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aberrata, Nototrigonia aberrata Skwarko, 1963 † (FOSSIL)
acarinata, Quadratojaworskiella acarinata Pérez & al., 2008 † (FOSSIL)
aclinisa, Trigonia aclinisa Dickan, 1990 † (FOSSIL)
acuticostata, Neotrigonia acuticostata (McCoy, 1866) † (FOSSIL)
affinis, Trigonia affinis Sowerby, 1818 † - syn of: Lycettitrigonia affinis (Sowerby, 1818) † (FOSSIL)
agrioensis, Trigonia agrioensis Weaver, 1931 † - syn of: Tanzanitrigonia agrioensis (Weaver, 1931) † (FOSSIL)
alemanica, Trigonia alemanica (Rollier, 1912) † (FOSSIL)
alsatica, Trigonia alsatica (Rollier, 1912) † (FOSSIL)
alta, Guineana alta (Gabb, 1864) † (FOSSIL)
analoga, Trigonia analoga Douvillé, 1916 † - syn of: Lycettitrigonia analoga (Douvillé, 1916) † (FOSSIL)
andrussovi, Trigonia andrussovi Saveliev, 1960 † (FOSSIL)
angustata, Trigonia elongata angustata Lycett (FOSSIL)
angustecostata, Trigonia angustecostata Behrendsen, 1892 † (FOSSIL)
antarctica, Trigonia antarctica Péron & Lesueur, 1807 - syn of: Neotrigonia margaritacea (Lamarck, 1804)
antiqua, Trigonia antiqua D'Orbigny, 1842 † (FOSSIL)
arduennensis, Trigonia arduennensis (Rollier, 1912) † (FOSSIL)
areafurcata, Trigonia areafurcata Vetters, 1905 † (FOSSIL)
aylesburiensis, Trigonia aylesburiensis Cox † (FOSSIL)
bajarunasi, Trigonia bajarunasi Saveliev, 1960 † (FOSSIL)
bathurstensis, Actinotrigonia bathurstensis Cox, 1964 † (FOSSIL)
bednalli, Neotrigonia bednalli (Verco, 1907)
beesleyana, Psilotrigonia beesleyana (Lycett, 1874) † (FOSSIL)
bella, Trigonia bella Lycett, 1877 † (FOSSIL)
beringica, Maoritrigonia beringica Bychkov, 1985 † (FOSSIL)
beyschlagi, Indotrigonia beyschlagi (G. Müller, 1900) † (FOSSIL)
boloniensis, Trigonia boloniensis De Loriol, 1866 † - syn of: Lycettitrigonia boloniensis (De Loriol, 1866) † (FOSSIL)
brendae, Vanhoepenella brendae M.R. Cooper, 2016 † (FOSSIL)
brevicostata, Trigonia brevicostata Kitchin, 1903 † (FOSSIL)
buckmani, Trigonia buckmani Cox. † (FOSSIL)
burckhardti, Jaworskiella burckhardti (Jaworski, 1916) † (FOSSIL)
calderoni, Trigonia calderoni Castillo & Aguilera † - syn of: Heterotrigonia calderoni (Castillo & Aguilera) † (FOSSIL)
campbellorum, Heslingtonia campbellorum Fleming, 1987 † (FOSSIL)
canadensis, Psilotrigonia canadensis Poulton, 1976 † (FOSSIL)
cardiniiformis, Eselaevitrigonia cardiniiformis (Kitchin, 1903) † (FOSSIL)
carinata, Trigonia carinata Agassiz, 1840 † (FOSSIL)
cassiope, Trigonia cassiope Lycett ex d'Orbigny † (FOSSIL)
castani, Trigonia castani Henry, 1876 † (FOSSIL)
castrovillensis, Trigonia castrovillensis Stephenson, 1941 † (FOSSIL)
charlockensis, Trigonia charlockensis Kellaway & Wilson † (FOSSIL)
chekhovi, Maoritrigonia chekhovi Bychkov, 1985 † (FOSSIL)
collignoni, Malagasitrigonia collignoni (Cox, 1964) † (FOSSIL)
columbiana, Maoritrigonia columbiana (McLearn, 1942) † (FOSSIL)
conferticostata, Trigonia conferticostata Cragin, 1905 † (FOSSIL)
convexa, Geratrigonia convexa (Kobayashi, 1954) † (FOSSIL)
convexa, Nipponitrigonia convexa Kobayashi, 1957 † (FOSSIL)
coquandiana, Trigonia coquandiana D'Orbigny, 1844 † - syn of: Lycettitrigonia coquandiana (D'Orbigny, 1844) † (FOSSIL)
coqueiroensis, Trigonia coqueiroensis Maury, 1936 † (FOSSIL)
corderoi, Trigonia corderoi Lambert, 1944 † (FOSSIL)
costata, Trigonia costata Parkinson, 1811 † (FOSSIL)
costata lata, Trigonia costata lata Lycett † (FOSSIL)
coxi, Kupenga coxi (Fleming, 1985) † (FOSSIL)
cragini, Trigonia cragini Stoyanow, 1949 † (FOSSIL)
crebraecostata, Trigonia crebraecostata Pugaczewska, 1976 † (FOSSIL)
crenulata, Trigonia crenulata Lamarck, 1819 † (FOSSIL)
crenulifera, Trigonia crenulifera Lycett † (FOSSIL)
culleni, Trigonia culleni Lycett, 1877 † (FOSSIL)
curta, Opisthotrigonia curta (Aitken, 1961) † (FOSSIL)
curvata, Opisthotrigonia curvata Aitken, 1961 † (FOSSIL)
dailyi, Climacotrigonia dailyi Cox, 1964 † (FOSSIL)
debilis, Trigonia debilis Lycett, 1877 † - syn of: Lycettitrigonia debilis (Lycett, 1877) † (FOSSIL)
densestriata, Trigonia densestriata Behrendsen, 1892 † (FOSSIL)
denticulata, Trigonia denticulata Agassiz, 1840 † (FOSSIL)
depauperata, Trigonia depauperata Douvillé, 1916 † - syn of: Lycettitrigonia depauperata (Douvillé, 1916) † (FOSSIL)
dhosaensis, Trigonia dhosaensis Kitchin, 1903 † (FOSSIL)
distincta, Coxitrigonia distincta (Kitchin, 1903) † (FOSSIL)
diversicostata, Trigonia diversicostata Whiteaves, 1876 † - syn of: Heterotrigonia diversicostata (Whiteaves, 1876) † (FOSSIL)
dubia, Trigonia dubia Kitchin, 1903 † - syn of: Mayesella dubia (Kitchin, 1903) † (FOSSIL)
dunscombensis, Trigonia dunscombensis Lycett, 1877 † - syn of: Lycettitrigonia dunscombensis (Lycett, 1877) † (FOSSIL)
ehningensis, Trigonia ehningensis (Rollier, 1912) † (FOSSIL)
elongata, Trigonia elongata Sowerby, 1823 † (FOSSIL)
elongata angustata, Trigonia elongata angustata Lycett † (FOSSIL)
elongata gracilis, Trigonia elongata gracilis Kellaway & Wilson † (FOSSIL)
emmerichii, Guineana emmerichii (Winkler, 1859) † (FOSSIL)
eocenica, Eotrigonia eocenica Darragh, 1986 † (FOSSIL)
eptingensis, Trigonia eptingensis Schwarz, 1973 † (FOSSIL)
erbeni, Trigonia erbeni Alencaster de Cserna, 1963 † (FOSSIL)
eufaulensis, Trigonia eufaulensis Gabb, 1860 † - syn of: Scabrotrigonia eufaulensis (Gabb, 1860) † (FOSSIL)
eufaulensis gabbi, Trigonia eufaulensis gabbi Stephenson, 1941 † - syn of: Scabrotrigonia eufaulensis gabbi (Stephenson, 1941) † (FOSSIL)
eufaulensis moorei, Trigonia eufaulensis moorei Stephenson, 1941 † - syn of: Scabrotrigonia eufaulensis moorei (Stephenson, 1941) † (FOSSIL)
extentum, Trigonia extentum Repman, 1963 † (FOSSIL)
falcki, Trigonia falcki Rouillier & Vosinsky, 1849 † - syn of: Mayesella falcki (Rouillier & Vosinsky, 1894) † (FOSSIL)
fluehmanni, Trigonia fluehmanni Philippi, 1899 † (FOSSIL)
fortinensis, Trigonia fortinensis Lambert, 1944 † (FOSSIL)
gallica, Trigonia gallica (Rollier, 1912) † (FOSSIL)
gemma, Neotrigonia gemma Iredale, 1924
glosensis, Trigonia glosensis Bigot, 1893 † (FOSSIL)
glyptica, Trigonia glyptica Woods, 1917 † - syn of: Iotrigonia glyptica (Woods, 1917) † (FOSSIL)
gracilis, Trigonia elongata gracilis Kellaway & Wilson (FOSSIL)
granosa, Eotrigonia semiundulata granosa Pritchard (FOSSIL)
gryphitica, Jaworskiella gryphitica (Möricke, 1894) † (FOSSIL)
guildi, Trigonia guildi Stoyanow, 1949 † (FOSSIL)
guisei, Trigonia guisei Lycett, 1883 † (FOSSIL)
hachibarensis, Kyushutrigonia hachibarensis Tamura & Nishimura, 1994 † (FOSSIL)
hanetiana, Pacitrigonia hanetiana (D'Orbigny, 1842) † (FOSSIL)
hanetiana hectori, Pacitrigonia hanetiana hectori Fleming, 1987 † (FOSSIL)
harpa, Trigonia harpa Munster, 1837 † - syn of: Myophoria harpa (Munster, 1837) † (FOSSIL)
hauchecornei, Trigonia hauchecornei Schmidt, 1905 † - syn of: Tamaragonia hauchecornei (Schmidt, 1905) † (FOSSIL)
hectori, Pacitrigonia hanetiana hectori Fleming (FOSSIL)
hemisphaerica, Trigonia hemisphaerica Lycett, 1877 † (FOSSIL)
heva, Trigonia heva Dollfuss, 1863 † (FOSSIL)
horia, Neotrigonia horia Cotton, 1953 - syn of: Neotrigonia bednalli (Verco, 1907)
horii, Latitrigonia horii Maeda, 1963 † (FOSSIL)
hosourensis, Geratrigonia hosourensis (Yokoyama, 1904) † (FOSSIL)
hosourensis convexa, Geratrigonia hosourensis convexa Kobayashi, 1954 † - syn of: Geratrigonia convexa (Kobayashi, 1954) † (FOSSIL)
hudlestoni, Trigonia hudlestoni Lycett, 1877 † (FOSSIL)
huenickeni, Neuquenitrigonia huenickeni (Leanza & Garate, 1985) † (FOSSIL)
imbricata, Trigonia imbricata Sowerby, 1826 † (FOSSIL)
inexspectata, Frenguelliella inexspectata (Jaworski, 1916) † (FOSSIL)
infracostata, Trigonia infracostata Lycett, 1881 † (FOSSIL)
ingens, Trigonia ingens Lycett † (FOSSIL)
interlaevigata, Trigonia interlaevigata Quenstedt, 1858 † (FOSSIL)
intersitans, Trigonia intersitans Tate, 1896 † (FOSSIL)
jacksoni, Neotrigonia jacksoni Morrison, 2011
jacobseni, Pleurotrigonia jacobseni Cooper, 2016 † (FOSSIL)
japonica, Trigonia japonica Yehara, 1923 † - syn of: Yeharella japonica (Yehara, 1923) † (FOSSIL)
jaworskii, Myophorigonia jaworskii (Steinmann, 1929) † (FOSSIL)
jimiensis, Guineana jimiensis Skwarko, 1967 † (FOSSIL)
jukesii, Neotrigonia jukesii Adams, 1850 - syn of: Neotrigonia uniophora (Gray, 1847)
kaiyomaruae, Neotrigonia kaiyomaruae Habe, 1976
kasaii, Latitrigonia kasaii Maeda, 1963 † (FOSSIL)
katrolensis, Indotrigonia katrolensis Agrawal, 1956 † (FOSSIL)
kawhiana, Trigonia kawhiana Trechmann, 1923 † - syn of: Vaugonia kawhiana (Trechmann, 1923) † (FOSSIL)
kikuchiana, Nipponitrigonia kikuchiana (Yokoyama, 1891) † (FOSSIL)
kitchini, Trigonia kitchini Stoyanow, 1949 † (FOSSIL)
kobayashii, Myophorigonia kobayashii Tamura & McRoberts, 1993 † (FOSSIL)
kurumensis, Geratrigonia kurumensis Kobayashi, 1957 † (FOSSIL)
laeviuscula, Trigonia laeviuscula Lycett, 1875 † - syn of: Lycettitrigonia laeviuscula (Lycett, 1875) † (FOSSIL)
lajoyei, Trigonia lajoyei Deshayes, 1842 † - syn of: Lycettitrigonia longa (Agassiz, 1840) † (FOSSIL)
lamarckii, Neotrigonia lamarckii (Gray, 1838)
lamarckii reticulata, Neotrigonia lamarckii reticulata Tenison-Woods, 1878 - syn of: Neotrigonia gemma Iredale, 1924
langrunensis, Trigonia langrunensis Bigot, 1893 † (FOSSIL)
lata, Geratrigonia lata Kobayashi, 1954 † (FOSSIL)
lata, Trigonia costata lata Lycett (FOSSIL)
latiarealis, Trigonia latiarealis Saveliev, 1960 † (FOSSIL)
laufonensis, Trigonia laufonensis (Rollier, 1912) † (FOSSIL)
leckenbyi, Trigonia leckenbyi Lycett † (FOSSIL)
leedae, Maoritrigonia leedae Fleming, 1987 † (FOSSIL)
levyi, Trigonia levyi Leanza, 1993 † (FOSSIL)
libanensis, Trigonia libanensis Krumbeck, 1905 † (FOSSIL)
lineolata, Trigonia lineolata Agassiz, 1840 † (FOSSIL)
longa, Trigonia longa Agassiz, 1840 † - syn of: Lycettitrigonia longa (Agassiz, 1840) † (FOSSIL)
losadai, Trigonia losadai Leanza, 1993 † (FOSSIL)
lutosa, Eotrigonia semiundulata lutosa Pritchard (FOSSIL)
lycetti, Trigonia lycetti Walford, 1885 † (FOSSIL)
maastrichtiana, Trigonia maastrichtiana Briart, 1888 † (FOSSIL)
macdonaldi, Eselaevitrigonia macdonaldi Kelly, 1995 † (FOSSIL)
macfarlani, Malagasitrigonia macfarlani Fleming, 1987 † (FOSSIL)
maloneana, Trigonia maloneana Stoyanow, 1949 † (FOSSIL)
maltonensis, Trigonia maltonensis Arkell † (FOSSIL)
margaritacea, Neotrigonia margaritacea (Lamarck, 1804)
margaritacea, Trigonia margaritacea Bednall, 1878 - syn of: Neotrigonia bednalli (Verco, 1907)
margaritacea, Neotrigonia margaritacea Bednall, 1878 - syn of: Neotrigonia bednalli (Verco, 1907)
margaritacea, Trigonia margaritacea Lamarck, 1804 - syn of: Neotrigonia margaritacea (Lamarck, 1804)
margaritacea bednalli, Neotrigonia margaritacea bednalli Verco, 1907 - syn of: Neotrigonia bednalli (Verco, 1907)
margaritacea bednalli, Trigonia margaritacea bednalli Verco, 1907 - syn of: Neotrigonia bednalli (Verco, 1907)
margaritacea uniophora, Neotrigonia margaritacea uniophora Gray, 1847 - syn of: Neotrigonia uniophora (Gray, 1847)
marginata, Trigonia marginata Damon, 1860 † (FOSSIL)
marwicki, Trigonia marwicki Fleming, 1987 † (FOSSIL)
matapuana, Indotrigonia matapuana (Krenkel, 1911) † (FOSSIL)
mearnsi, Trigonia mearnsi Stoyanow, 1949 † (FOSSIL)
medipontea, Neotrigonia medipontea Darragh, 1986 † (FOSSIL)
meridiana, Eselaevitrigonia meridiana (Woods, 1917) † (FOSSIL)
micippe, Trigonia micippe Philippi, 1899 † (FOSSIL)
micrasiatica, Guineana micrasiatica (Bittner, 1891) † (FOSSIL)
mirandaensis, Trigonia mirandaensis Lambert, 1944 † (FOSSIL)
mollesensis, Trigonia mollesensis Lambert, 1944 † (FOSSIL)
mollesensis, Maoritrigonia mollesensis Pérez & Reyes, 1994 † (FOSSIL)
montanaensis, Trigonia montanaensis (Meek, 1873) † (FOSSIL)
moorei, Coxitrigonia moorei (Lycett, 1870) † (FOSSIL)
multicostata, Minetrigonia multicostata (Korner, 1937) † (FOSSIL)
munita, Trigonia munita Cragin, 1905 † (FOSSIL)
nasuta, Neopisthotrigonia nasuta (Etheridge, 1872) † (FOSSIL)
nemtinovi, Kumatrigonia nemtinovi Bychkov, 1985 † (FOSSIL)
newtonae, Minetrigonia newtonae McRoberts, 2017 † (FOSSIL)
nobilis, Trigonia nobilis Adams, 1854 - syn of: Neotrigonia margaritacea (Lamarck, 1804)
northamptonensis, Trigonia northamptonensis Walford, 1885 † (FOSSIL)
novaguineana, Neotrigonia novaguineana Skwarko, 1967 † (FOSSIL)
nuggetensis, Maoritrigonia nuggetensis (Trechmann, 1918) † (FOSSIL)
oehlerti, Trigonia oehlerti Bigot, 1893 † (FOSSIL)
offsetensis, Callitrigonia offsetensis Kelly, 1995 † (FOSSIL)
oliveroi, Austrotrigonia oliveroi Medina, 1980 † (FOSSIL)
orbicularis, Latitrigonia orbicularis Kobayashi, 1957 † (FOSSIL)
orbicularis, Lyrioschizodus orbicularis Newell & Boyd, 1975 † - syn of: Lyroschizodus orbicularis (Newell & Boyd, 1975) † (FOSSIL)
orientalis, Trigonia orientalis Douvillé, 1916 † (FOSSIL)
orientalis, Trigonia orientalis Forbes, 1846 † (FOSSIL)
otamitensis, Maoritrigonia otamitensis (Trechmann, 1918) † (FOSSIL)
packardi, Trigonia packardi Anderson, 1958 † - syn of: Apiotrigonia condoni (Packard, 1921) † (FOSSIL)
paleocenica, Eotrigonia paleocenica Darragh, 1986 † (FOSSIL)
pampeana, Austrotrigonia pampeana Leanza & Casadío, 1991 † (FOSSIL)
papuana, Trigonia papuana Glaessner, 1958 † (FOSSIL)
parva, Myophorigonia parva McRoberts, 2017 † (FOSSIL)
patchamensis, Trigonia patchamensis Fürsich & Heinze, 1998 † (FOSSIL)
pcelincevae, Trigonia pcelincevae Saveliev, 1960 † (FOSSIL)
pectinata, Trigonia pectinata Lamarck, 1819 - syn of: Neotrigonia margaritacea (Lamarck, 1804)
perezreyesi, Frenguelliella perezreyesi Leanza, 1993 † (FOSSIL)
pichimoncolensis, Lambertitrigonia pichimoncolensis (Lambert, 1944) † (FOSSIL)
picteti, Trigonia picteti Coquand, 1865 † (FOSSIL)
pirouteti, Maoritrigonia pirouteti (Avias, 1953) † (FOSSIL)
plana, Trigonia plana Repin, 2013 † (FOSSIL)
plazaensis, Neuquenitrigonia plazaensis Pérez & al., 2008 † (FOSSIL)
postera, Guineana postera (Quenstedt, 1857) † (FOSSIL)
poultoni, Frenguelliella poultoni Leanza, 1993 † (FOSSIL)
praenuntians, Pacitrigonia praenuntians Kelly, 1995 † (FOSSIL)
prima, Austrotrigonia prima Skwarko, 1963 † (FOSSIL)
pseudoacuta, Trigonia pseudoacuta Dickan, 1990 † (FOSSIL)
pseudocaudata, Trigonia pseudocaudata Hector, 1886 † (FOSSIL)
pseudocrenulata, Trigonia pseudocrenulata Notling, 1884 † - syn of: Arabitrigonia pseudocrenulata (Notling, 1884) † (FOSSIL)
pseudoexcentrica, Trigonia pseudoexcentrica Hoppe, 1922 † - syn of: Lycettitrigonia pseudoexcentrica (Hoppe, 1922) † (FOSSIL)
pseudoindica, Trigonia pseudoindica Arkhanguelsky, 1916 † - syn of: Turanigonia pseudoindica (Arkhanguelsky, 1916) † (FOSSIL)
pseudomeriani, Trigonia pseudomeriani Choffat, 1885 † (FOSSIL)
pseudopapillata, Trigonia pseudopapillata Dickan, 1990 † (FOSSIL)
pullus, Trigonia pullus Sowerby, 1826 † (FOSSIL)
pustulata, Quadratojaworskiella pustulata Reyes & Perez, 1980 † (FOSSIL)
pyramidalis, Latitrigonia pyramidalis Kobayashi & Tamura, 1957 † (FOSSIL)
rebouli, Trigonia rebouli Henry, 1876 † (FOSSIL)
reesidei, Trigonia reesidei Stoyanow, 1949 † (FOSSIL)
regina, Eselaevitrigonia regina (Wilckens, 1910) † (FOSSIL)
resoluta, Trigonia resoluta Stoyanow, 1949 † (FOSSIL)
reticulata, Trigonia reticulata Agassiz, 1841 † (FOSSIL)
retrorsa, Opisthotrigonia retrorsa (Kitchin, 1903) † (FOSSIL)
roperi, Neopisthotrigonia roperi (Skwarko, 1963) † (FOSSIL)
rudicostata, Trigonia rudicostata Cragin, 1905 † (FOSSIL)
rugosicostata, Trigonia rugosicostata Saveliev, 1960 † (FOSSIL)
saavedra, Trigonia saavedra Stoyanow, 1949 † (FOSSIL)
sakamotoensis, Nipponitrigonia sakamotoensis (Yehara, 1921) † (FOSSIL)
salasi, Myophorigonia salasi Alencaster, 1961 † (FOSSIL)
sanctaecrucis, Trigonia sanctaecrucis Pictet & Campiche, 1866 † - syn of: Lycettitrigonia sanctaecrucis (Pictet & Campiche, 1866) † (FOSSIL)
sawatai, Trigonia sawatai Yehara, 1923 † - syn of: Apiotrigonia jimboi Nakano, 1957 † (FOSSIL)
scabricola, Trigonia scabricola (Lycett) † (FOSSIL)
scapha, Trigonia scapha Agassiz, 1840 † (FOSSIL)
semiculta, Trigonia semiculta Forbes, 1845 † - syn of: Lycettitrigonia semiculta (Forbes, 1846) † (FOSSIL)
semiundulata, Eotrigonia semiundulata (Jenkins, 1865) † (FOSSIL)
semiundulata granosa, Eotrigonia semiundulata granosa (Pritchard, 1903) † (FOSSIL)
semiundulata lutosa, Eotrigonia semiundulata lutosa (Pritchard, 1903) † (FOSSIL)
senex, Trigonia senex Kobayashi & Mori, 1954 † (FOSSIL)
siemonmulleri, Jaworskiella siemonmulleri Poulton, 1979 † (FOSSIL)
signicollina, Trigonia signicollina Fleming, 1987 † (FOSSIL)
similis, Trigonia similis Agassiz, 1840 † (FOSSIL)
smeeii, Indotrigonia smeeii (J. de C. Sowerby, 1840) † (FOSSIL)
somaliensis, Trigonia somaliensis Stefanini, 1939 † (FOSSIL)
sparsicostata, Maoritrigonia sparsicostata Pérez & Reyes, 1994 † (FOSSIL)
spissicostata, Ghuneriella spissicostata (Kitchin, 1903) † (FOSSIL)
stantoni, Trigonia stantoni Stephenson, 1941 † (FOSSIL)
stelzneri, Trigonia stelzneri Gottsche, 1878 † (FOSSIL)
stolleyi, Trigonia stolleyi Hill, 1893 † (FOSSIL)
strangei, Neotrigonia strangei (Adams, 1854)
suborbicularis, Trigonia suborbicularis Forbes, 1846 † (FOSSIL)
subovalis, Trigonia subovalis Jimbo, 1894 † - syn of: Apiotrigonia jimboi Nakano, 1957 † (FOSSIL)
subovalis minor, Trigonia subovalis minor Amano, 1957 † - syn of: Nuraya amanoi (Nakano, 1958) † (FOSSIL)
subtriangularis, Trigonia subtriangularis Wetzel, 1911 † (FOSSIL)
sulcata, Trigonia sulcata (Hermann, 1781) † (FOSSIL)
sulcata, Trigonia sulcata Hector, 1874 † (FOSSIL)
sulcataria, Trigonia sulcataria Lamarck, 1819 † - syn of: Apiotrigonia sulcataria (Lamarck, 1819) † (FOSSIL)
sulcifera, Trigonia sulcifera Philippi, 1899 † (FOSSIL)
sumiyagura, Trigonia sumiyagura Kobayashi & Kaseno, 1947 † (FOSSIL)
supleiensis, Jaworskiella supleiensis Poulton, 1979 † (FOSSIL)
suprajurensis, Trigonia suprajurensis Agassiz, 1840 † (FOSSIL)
suttonensis, Minetrigonia suttonensis (Clapp & Shimer, 1911) † (FOSSIL)
sydariensis, Trigonia sydariensis Archangelski , 1916 † - syn of: Rutitrigonia sydariensis (Archangelski , 1916) † (FOSSIL)
sylvesteri, Pacitrigonia sylvesteri Marwick, 1932 † (FOSSIL)
taffi, Trigonia taffi Cragin, 1893 † (FOSSIL)
tanourensis, Kumatrigonia tanourensis (Tamura, 1959) † (FOSSIL)
tapiai, Frenguelliella tapiai Lambert, 1944 † (FOSSIL)
tarameahensis, Mesotrigonia tarameahensis Freneix, 1958 † (FOSSIL)
tatei, Trigonia tatei Pritchard, 1895 † - syn of: Trigonia intersitans Tate, 1896 † (FOSSIL)
tealbyensis, Trigonia tealbyensis Lycett † (FOSSIL)
tealei, Coxitrigonia tealei (Cox, 1937) † (FOSSIL)
tenuicosta, Trigonia tenuicosta Lycett † (FOSSIL)
tepsikhaensis, Trigonia tepsikhaensis Bogdanova & Yanin, 2005 † (FOSSIL)
tetoriensis, Latitrigonia tetoriensis Kobayashi, 1957 † (FOSSIL)
thetis, Trigonia thetis Philippi, 1899 † (FOSSIL)
thierachensis, Trigonia thierachensis Fischer, 1969 † (FOSSIL)
thoracica, Trigonia thoracica Morton, 1834 † - syn of: Scabrotrigonia thoracica (Morton, 1834) † (FOSSIL)
transitoria, Trigonia transitoria Steinmann, 1881 † (FOSSIL)
trapeziformis, Kitchingonia trapeziformis (Kitchin, 1903) † (FOSSIL)
trechmanni, Maoritrigonia trechmanni Fleming, 1987 † (FOSSIL)
tuarensis, Trigonia tuarensis Saveliev, 1960 † (FOSSIL)
tubulifera, Eotrigonia tubulifera (Tate, 1885) † (FOSSIL)
tubulifera, Trigonia tubulifera Tate, 1885 † - syn of: Eotrigonia tubulifera (Tate, 1885) † (FOSSIL)
turkestanensis, Trigonia turkestanensis Archangelski, 1916 † - syn of: Turkestanella turkestanensis (Archangelski, 1916) † (FOSSIL)
tyna, Eselaevitrigonia tyna Skwarko, 1981 † (FOSSIL)
undulatocostata, Trigonia undulatocostata Blanckenhorn, 1890 † - syn of: Lycettitrigonia undulatocostata (Blanckenhorn, 1890) † (FOSSIL)
unicarinata, Latitrigonia unicarinata Kobayashi & Tamura, 1957 † (FOSSIL)
uniophora, Neotrigonia uniophora (Gray, 1847)
uniophora, Trigonia uniophora Gray, 1847 - syn of: Neotrigonia uniophora (Gray, 1847)
uniophora crebrisculpta, Neotrigonia uniophora crebrisculpta Odhner, 1917 - syn of: Neotrigonia uniophora (Gray, 1847)
uniophora crebrisculpta, Trigonia uniophora crebrisculpta Odhner, 1917 - syn of: Neotrigonia uniophora (Gray, 1847)
unituberculata, Latitrigonia unituberculata Kobayashi & Tamura, 1957 † (FOSSIL)
vegaensis, Psilotrigonia vegaensis Pérez & al., 2008 † (FOSSIL)
vicaryana, Trigonia vicaryana Lycett † (FOSSIL)
vstriata, Nambangonia vstriata (Aitken, 1961) † (FOSSIL)
vyschetzkii, Trigonia vyschetzkii Cragin, 1905 † (FOSSIL)
waddicki, Maoritrigonia waddicki Fleming, 1987 † (FOSSIL)
walfordi, Trigonia walfordi Lycett, 1883 † (FOSSIL)
weaveri, Trigonia weaveri Stoyanow, 1949 † (FOSSIL)
wellmani, Eselaevitrigonia wellmani Fleming, 1987 † (FOSSIL)
wiedmanni, Trigonia wiedmanni Leanza & Garate, 1983 † (FOSSIL)
wightensis, Trigonia wightensis Strand † (FOSSIL)
windoesi, Trigonia windoesi Lycett, 1883 † (FOSSIL)
yunnanensis, Protrigonia yunnanensis (Guo Fu-xiang, 1985) † (FOSSIL)
zealandica, Psilotrigonia zealandica Fleming, 1987 † (FOSSIL)
zlambachensis, Modesticoncha zlambachensis (Haas, 1909) † (FOSSIL)
zonata, Trigonia zonata Agassiz, 1840 † (FOSSIL)
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