoensis, Aegista gottschei kongoensis J.T. Kuroda & M. Miyanaga, 1939 - (BRADYBAENIDAE)
- kongoensis, Eostrobilops kongoensis J.T. Kuroda & M. Miyanaga, 1939 - (STROBILOPSIDAE)
- kongshanensis, Formosana kongshanensis H. Nordsieck, 2007 - (CLAUSILIIDAE)
- Kongsrudia, Genus Kongsrudia F. Lygre & C.F.C. Schander, 2010 (PYRAMIDELLIDAE)
- Koniakaua, Subgenus Rimulopsis (Koniakaua) Dacqué, 1933 † (FISSURELLIDAE) (FOSSIL)
- konigi, Buliminus konigi O. von Retowski, 1914 - syn of: Imparietula schelkovnikovi (O.W. Von Rosen, 1914) - (ENIDAE)
- koninckana, Pseudolimea koninckana (Chapuis & G.J.G. Dewalque, 1853 †) - (LIMIDAE) (FOSSIL)
- koninckeana, Turritella koninckeana Münster, 1841 † - syn of: Promathildia biserta (Münster, 1841 †) - (TURRITELLIDAE) (FOSSIL)
- konincki, Teutonophon konincki (Weir, 1931 †) - (BELLEROPHONTIDAE) (FOSSIL)
- konincki, Trypanostylus konincki Münster, 1841 † - (COELOSTYLINIDAE) (FOSSIL)
- konincki, Euphemites konincki Weir, 1931 † - (EUPHEMITIDAE) (FOSSIL)
- konincki, Eurydesma hobartense konincki Johnston, 1887 † - (EURYDESMATIDAE) (FOSSIL)
- konincki, Hippocardia konincki J.L.Jr. Baily, 1871 † - (HIPPOCARDIIDAE) (FOSSIL)
- konincki, Pachydomus konincki Johnston, 1887 † - syn of: Eurydesma hobartense konincki Johnston, 1887 † - (MEGADESMIDAE) (FOSSIL)
- konincki, Oriostoma konincki Oehlert, 1877 † - (ORIOSTOMATIDAE) (FOSSIL)
- konincki, Parapronorites konincki (C. Gemmellaro, 1887 †) - (PRONORITIDAE) (FOSSIL)
- konincki, Prionolobus konincki Tozer, 1994 † - (PROPTYCHITIDAE) (FOSSIL)
- konincki, Vestinautilus konincki (A.V.M.D. D'Orbigny, 1850 †) - (TRIGONOCERATIDAE) (FOSSIL)
- konincki, Turris konincki P. Nyst, 1843 † - (TURRIDAE) (FOSSIL)
- koninckianum, Meekoceras koninckianum (L. Waagen, 1895 †) - (MEEKOCERATIDAE) (FOSSIL)
- koninckianus, Goniatites koninckianus de Verneuil, 1845 † - syn of: Popanoceras sobolewskyanum (de Verneuil, 1845 †) - (GONIATITIDAE) (FOSSIL)
- koninckii, Limipecten koninckii (F.B. Meek & A.H. Worthen, 1860 †) - (AVICULOPECTINIDAE) (FOSSIL)
- koninckii, Chiton koninckii Eudes-Deslongchamps, 1849 † - (CHITONIDAE) (FOSSIL)
- koninckii, Semicypraea koninckii (M. Rouault, 1850 †) - (CYPRAEIDAE) (FOSSIL)
- koninckii, Balbinipleura koninckii K. Bandel & Frýda, 1996 † - (GOSSELETINIDAE) (FOSSIL)
- koninckii, Pleurorhynchus koninckii J.L.Jr. Baily, 1873 † - syn of: Globocardia koninckii (J.L.Jr. Baily, 1873 †) - (HIPPOCARDIIDAE) (FOSSIL)
- koninckii, Globocardia koninckii (J.L.Jr. Baily, 1873 †) - (HIPPOCARDIOIDEA (UNASSIGNED)) (FOSSIL)
- Koninckioceras, syn of: Genus Millkoninckioceras Kummel, 1963 † (KONINCKIOCERATIDAE) (FOSSIL)
- KONINCKIOCERATIDAE Hyatt in Zittel, 1900 † - Family (CEPHALOPODA-NAUTILOIDEA [Subclass]-NAUTILIDA [Order]-TAINOCERATOIDEA [Superfamily]) (FOSSIL)
- Koninckites, Genus Koninckites Toula, 1896 † (BEYRICHITIDAE) (FOSSIL)
- Koninckitoides, Genus Koninckitoides Dagis & Ermakova, 1988 † (PROPTYCHITIDAE) (FOSSIL)
- Koninckopecten, Genus Koninckopecten Wilson, 1967 † (BIVALVIA INCERTAE SEDIS) (FOSSIL)
- konitsae, Montenegrina skipetarica konitsae H. Nordsieck, 1972 - (CLAUSILIIDAE)
- koniyaensis, Hemiphaedusa koniyaensis H.A. Pilsbry, 1908 - (CLAUSILIIDAE)
- konkanensis, Semiricinula konkanensis (J.C. Melvill, 1893) - (MURICIDAE)
- konkanica, Anodonta konkanica J.R. Bourguignat, 1885 - syn of: Anodonta cygnea (C. Linnaeus, 1758) - (UNIONIDAE)
- konkensis, Venus konkensis Sokolov † - (VENERIDAE) (FOSSIL)
- konninckeana, Turritella konninckeana Münster, 1841 † - syn of: Promathildia biserta (Münster, 1841 †) - (TURRITELLIDAE) (FOSSIL)
- konnincki, Anatomites konnincki Mojsisovics, 1893 † - (HALORITIDAE) (FOSSIL)
- konninkana, Melania konninkana Münster, 1841 † - syn of: Trypanostylus konincki Münster, 1841 † - (THIARIDAE) (FOSSIL)
- konnoi, Lophospira konnoi Kobayashi, 1930 † - syn of: Lophospira selecta (Billings, 1865 †) - (LOPHOSPIRIDAE) (FOSSIL)
- konobasis, Euomphalus konobasis Jeffery & al., 1994 † - (EUOMPHALIDAE) (FOSSIL)
- konoi, Xenophora mekranensis konoi T. Habe, 1953 - (XENOPHORIDAE)
- Konophora, syn of: Genus Athoracophorus A. Gould, 1852 (ATHORACOPHORIDAE)
- konops, Horologica konops M. Jay & J. Drivas, 2002 - (CERITHIOPSIDAE)
- konos, Perrinia konos (K.H. Barnard, 1964) - (CHILODONTIDAE)
- konos, Mitrella konos (K.H. Barnard, 1964) - (COLUMBELLIDAE)
- konos, Ilanga konos (C. Vilvens, 2009) - (SOLARIELLIDAE)
- konovalovae, Brephulopsis konovalovae N. Gural-Sverlova & R.I. Gural, 2010 - (ENIDAE)
- konstantinovici, Pyrgula konstantinovici P.S. Pavlovic, 1932 † - (HYDROBIIDAE) (FOSSIL)
- kontanum, Deroceras kontanum (H.R. Simroth, 1904) - (AGRIOLIMACIDAE)
- kontiki, Caecum kontiki M. Pizzini & B.K. Raines, 2011 - (CAECIDAE)
- kontiki, Nesiocypraea midwayensis kontiki F.Jr. Lorenz, 2012 - (CYPRAEIDAE)
- kontkiewiczi, Praemeroceras kontkiewiczi Dybczynski, 1913 † - syn of: Dimeroceras kontkiewiczi (Dybczynski, 1913 †) - (CHEILOCERATIDAE) (FOSSIL)
- kontkiewiczi, Dimeroceras kontkiewiczi (Dybczynski, 1913 †) - (DIMEROCERATIDAE) (FOSSIL)
- kontkiewiczi, Grossouvria kontkiewiczi (Siemiradzki, 1894 †) - (PERISPHINCTIDAE) (FOSSIL)
- kontkiewiczi, Evlanoceras kontkiewiczi (Gurich, 1896 †) - (POLYELASMOCERATIDAE) (FOSSIL)
- kontschani, Montenegrina laxa kontschani Z. Eröss & M. Szekeres, 2006 - (CLAUSILIIDAE)
- koolanensis, Kimboraga koolanensis (T. Iredale, 1939) - (CAMAENIDAE)
- koolauensis, Planamastra spaldingi koolauensis C.M. Cooke, 1933 - (AMASTRIDAE)
- koolhoveni, Mitra koolhoveni C.H. Oostingh, 1939 - syn of: Mitra imperialis P.F. Röding, 1798 - (MITRIDAE)
- kooli, Nassarius kooli H. Dekker & A.M. Dekkers, 2009 - (NASSARIIDAE)
- kooli, Varicospira kooli R.G. Moolenbeek & H. Dekker, 2007 - (ROSTELLARIIDAE)
- koolsae, Condylocardia koolsae E.V. Coan, 2003 - (CONDYLOCARDIIDAE)
- koon, Emarginula koon R.N. Kilburn, 1978 - (FISSURELLIDAE)
- Koonsia, syn of: Genus Pleurobranchaea J.F. Meckel in S.F. Leue, 1813 (PLEUROBRANCHAEIDAE)
- kooringensis, Glyptorhagada kooringensis (G.F. Angas, 1877) - (CAMAENIDAE)
- kootaniensis, Fisherola nuttalli kootaniensis (W. Baird, 1863) - (LYMNAEIDAE)
- Kootenaia, Genus Kootenaia A.B. Leonard, L.F. Chichester, J. Baugh & T. Wilke, 2003 (ANADENIDAE)
- Kopaninoceras, Genus Kopaninoceras Kiselev , 1969 † (ORTHOCERATIDAE) (FOSSIL)
- kopeki, Villania kopeki Géczy, 1998 † - (PHRICODOCERATIDAE) (FOSSIL)
- koperbergae, Manaria koperbergae Fraussen & Stahlschmidt, 2016 † - (BUCCINIDAE) (FOSSIL)
- koperbergae, Bursa koperbergae C.O. Van Regteren Altena, 1942 - syn of: Bursina gnorima (J.C. Melvill, 1918) - (BURSIDAE)
- koperbergae, Bufonaria koperbergae C.O. Van Regteren Altena, 1942 - syn of: Bursina gnorima (J.C. Melvill, 1918) - (BURSIDAE)
- koperbergae, Natica koperbergae A.N. van der Bijl & R.G. Moolenbeek, 2009 - (NATICIDAE)
- koperbergi, Cominella koperbergi K. Martin, 1933 - syn of: Buccinaria jonkeri (E.J. Koperberg, 1931) - (BUCCINIDAE)
- koperbergi, Amphidromus inversus koperbergi F.F. Laidlaw & G.A. Solem, 1961 - (CAMAENIDAE)
- koperbergi, Pictorium koperbergi (M.M. Schepman, 1907) - (CERITHIIDAE)
- koperbergi, Ditropopsis koperbergi (A. Zilch, 1955) - (CYCLOPHORIDAE)
- koperbergi, Buccinaria koperbergi K. Martin, 1933 - syn of: Buccinaria jonkeri (E.J. Koperberg, 1931) - (RAPHITOMIDAE)
- kopetdaghensis, Colchidites ratshensis kopetdaghensis Tovbina, 1963 † - (ANCYLOCERATIDAE) (FOSSIL)
- kophameli, Calliostoma kophameli H. Strebel, 1905 - syn of: Calliostoma nudum (R.A. Philippi, 1845) - (CALLIOSTOMATIDAE)
- kophameli, Drillia kophameli H. Strebel, 1905 - (DRILLIIDAE)
- kophameli, Margarites kophameli (H. Strebel, 1905) - (MARGARITIDAE)
- Kophinoceras, Genus Kophinoceras Hyatt, 1884 † (ONCOCERIDA (UNASSIGNED)) (FOSSIL)
- kophos, Glossodoris kophos N. Yonow, 2001 - (CHROMODORIDIDAE)
- kopiki, Harpoceras kopiki Wierzbowski & Kuliki, 1981 † - syn of: Pseudolioceras lythense (A.T. Young & Bird, 1828 †) - (HILDOCERATIDAE) (FOSSIL)
- Kopionella, syn of: Subgenus Plaxiphora (Fremblya) H. Adams, 1866 (MOPALIIDAE)
- koppeli, Drymaeus koppeli (G.B. I Sowerby, 1892) - (BULIMULIDAE)
- koprivnensis, Belgrandiella koprivnensis P. Radoman, 1975 - (HYDROBIIDAE)
- koptaweliensis, Elgonocyclus koptaweliensis (J. Germain, 1934) - (CYCLOPHORIDAE)
- koptawelilensis, Micractaeon koptawelilensis (J. Germain, 1934.) - (MICRACTAEONIDAE)
- koptawelilensis, Pseudopeas koptawelilensis (J. Germain, 1934.) - syn of: Micractaeon koptawelilensis (J. Germain, 1934.) - (SUBULINIDAE)
- kopua, Anatoma kopua D.L. Geiger & B.A. Marshall, 2012 - (ANATOMIDAE)
- kopua, Selastele kopua (B.A. Marshall, 1995) - (CALLIOSTOMATIDAE)
- kopua, Maoricrypta kopua B.A. Marshall, 2003 - (CALYPTRAEIDAE)
- kopua, Cocculinella kopua (B.A. Marshall, 1983) - (COCCULINELLIDAE)
- kopua, Sagamilepeta kopua B.A. Marshall, 1983 - syn of: Cocculinella kopua (B.A. Marshall, 1983) - (LEPETIDAE)
- kopua, Poirieria kopua R.K. Dell, 1956 - (MURICIDAE)
- kopua, Zetela kopua B.A. Marshall, 1999 - (SOLARIELLIDAE)
- koputaroa, Powelliphanta traversi koputaroa A.W.B. Powell, 1946 - (RHYTIDIDAE)
- Kora, Genus Kora L.R.L. Simone, 2012 (BULIMULIDAE)
- kora, Pegophysema kora (D.W. Taylor & E.A. Glover, 2005) - (LUCINIDAE)
- korabensis, Triloba thaumasia korabensis (A.J. Wagner, 1919) - (CLAUSILIIDAE)
- korabensis, Helicigona korabensis P. Subai, 1997 - (HELICIDAE)
- korabensis, Gyralina korabensis (F. Riedel, 1970) - (ZONITIDAE)
- koragae, Paryphantopsis koragae J. Slapcinsky, 2005 - (CHAROPIDAE)
- korantengi, Turbonilla korantengi F. Lygre & C.F.C. Schander, 2010 - (PYRAMIDELLIDAE)
- koratensis, Stenothyra koratensis R.A.M. Brandt, 1968 - (STENOTHYRIDAE)
- koratensis holosculpta, Stenothyra koratensis holosculpta (R.A.M. Brandt, 1974) - (STENOTHYRIDAE)
- Koratia, Subgenus Hemiplecta (Koratia) H.H. Godwin-Austen, 1919 (ARIOPHANTIDAE)
- korchinskajae, Grumantoceras korchinskajae E.S. Sobolev, 1989 † - (TAINOCERATIDAE) (FOSSIL)
- kordeae, Erraticornus kordeae A.V. Sysoev, 1973 † - (ALTAICORNIDAE) (FOSSIL)
- kordofana, Lanistes ovatus kordofana (R.A. Philippi) - (AMPULLARIIDAE)
- kordosi, Czabalaya kordosi K. Bandel & F. Riedel, 1994 † - (VIVIPARIDAE) (FOSSIL)
- Koreamya, Genus Koreamya C.F. Lützen, J.S. Hong & H. Yamashita, 2009 (MONTACUTIDAE)
- koreana, Bradybaena koreana L. Pfeiffer, 1846 - (BRADYBAENIDAE)
- koreana, Neptunea koreana T.C. Yen, 1976 - (BUCCINIDAE)
- koreana, Megacardita koreana T. Habe & K. Itô, 1965 - (CARDITIDAE)
- koreana, Novisuccinea lyrata koreana (H.A. Pilsbry, 1927) - (SUCCINEIDAE)
- koreana, Duplicaria koreana (E.K. Yoo, 1976) - (TEREBRIDAE)
- koreana, Buldowskia koreana V.V. Bogatov & Y.I. Starobogatov, 1996 - syn of: Anemina arcaeformis (P.M. Heude, 1877) - (UNIONIDAE)
- Koreanaia, Genus Koreanaia Yang, 1976 (TRIGONIOIDIDAE) (FOSSIL)
- koreanica, Solariella koreanica W.H. Dall, 1919 - syn of: Margarites koreanicus (W.H. Dall, 1919) - (SOLARIELLIDAE)
- koreanicus, Margarites koreanicus (W.H. Dall, 1919) - (MARGARITIDAE)
- Koreanohadra, syn of: Genus Bradybaena H.H. Beck, 1837 (BRADYBAENIDAE)
- Koreanomelania, Genus Koreanomelania J.B. Burch & P.O. Jung, 1988 (SEMISULCOSPIRIDAE)
- koreanum, Buccinum koreanum B.L. Choe, S.H. Yoon & T. Habe, 1992 - (BUCCINIDAE)
- koreanus, Musculus koreanus K.W. Ockelmann, 1983 - (MYTILIDAE)
- Koreelahropa, Genus Koreelahropa Stanisic, 2010 (CHAROPIDAE)
- koreni, Bathyarca koreni D.C. Danielssen, 1859 - syn of: Bathyarca pectunculoides (A. Scacchi, 1834) - (ARCIDAE)
- koreni, Oenopota koreni (H.B.S. Friele, 1886) - (MANGELIIDAE)
- Korenia, syn of: Genus Gibbula Risso, 1826 † (TROCHIDAE) (FOSSIL)
- korenii, Poromya korenii S.L. Lovén, 1846 - syn of: Poromya granulata (P. Nyst & G.D. Westendorp, 1839) - (POROMYIDAE)
- Koreoleptoxis, Genus Koreoleptoxis J.B. Burch & P.O. Jung, 1988 (SEMISULCOSPIRIDAE)
- Koreozospeum, Genus Koreozospeum Jochum & Prozorova, 2015 (ELLOBIIDAE)
- korfiense, Profulvia korfiense K.B. Barinov, 1987 † - (CARDIIDA (UNASSIGNED)) (FOSSIL)
- korfiensis, Anadara korfiensis V.N. Sinelnikova, 1987 † - (ARCIDAE) (FOSSIL)
- korfiensis, Papyridea korfiensis K.B. Barinov, 1987 † - syn of: Profulvia korfiense K.B. Barinov, 1987 † - (CARDIIDAE) (FOSSIL)
- korfiensis, Pandora korfiensis V.N. Sinelnikova, 1987 † - (PANDORIDAE) (FOSSIL)
- korfiensis, Kotorapecten korfiensis V.N. Sinelnikova, 1975 † - (PECTINIDAE) (FOSSIL)
- Korilithes, Genus Korilithes Rozanov & al., 1969 † (HYOLITHIDAE) (FOSSIL)
- korjakensis, Cardiomya korjakensis Volobueva, 1994 † - (CUSPIDARIIDAE) (FOSSIL)
- korkodonica, Aphanaia korkodonica Biakov, 2011 † - (ATOMODESMATIDAE) (FOSSIL)
- korkosi, Prosimnia korkosi D. Fehse, 2005 - (OVULIDAE)
- korkosi, Clanculus korkosi B.S. Singer, H.K. Mienis & D.L. Geiger, 2000 - (TROCHIDAE)
- korlevici, Radix korlevici (Š. Brusina, 1884 †) - (LYMNAEIDAE) (FOSSIL)
- kormosi, Bulinus kormosi L. Soós, 1934 † - (PLANORBIDAE) (FOSSIL)
- kormosi, Vivipara kormosi W. Kobelt, 1909 - syn of: Viviparus acerosus J.R. Bourguignat, 1862 - (VIVIPARIDAE)
- kormosiana, Vivipara kormosiana W. Kobelt, 1907 - syn of: Viviparus acerosus J.R. Bourguignat, 1862 - (VIVIPARIDAE)
- kornebaense, Pseudocrioceras kornebaense Kakabadze, 1981 † - (ANCYLOCERATIDAE) (FOSSIL)
- korni, Pseudolilliconus korni (G. Raybaudi Massilia, 1993) - (CONIDAE)
- korni, Kingites korni Brühwiler & al., 2010 † - (MELAGATHICERATIDAE) (FOSSIL)
- korni, Irdanites korni Klug, 2001 † - (TEICHERTICERATIDAE) (FOSSIL)
- korni, Falcitornoceras korni Becker, 1993 † - (TORNOCERATIDAE) (FOSSIL)
- korniana, Aelga korniana (Krishtofovich, 1957 †) - (PERIPLOMATIDAE) (FOSSIL)
- korniana elongata, Malletia korniana elongata Krishtofovich † - syn of: Malletia ovalis Krishtofovich, 1969 † - (MALLETIIDAE) (FOSSIL)
- kornisi, Campylaea kornisi M. von Kimakowicz, 1890 - syn of: Faustina illyrica (G. Stabile, 1864) - (HELICIDAE)
- Kornoutella, Genus Kornoutella Horný, 1997 † (PROTOCONCHOIDIDAE) (FOSSIL)
- korobceevensis, Dubariscala korobceevensis (Gerasimov, 1992 †) - (EPITONIIDAE) (FOSSIL)
- korobceevensis, Plicacerithium korobceevensis Gerasimov, 1992 † - syn of: Dubariscala korobceevensis (Gerasimov, 1992 †) - (PROCERITHIIDAE) (FOSSIL)
- korobcheevoensis, Stegocoelia korobcheevoensis Mazaev, 2001 † - (GONIASMATIDAE) (FOSSIL)
- korobebe, Fluviopupa korobebe S. Zielske & M. Haase, 2014 - (HYDROBIIDAE)
- korobkovi, Epacrochordiceras korobkovi Zharnikova, 1981 † - syn of: Acrochordiceras hyatti F.B. Meek, 1877 † - (ACROCHORDICERATIDAE) (FOSSIL)
- korobkovi, Latouchella korobkovi Vostokova, 1962 † - syn of: Oelandiella korobkovi (Vostokova, 1962 †) - (COREOSPIRIDAE) (FOSSIL)
- korobkovi, Oelandiella korobkovi (Vostokova, 1962 †) - (HELCIONELLIDAE) (FOSSIL)
- korobkovi, Turricaspia korobkovi Roshka, 1973 † - (HYDROBIIDAE) (FOSSIL)
- korobkovi, Korobkovitrigonia korobkovi Saveliev, 1958 † - (MYOPHORELLIDAE) (FOSSIL)
- korobkovi, Hypergonia korobkovi Licharev, 1975 † - (ORTHONEMIDAE) (FOSSIL)
- korobkovi, Scalaspira korobkovi (O.V. Amitrov, 2005 †) - (STREPSIDURIDAE) (FOSSIL)
- korobkovi, Psammacoma korobkovi A.I. Kafanov, 2001 † - (TELLINIDAE) (FOSSIL)
- korobkovi, Miocardiopsis korobkovi Meszaros, 1957 † - (TRAPEZIDAE) (FOSSIL)
- Korobkovia, Genus Korobkovia Glibert & van de Poel, 1965 † (PECTINIDAE) (FOSSIL)
- Korobkoviella, Genus Korobkoviella Merklin, 1974 † (CARDIIDA (UNASSIGNED)) (FOSSIL)
- Korobkovitrigonia, Genus Korobkovitrigonia Saveliev, 1958 † (MYOPHORELLIDAE) (FOSSIL)
- koroensis, Euplacostylus koroensis (A. Garrett, 1872) - (BOTHRIEMBRYONTIDAE)
- koroensis, Bulimus koroensis A. Garrett, 1872 - syn of: Euplacostylus koroensis (A. Garrett, 1872) - (BULIMULIDAE)
- koroensis, Trivirostra koroensis H.S. Ladd, 1934 - syn of: Trivirostra hordacea (L.C. Kiener, 1843) - (TRIVIIDAE)
- korolevae, Crenella korolevae Krishtofovich, 1972 † - syn of: Crenella noyamiana Kogan, 1964 † - (MYTILIDAE) (FOSSIL)
- korolevu, Bistolida korolevu W.R. Steadman & B.C. Cotton, 1943 - syn of: Bistolida hirundo rouxi (C.M.F. Ancey, 1882) - (CYPRAEIDAE)
- kororensis, Semperdon kororensis (R.H. Beddome, 1889) - (CHAROPIDAE)
- kororensis, Endodonta kororensis R.H. Beddome, 1889 - syn of: Semperdon kororensis (R.H. Beddome, 1889) - (ENDODONTIDAE)
- Kororia, Genus Kororia F.C. Baker, 1941 (EUCONULIDAE)
- korostelevi, Kingites korostelevi Zakharov, 1978 † - (MELAGATHICERATIDAE) (FOSSIL)
- korotnevi, Pseudancylastrum korotnevi Y.I. Starobogatov, 1989 - (ACROLOXIDAE)
- korotnevi, Korotnewia korotnevi (W.A. Lindholm, 1909) - (AMNICOLIDAE)
- korotnevi, Choanomphalus korotnevi W.A. Lindholm, 1909 - (PLANORBIDAE)
- korotnevi, Pisidium korotnevi (W.A. Lindholm, 1909) - (SPHAERIIDAE)
- korotnevi, Pisidium korotnevi Kozhov, 1936 - syn of: Pisidium trigonoides (W. Dybowski, 1902) - (SPHAERIIDAE)
- korotnevi, Euglesa korotnevi W.A. Lindholm, 1909 - syn of: Pisidium korotnevi (W.A. Lindholm, 1909) - (SPHAERIIDAE)
- korotnevi, Cincinna korotnevi (W.A. Lindholm, 1909) - (VALVATIDAE)
- korotnevi elatior, Choanomphalus korotnevi elatior W.A. Lindholm, 1909 - syn of: Choanomphalus maacki elatior W.A. Lindholm, 1909 - (PLANORBIDAE)
- korotnevi gracilis, Korotnewia korotnevi gracilis (Kozhov, 1936) - (AMNICOLIDAE)
- korotnevi selengensis, Korotnewia korotnevi selengensis (Kozhov, 1936) - (AMNICOLIDAE)
- Korotnewia, Genus Korotnewia Kozhov, 1936 (AMNICOLIDAE)
- korotniewi minutum, Pisidium korotniewi minutum Kozhov, 1936 - syn of: Pisidium minutum (Kozhov, 1936) - (SPHAERIIDAE)
- korotniewii, Sphaerium korotniewii (W. Dybowski, 1902) - (SPHAERIIDAE)
- Korovina, syn of: Genus Megalomphalus Š. Brusina, 1871 (VANIKORIDAE)
- korphys, Acteon korphys J. Gardner, 1937 † - (ACTEONIDAE) (FOSSIL)
- korsakovi, Malletia korsakovi Krishtofovich, 1964 † - (MALLETIIDAE) (FOSSIL)
- korschinskii, Parmacella korschinskii H.R. Simroth, 1901 - (PARMACELLIDAE)
- korshinskii, Buliminus korshinskii W.A. Lindholm, 1922 - syn of: Pseudonapaeus sogdianus (E.C. Von Martens, 1874) - (ENIDAE)
- korthionense, Deroceras korthionense A.J. de Winter & L.J.M. Butot, 1985 - (AGRIOLIMACIDAE)
- koruahina, Pisinna koruahina (C.R. Laws, 1940 †) - (ANABATHRIDAE) (FOSSIL)
- koruahina, Turbonilla koruahina C.R. Laws, 1937 † - (PYRAMIDELLIDAE) (FOSSIL)
- koruahina, Rissoina koruahina C.R. Laws, 1940 † - (RISSOINIDAE) (FOSSIL)
- koruahina, Sinezona koruahina (C.R. Laws, 1936 †) - (SCISSURELLIDAE) (FOSSIL)
- koruahinensis, Penion koruahinensis (J.A. Bartrum & Powell, 1928 †) - (BUCCINIDAE) (FOSSIL)
- koruahinensis, Pleuromeris koruahinensis (J.A. Bartrum & Powell, 1928 †) - (CARDITIDAE) (FOSSIL)
- koruahinensis, Splendrillia koruahinensis (J.A. Bartrum & Powell, 1928 †) - (DRILLIIDAE) (FOSSIL)
- korulkense, Liroceras korulkense (Y.M. Yakovlev, 1899 †) - (LIROCERATIDAE) (FOSSIL)
- korycanensis, Palaeocypraea korycanensis Weinzettl, 1910 † - (CYPRAEIDAE) (FOSSIL)
- Korythoceras, Genus Korythoceras Buckman, 1920 † (CARDIOCERATIDAE) (FOSSIL)
- korytnicensis, Nassarius korytnicensis (W. Baluk, 1995 †) - (NASSARIIDAE) (FOSSIL)
- koryusyoensis, Cylichna koryusyoensis S. Nomura, 1935 - syn of: Cylichna biplicata (A. Adams in G.B. Sowerby, 1850) - (CYLICHNIDAE)
- korzchi, Menuthionautilus korzchi Kiparisova, 1960 † - (GRYPOCERATIDAE) (FOSSIL)
- kosakai, Hemiphaedusa ooi kosakai J.T. Kuroda, 1941 - (CLAUSILIIDAE)
- kosanini, Viviparus kosanini P.S. Pavlovic, 1932 † - (VIVIPARIDAE) (FOSSIL)
- koschanum, Deroceras koschanum (H.R. Simroth, 1904) - (AGRIOLIMACIDAE)
- kosciusko, Pisidium kosciusko (T. Iredale, 1943) - (SPHAERIIDAE)
- kosensis, Bythinella kosensis H. Schütt, 1980 - (BYTHINELLIDAE)
- kosensis, Albinaria caerulea kosensis K.L. Pfeiffer, 1955 - (CLAUSILIIDAE)
- koseretzi, Unio koseretzi C.T. Simpson, 1900 - syn of: Rhipidodonta charruana (A.V.M.D. D'Orbigny, 1835) - (UNIONIDAE)
- koseritzi, Rhinus koseritzi S. Clessin, 1888 - (SIMPULOPSIDAE)
- koseritzi, Unio koseritzi S. Clessin, 1888 - syn of: Rhipidodonta charruana (A.V.M.D. D'Orbigny, 1835) - (UNIONIDAE)
- koshibensis, Barbatia koshibensis K.M. Hatai & Nishiyama, 1952 - syn of: Didimacar tenebrica (L.A. Reeve, 1844) - (ARCIDAE)
- koshibensis, Diodora yokoyamai koshibensis Y. Otuka, 1937 - (FISSURELLIDAE)
- koshibensis, Striarca koshibensis K.M. Hatai & Nishiyama, 1952 - syn of: Didimacar tenebrica (L.A. Reeve, 1844) - (NOETIIDAE)
- koshibensis, Fulgoraria koshibensis Y. Otuka, 1968 † - (VOLUTIDAE) (FOSSIL)
- koshikiana, Yaadia koshikiana Tashiro & Kano, 1989 † - (STEINMANELLIDAE) (FOSSIL)
- koshikijimana, Aegista kobensis koshikijimana H.A. Pilsbry & Y. Hirase, 1904 - (BRADYBAENIDAE)
- koshikijimana, Pliciphaedusa koshikijimana (H.A. Pilsbry, 1905) - (CLAUSILIIDAE)
- koshikijimana, Bekkochlamys koshikijimana (H.A. Pilsbry & Y. Hirase, 1904) - (HELICARIONIDAE)
- koshikijimensis, Protocardia koshikijimensis K. Amano, 1958 † - (CARDIIDAE) (FOSSIL)
- koshikinum, Buccinum koshikinum T.A. Okutani, 1988 - (BUCCINIDAE)
- koshimagani, Epitonium koshimagani (T. Nakayama, 1991) - (EPITONIIDAE)
- koshuensis, Chamalycaeus cyclophoridus koshuensis J.T. Kuroda, 1936 - (CYCLOPHORIDAE)
- koshuensis, Cyclotus taivanus koshuensis H.A. Pilsbry & Y. Hirase, 1908 - (CYCLOPHORIDAE)
- kosibayensis, Callipara aikeni kosibayensis S.G. Veldsman, 2012 - (VOLUTIDAE)
- kosibensis, Psephaea kosibensis Y. Otuka, 1949 † - (VOLUTIDAE) (FOSSIL)
- Kosicia, Subgenus Chilostoma (Kosicia) Š. Brusina, 1904 (HELICIDAE)
- kosiensis, Gyraulus kosiensis P. Glöer & U. Bössneck, 2013 - (PLANORBIDAE)
- Koskinakra, Genus Koskinakra Kadolsky, 2016 † (RISSOIDAE) (FOSSIL)
- koskinensis, Albinaria brevicollis koskinensis (C. Pollonera, 1916) - (CLAUSILIIDAE)
- koskinum, Opalia koskinum (C. Hedley, 1909) - (EPITONIIDAE)
- koslinskyi, Theodoxus koslinskyi (Porumbaru, 1881 †) - (NERITIDAE) (FOSSIL)
- kosmai, Cosmocerithium kosmai A. Kaim, 2004 † - (PROCERITHIIDAE) (FOSSIL)
- kosmajae, Anodomaria kosmajae Ayoub-Hannaa & al., 2015 † - (PLEUROTOMARIIDAE) (FOSSIL)
- kosmasi, Balbiniconcha kosmasi Horný, 1992 † - (SUBULITIDAE) (FOSSIL)
- Kosmermoceras, Genus Kosmermoceras † (STEPHANOCERATIDAE) (FOSSIL)
- Kosmetopoma, Subgenus Sulfurina (Kosmetopoma) A. Wagner, 1905 (HELICINIDAE)
- Kosmoceras, Genus Kosmoceras Sowerby, 1816 † (KOSMOCERATIDAE) (FOSSIL)
- KOSMOCERATIDAE Haug, 1887 † - Family (CEPHALOPODA-AMMONOIDEA [Subclass]-AMMONITIDA [Order]-STEPHANOCERATOIDEA [Superfamily]) (FOSSIL)
- Kosmoclymenia, Genus Kosmoclymenia Schindewolf , 1949 † (KOSMOCLYMENIIDAE) (FOSSIL)
- KOSMOCLYMENIIDAE Korn & Price, 1987 † - Family (CEPHALOPODA-AMMONOIDEA [Subclass]-CLYMENIIDA [Order]-CLYMENIOIDEA [Superfamily]) (FOSSIL)
- Kosmolamellotis, Genus Kosmolamellotis Horvath, 1966 † (LAMELLOTIDAE) (FOSSIL)
- Kosmopleura, Genus Kosmopleura Gründel , 2003 † (CRYPTAULACIDAE) (FOSSIL)
- Kosorodiscus, Genus Kosorodiscus Horný, 2005 † (TROPIDODISCIDAE) (FOSSIL)
- kosovensis, Boiotremus kosovensis Horný, 1963 † - (BUCANIIDAE) (FOSSIL)
- kosovensis, Gyraulus kosovensis (P.S. Pavlovic, 1903) - (PLANORBIDAE)
- Kosovia, Genus Kosovia Atanackovic, 1959 † (VIVIPARIDAE) (FOSSIL)
- kosoviana, Emmericia kosoviana P.S. Pavlovic, 1903 † - syn of: Choerina kosoviana (P.S. Pavlovic, 1903 †) - (AMNICOLIDAE) (FOSSIL)
- kosoviana, Choerina kosoviana (P.S. Pavlovic, 1903 †) - (RISSOOIDEA (UNASSIGNED)) (FOSSIL)
- kosovica, Terranigra kosovica P. Radoman, 1978 - (HYDROBIIDAE)
- kosoviensis, Sluha kosoviensis Barrande, 1881 † - (MALLETIIDAE) (FOSSIL)
- Kosovina, Genus Kosovina Horný , 2004 † (TRYBLIDIIDAE) (FOSSIL)
- Kosovoceras, Subgenus Lechritrochoceras (Kosovoceras) Turek, 1975 † (LECHRITROCHOCERATIDAE) (FOSSIL)
- kosovoensis, Monachoides kosovoensis A.J. de Winter & W.J.M. Maassen, 1992 - (HYGROMIIDAE)
- kosslerae, Bedeva kosslerae C. Nielsen, 2003 † - (MURICIDAE) (FOSSIL)
- kossmanni, Pisania kossmanni A. Pagenstecher, 1877 - syn of: Nassa situla (L.A. Reeve, 1846) - (BUCCINIDAE)
- Kossmatella, Genus Kossmatella Kossmatella † (TETRAGONITIDAE) (FOSSIL)
- kossmati, Baculites kossmati Nowak, 1908 † - syn of: Sciponoceras gracile (Shumard, 1860 †) - (BACULITIDAE) (FOSSIL)
- kossmati, Cymatoceras kossmati L. Spengler, 1910 † - (CYMATOCERATIDAE) (FOSSIL)
- kossmati, Pachydesmoceras kossmati E. Matsumoto, 1987 † - (DESMOCERATIDAE) (FOSSIL)
- kossmati, Brahmaites kossmati Henderson & McNamara, 1985 † - (KOSSMATICERATIDAE) (FOSSIL)
- kossmati, Hedenstroemia kossmati (A. Hyatt & Smith, 1905 †) - (LANCEOLITIDAE) (FOSSIL)
- kossmati, Vascoceras kossmati Choffat, 1898 † - (VASCOCERATIDAE) (FOSSIL)
- Kossmatia, syn of: Genus Romaniceras Spath , 1923 † (ACANTHOCERATIDAE) (FOSSIL)
- Kossmaticeras, Genus Kossmaticeras de Grossouvre, 1901 † (KOSSMATICERATIDAE) (FOSSIL)
- KOSSMATICERATIDAE Spath, 1922 † - Family (CEPHALOPODA-AMMONOIDEA [Subclass]-AMMONITIDA [Order]-DESMOCERATOIDEA [Superfamily]) (FOSSIL)
- kossovajae, Novlepatella kossovajae Mazaev, 2015 † - (DAMILINIDAE) (FOSSIL)
- kosswae, Pseudotemnocheilus kosswae (N.D. Kruglov, 1928 †) - (TAINOCERATIDAE) (FOSSIL)
- kostali, Limax kostali J.F. Babor, 1893 - (LIMACIDAE)
- kostanjevicae, Paladilhiopsis robiciana kostanjevicae (H. Schütt, 1970) - (MOITESSIERIIDAE)
- kosteri, Tryonia kosteri D.W. Taylor, 1987 - (COCHLIOPIDAE)
- kostini, Embrikena kostini R.M. Filmer, A. Monteiro & al., 2012 - (CONIDAE)
- kostini, Zoila friendii kostini F.Jr. Lorenz & M. Chiapponi, 2007 - (CYPRAEIDAE)
- kostini, Empressostrea kostini M. Huber & F.Jr. Lorenz, 2007 - (GRYPHAEIDAE)
- kostromensis, Brachytrema kostromensis Gerasimov, 1955 † - syn of: Maturifusus kostromensis (Gerasimov, 1955 †) - (BRACHYTREMATIDAE) (FOSSIL)
- kostromensis, Maturifusus kostromensis (Gerasimov, 1955 †) - (PSEUDOTRITONIIDAE) (FOSSIL)
- kostromensis, Astandes kostromensis Gerasimov, 1955 † - syn of: Maturifusus kostromensis (Gerasimov, 1955 †) - (PSEUDOTRITONIIDAE) (FOSSIL)
- kosugei, Pararetifusus kosugei A. Kosyan, 2006 - (BUCCINIDAE)
- kosugei, Xastilia kosugei P. Bouchet & R. Houart, 1994 - (MURICIDAE)
- kosugei, Diminovula kosugei (C.N. Cate, 1973) - (OVULIDAE)
- kosugei, Euthymella kosugei B.A. Marshall, 1983 - (TRIPHORIDAE)
- kosugei, Viriola kosugei C.K. Chang & Wu, 2005 - (TRIPHORIDAE)
- kosunorum, Enixotrophon kosunorum (R. Houart & T.C. Lan, 2003) - (MURICIDAE)
- koswensis, Hoeninghausia koswensis Bogoslovsky, 1969 † - (KOENENITIDAE) (FOSSIL)
- kosynskyi, Anuites kosynskyi Andrianov, 1985 † - (SPIROLEGOCERATIDAE) (FOSSIL)
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