Classification of the family Posidoniidae

Fm. †Posidoniidae Frech 1909
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G. †Amonotis Kittl 1904
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Amonotis cancellaria Kittl 1903
Amonotis rothpletzi Wanner 1907
G. †Bositra De Gregorio 1886
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Bositra buchi Roemer 1836
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Invalid names: Posidonia ornati Quenstedt 1851 [synonym]
Bositra circularis Hsu 1937
Bositra limbata Guo 1985
Bositra sabinensis Monari 1994
Bositra sibirica Kurushin 1980
Bositra wengensis Wissmann 1841
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Invalid names: Sanguinolaria alpina Münster 1841 [synonym], Sanguinolaria okeni Münster 1841 [synonym]
Invalid names: Peribositria Kurushin and Truschelev 1989 [synonym]
G. †Caenodiotis Monari 1994
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Caenodiotis janus Meneghini 1853
Invalid names: Diotis Simonelli 1884 [replaced]
G. †Didymotis Gerhardt 1897
G. †Ellesmerella Waterhouse 2008
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Ellesmerella aranea Tozer 1961
G. †Guerichia Rzehak 1910
G. †Imposidonia Waterhouse 2008
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Imposidonia elegantula Waterhouse 2000
G. †Magnolobia Kurushin and Truschelev 2001
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Magnolobia prima Kiparisova and Popov 1946
G. †Multisidonia Polubotko 1992
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Multisidonia omolonensis Polubotko 1992
G. †Posidonia Bronn 1828
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Posidonia affinis Gemmellaro 1882
Posidonia becheri Bronn 1828
Posidonia bittneri de Lorenzo 1896
Posidonia blatchleyi Gabb 1870
Posidonia christophori Popov 1948
Posidonia daytonensis Gabb 1864
Posidonia dianensis Guo 1985
Posidonia ekiatapensis Bychkov et al. 1976
Posidonia elegans Gemmellaro 1882
Posidonia gemmellaroi de Lorenzo 1896
Posidonia germari Beyrich 1857
Posidonia gibbosa Gemmellaro 1882
Posidonia girtyi Morningstar 1922
Posidonia idriana Mojsisovics 1873
Posidonia jacksoni Smith 1927
Posidonia lineolata Gemmellaro 1882
Posidonia madisonensis Smith 1927
Posidonia minuta von Zieten 1833
Posidonia multicostata Emmons 1856
Posidonia nodosocostata Giebel 1857
Posidonia obliqua von Hauer 1875
Posidonia obsoletestriata Tommasi 1894
Posidonia olenekensis Popov 1964
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Invalid names: Posidonia kulensis Bychkov et al. 1976 [synonym]
Posidonia ovalis Kittl 1912
Posidonia pannonica Mojsisovics 1873
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Invalid names: Posidonomya alta Mojsisovics 1873 [synonym]
Posidonia praealpina Kittl 1912
Posidonia stella Gabb 1864
Posidonia subtilis Bytschkov and Efimova 1968
Posidonia triangularis Emmons 1856
Posidonia wengensis Giebel 1857
Invalid names: Posidonomya Bronn 1835 [objective synonym]
G. †Posidonotis Losacco 1942
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Posidonotis dainelii Losacco 1942
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Invalid names: Entolium balteatum Crickmay 1928 [synonym], Monotis symmetrica Hyatt 1894 [synonym], Pectinula cancellata Leanza 1943 [synonym]
Invalid names: Pectinula [synonym]
G. †Pterohalobia Guo 1985
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G. †Steinmannia Fischer 1886
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Steinmannia alikiensis Milova 1988
Steinmannia bronni Voltz 1833
Steinmannia viligaensis Milova 1988
Invalid names: Aulacomya Steinmann 1881 [replaced]
G. †Veldidenella Alma 1926
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Veldidenella dieneri Alma 1926