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abbreviata, Eoptychia abbreviata (de Koninck, 1881) † (FOSSIL)
abolescens, Plocezyga abolescens Knight, 1930 † (FOSSIL)
acuminata, Plocezyga acuminata Hoare & Sturgeon, 1980 † (FOSSIL)
acuminata, Pseudozygopleura acuminata Knight, 1930 † (FOSSIL)
affinis, Pseudozygopleura affinis Girty, 1915 † - syn of: Pseudozygopleura scitula (Meek & Worthen, 1860) † (FOSSIL)
angularis, Plocezyga angularis Knight, 1930 † (FOSSIL)
angustata, Pseudozygopleura angustata Hoare & Sturgeon, 1985 † (FOSSIL)
assertonsoris, Pseudozygopleura assertonsoris Knight, 1930 † (FOSSIL)
attenuata, Hemizyga attenuata (Hoare & Sturgeon, 1980) † (FOSSIL)
attenuata, Cyclozyga attenuata Hoare & Sturgeon, 1978 † (FOSSIL)
attenuata, Gamizyga attenuata Hoare & Sturgeon, 1980 † - syn of: Hemizyga attenuata (Hoare & Sturgeon, 1980) † (FOSSIL)
baltea, Pseudozygopleura baltea Hoare & Sturgeon, 1985 † (FOSSIL)
belli, Pseudozygopleura belli Carew, 1980 † (FOSSIL)
bilineata, Hemizyga bilineata Batten, 1966 † (FOSSIL)
cancellata, Hyphantozyga cancellata (Mark, 1912) † (FOSSIL)
carinata, Cyclozyga carinata Knight, 1930 † (FOSSIL)
carinimaxima, Eoptychia carinimaxima (Wang, 1987) † (FOSSIL)
cerithiformis, Microptychis cerithiformis (Meek & Worthen, 1860) † (FOSSIL)
charma, Levizygopleura charma Pan & Erwin, 2002 † (FOSSIL)
cirritus, Pseudozygopleura cirritus Hoare & Sturgeon, 1985 † (FOSSIL)
clathratula, Hemizyga clathratula (Young & Armstrong, 1874) † (FOSSIL)
condrai, Pseudozygopleura condrai Knight, 1930 † (FOSSIL)
conica, Plocezyga conica Hoare & Sturgeon, 1980 † (FOSSIL)
conica, Pseudozygopleura conica Knight, 1930 † (FOSSIL)
constricta, Microptychis constricta (Sowerby, 1821) † (FOSSIL)
contractus, Pseudozygopleura contractus Hoare & Sturgeon, 1981 † (FOSSIL)
convertacostata, Plocezyga convertacostata Hoare, 1961 † (FOSSIL)
convexus, Pseudozygopleura convexus Batten, 1985 † (FOSSIL)
corbis, Hemizyga corbis Knight, 1930 † (FOSSIL)
cordiformis, Plocezyga cordiformis Hoare & Sturgeon, 1980 † (FOSSIL)
corona, Plocezyga corona Knight, 1930 † (FOSSIL)
corpulentissima, Gamizyga corpulentissima (Knight, 1930) † (FOSSIL)
costata, Plocezyga costata (Mark, 1912) † (FOSSIL)
costellata, Helminthozyga costellata Hoare & Sturgeon, 1978 † (FOSSIL)
crassa, Stephanozyga crassa (Wanner, 1922) † (FOSSIL)
crenimarginis, Microptychia crenimarginis Knight, 1931 † - syn of: Platyconcha crenimarginis (Knight, 1931) † (FOSSIL)
croneisi, Pseudozygopleura croneisi Knight, 1930 † (FOSSIL)
cylindrata, Pseudozygopleura cylindrata Knight, 1930 † (FOSSIL)
decussata, Hemizyga decussata Yoo, 1988 † - syn of: Chlorozyga decussata (Yoo, 1988) † (FOSSIL)
delicata, Plocezyga delicata Hoare & Sturgeon, 1980 † (FOSSIL)
deloi, Pseudozygopleura deloi Knight, 1930 † (FOSSIL)
dubia, Hemizyga dubia Girty, 1915 † (FOSSIL)
dunbari, Pseudozygopleura dunbari Knight, 1930 † - syn of: Pseudozygopleura plummeri Knight, 1930 † (FOSSIL)
elegans, Hemizyga elegans Girty, 1915 † (FOSSIL)
elegans, Levizygopleura elegans Mazaev, 2015 † (FOSSIL)
eucharis, Pseudozygopleura eucharis Hoare, 1961 † (FOSSIL)
excellens, Plocezyga excellens Hoare & Sturgeon, 1980 † (FOSSIL)
eximia, Pseudozygopleura eximia Hoare & Sturgeon, 1985 † (FOSSIL)
expansa, Gamizyga expansa Hoare & Sturgeon, 1980 † (FOSSIL)
expetendus, Microptychis expetendus Hoare & Sturgeon, 1981 † (FOSSIL)
fenestrata, Hyphantozyga fenestrata Hoare & Sturgeon, 1980 † (FOSSIL)
filicosta, Hyphantozyga filicosta Hoare, 1961 † (FOSSIL)
funis, Pseudozygopleura funis Knight, 1930 † (FOSSIL)
fusiforma, Hyphantozyga fusiforma Hoare & Sturgeon, 1980 † (FOSSIL)
girtyi, Gamizyga girtyi Hoare & Sturgeon, 1980 † (FOSSIL)
girtyi, Pseudozygopleura girtyi Knight, 1930 † (FOSSIL)
globosa, Hemizyga globosa Batten, 1985 † (FOSSIL)
gracilis, Hemizyga gracilis Girty, 1915 † (FOSSIL)
gracilis, Hyphantozyga gracilis Knight, 1930 † (FOSSIL)
gracilis, Pseudozygopleura gracilis Yoo, 1994 † (FOSSIL)
gradatus, Pseudozygopleura gradatus Hoare & Sturgeon, 1981 † (FOSSIL)
granda, Pseudozygopleura granda (Kues & Batten, 2001) † (FOSSIL)
granda, Stephanozyga granda Kues & Batten, 2001 † - syn of: Pseudozygopleura granda (Kues & Batten, 2001) † (FOSSIL)
grandicostata, Hemizyga grandicostata Girty, 1915 † (FOSSIL)
grandis, Hyphantozyga grandis Hoare & Sturgeon, 1980 † (FOSSIL)
granifera, Hyphantozyga granifera (de Koninck, 1876) † (FOSSIL)
gruendeli, Plocezyga gruendeli Kaim, 2004 † (FOSSIL)
heliciforma, Hemizyga heliciforma Batten, 1966 † (FOSSIL)
hoarei, Pseudozygopleura hoarei Nützel, 1998 † (FOSSIL)
ignorata, Stephanozyga ignorata (Trautschold, 1867) † (FOSSIL)
illineata, Hemizyga illineata Knight, 1930 † (FOSSIL)
indica, Plocezyga indica Reed, 1944 † (FOSSIL)
inflata, Hemizyga inflata Knight, 1930 † (FOSSIL)
inornata, Pseudozygopleura inornata Knight, 1930 † - syn of: Pseudozygopleura semicostata (Meek, 1871) † (FOSSIL)
insolita, Microptychis insolita Kues, 2002 † (FOSSIL)
intermedia, Plocezyga intermedia Hoare & Sturgeon, 1980 † (FOSSIL)
intermittens, Eoptychia intermittens Hoare, 1961 † (FOSSIL)
irrugata, Pseudozygopleura irrugata Hoare & Sturgeon, 1985 † (FOSSIL)
jacksoni, Microptychis jacksoni Longstaff † (FOSSIL)
kellettae, Pseudozygopleura kellettae Knight, 1930 † (FOSSIL)
knighti, Pseudozygopleura knighti (Yochelson, 1962) † (FOSSIL)
knighti, Hyphantozyga knighti Hoare & Sturgeon, 1980 † (FOSSIL)
knighti, Cyclozyga knighti Licharev, 1975 † - syn of: Stegocoelia knighti (Licharev, 1975) † (FOSSIL)
lanceolatus, Pseudozygopleura lanceolatus Hoare & Sturgeon, 1981 † (FOSSIL)
larga, Hemizyga larga Kues & Batten, 2001 † (FOSSIL)
lefebvrei, Pseudozygopleura lefebvrei (Léveillé, 1835) † (FOSSIL)
leveneae, Pseudozygopleura leveneae Knight, 1930 † (FOSSIL)
limus, Pseudozygopleura limus Hoare & Sturgeon, 1981 † (FOSSIL)
lineata, Plocezyga lineata Hoare & Sturgeon, 1980 † (FOSSIL)
lirata, Pseudozygopleura lirata Batten, 1985 † (FOSSIL)
lirata, Plocezyga lirata Hoare & Sturgeon, 1980 † (FOSSIL)
lisaspira, Stephanozyga lisaspira Kues & Batten, 2001 † (FOSSIL)
longnorensis, Stephanozyga longnorensis Longst, 1933 † (FOSSIL)
macra, Pseudozygopleura macra Knight, 1930 † (FOSSIL)
magna, Stephanozyga magna Wang, 1987 † (FOSSIL)
mapesi, Plocezyga mapesi Nützel, 1998 † (FOSSIL)
markae, Plocezyga markae Hoare & Sturgeon, 1980 † (FOSSIL)
marvinwelleri, Pseudozygopleura marvinwelleri Knight, 1930 † (FOSSIL)
matanensis, Hyphantozyga matanensis Pan & Yu, 1993 † (FOSSIL)
micra, Cyclozyga micra (Beus, 1978) † (FOSSIL)
micra, Pseudozygopleura micra Pan & Erwin, 2002 † (FOSSIL)
mirabilis, Cyclozyga mirabilis Knight, 1930 † (FOSSIL)
moorei, Pseudozygopleura moorei Knight, 1930 † (FOSSIL)
morningstarae, Gamizyga morningstarae Hoare & Sturgeon, 1980 † (FOSSIL)
mucronatus, Pseudozygopleura mucronatus Hoare & Sturgeon, 1981 † (FOSSIL)
multicostata, Pseudozygopleura multicostata (Meek & Worthen, 1862) † (FOSSIL)
mutabilis, Pseudozygopleura mutabilis Kues, 2004 † (FOSSIL)
nana, Pseudozygopleura nana (Girty, 1915) † (FOSSIL)
neotenica, Cyclozyga neotenica Elias, 1958 † (FOSSIL)
nigra, Pseudozygopleura nigra Knight, 1930 † (FOSSIL)
nishimurai, Stephanozyga nishimurai Kase, 1988 † (FOSSIL)
nitida, Gamizyga nitida Hoare & Sturgeon, 1980 † (FOSSIL)
nodosa, Stephanozyga nodosa (Girty, 1915) † (FOSSIL)
noinskyi, Hyphantozyga noinskyi Mazaev, 2015 † (FOSSIL)
obliqua, Pseudozygopleura obliqua Batten, 1985 † (FOSSIL)
obscura, Plocezyga obscura Hoare & Sturgeon, 1980 † (FOSSIL)
obtusicacuminis, Pseudozygopleura obtusicacuminis Knight, 1930 † (FOSSIL)
occabus, Microptychis occabus Hoare & Sturgeon, 1981 † (FOSSIL)
ornamentaria, Stephanozyga ornamentaria (Netchaev, 1894) † (FOSSIL)
ornata, Plocezyga ornata (Mark, 1912) † (FOSSIL)
ornatissima, Plocezyga ornatissima Hoare & Sturgeon, 1980 † (FOSSIL)
pagoda, Pseudozygopleura pagoda Knight, 1930 † (FOSSIL)
palus, Pseudozygopleura palus Hoare & Sturgeon, 1981 † (FOSSIL)
pandus, Pseudozygopleura pandus Hoare & Sturgeon, 1981 † (FOSSIL)
peoriense, Pseudozygopleura peoriense (Worthen, 1884) † (FOSSIL)
perattenuata, Hyphantozyga perattenuata Hoare & Sturgeon, 1980 † (FOSSIL)
percostata, Plocezyga percostata Knight, 1930 † (FOSSIL)
permiana, Microptychis permiana Batten, 1985 † (FOSSIL)
perminuta, Plocezyga perminuta Hoare & Sturgeon, 1980 † (FOSSIL)
perversa, Pseudozygopleura perversa Knight, 1930 † (FOSSIL)
pinquicula, Pseudozygopleura pinquicula Hoare & Sturgeon, 1985 † (FOSSIL)
plebium, Pseudozygopleura plebium Herrick, 1887 † - syn of: Pseudozygopleura yandellana (Hall, 1856) † (FOSSIL)
pleurozyga, Pseudozygopleura pleurozyga Batten, 1985 † (FOSSIL)
plummeri, Pseudozygopleura plummeri Knight, 1930 † (FOSSIL)
pluricostata, Pseudozygopleura pluricostata Knight, 1930 † (FOSSIL)
praeacuta, Pseudozygopleura praeacuta Knight, 1930 † (FOSSIL)
propria, Pseudoplocezyga propria Licharev, 1975 † (FOSSIL)
pugonis, Pseudozygopleura pugonis Hoare & Sturgeon, 1981 † (FOSSIL)
pulchra, Hyphantozyga pulchra Hoare & Sturgeon, 1980 † (FOSSIL)
pulchra, Pseudozygopleura pulchra Knight, 1930 † (FOSSIL)
pupa, Pseudozygopleura pupa Knight, 1930 † (FOSSIL)
Pyrgozyga, Pseudozygopleura Pyrgozyga Knight, 1930 † (FOSSIL)
recticostata, Pseudozygopleura recticostata Knight, 1930 † (FOSSIL)
rectus, Pseudozygopleura rectus Hoare & Sturgeon, 1981 † (FOSSIL)
regularia, Plocezyga regularia Hoare & Sturgeon, 1980 † (FOSSIL)
restis, Pseudozygopleura restis Knight, 1930 † (FOSSIL)
rothi, Pseudozygopleura rothi Knight, 1930 † (FOSSIL)
rugifera, Stephanozyga rugifera (Phillips, 1836) † (FOSSIL)
schucherti, Pseudozygopleura schucherti Knight, 1930 † (FOSSIL)
scitula, Pseudozygopleura scitula (Meek & Worthen, 1860) † (FOSSIL)
scruposus, Pseudozygopleura scruposus Hoare & Sturgeon, 1981 † (FOSSIL)
semicostata, Pseudozygopleura semicostata (Meek, 1871) † (FOSSIL)
serocorona, Plocezyga serocorona Batten, 1985 † (FOSSIL)
sinuosior, Pseudozygopleura sinuosior Knight, 1930 † (FOSSIL)
sinusigera, Cyclozyga sinusigera Yoo, 1988 † (FOSSIL)
sturgeoni, Pseudozygopleura sturgeoni Nützel, 1998 † (FOSSIL)
subclathrata, Pseudozygopleura subclathrata (Römer, 1843) † (FOSSIL)
subnodosa, Plocezyga subnodosa Hoare & Sturgeon, 1980 † (FOSSIL)
subnodosa, Stephanozyga subnodosa Knight, 1930 † (FOSSIL)
subquadrata, Plocezyga subquadrata Hoare & Sturgeon, 1980 † (FOSSIL)
subulatus, Pseudozygopleura subulatus Hoare & Sturgeon, 1981 † (FOSSIL)
sulcata, Eoptychia sulcata (de Koninck, 1881) † (FOSSIL)
tenuilirata, Plocezyga tenuilirata Knight, 1930 † (FOSSIL)
tenuis, Plocezyga tenuis Knight, 1930 † (FOSSIL)
tenuistriata, Eoptychia tenuistriata (Portlock, 1843) † (FOSSIL)
tenuivirga, Pseudozygopleura tenuivirga Knight, 1930 † (FOSSIL)
terebrus, Pseudozygopleura terebrus Knight, 1930 † (FOSSIL)
teres, Pseudozygopleura teres (Girty, 1915) † (FOSSIL)
textilis, Hyphantozyga textilis Hoare & Sturgeon, 1980 † (FOSSIL)
trochus, Microptychis trochus Knight, 1930 † (FOSSIL)
turbinata, Plocezyga turbinata Hoare & Sturgeon, 1980 † (FOSSIL)
turbineus, Microptychis turbineus Hoare & Sturgeon, 1981 † (FOSSIL)
undulata, Helminthozyga undulata Hoare & Sturgeon, 1978 † (FOSSIL)
varica, Plocezyga varica Pan & Erwin, 2002 † (FOSSIL)
variegata, Pseudozygopleura variegata Hoare & Sturgeon, 1985 † (FOSSIL)
vermiculus, Helminthozyga vermiculus Knight, 1930 † (FOSSIL)
warthini, Pseudozygopleura warthini Knight, 1930 † (FOSSIL)
werneri, Pseudozygopleura werneri Knight, 1930 † (FOSSIL)
williamsi, Microptychis williamsi Knight, 1930 † (FOSSIL)
wrighti, Microptychis wrighti Longst, 1912 † (FOSSIL)
yandellana, Pseudozygopleura yandellana (Hall, 1856) † (FOSSIL)
yunnanensis, Plocezyga yunnanensis Pan & Erwin, 2002 † (FOSSIL)
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