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Unionata

Bivalvia

Taxonomy
Unionata was named by Gray (1854). It is extant.

It was assigned to Unioni by Carter et al. (2011).

Subtaxa
Trigoniida, Unionida

Synonymy list
YearName and author
1854Unionata Gray
2011Unionata Carter et al. p. 11

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Spiralia
superphylumLophotrochozoa
phylumMollusca
classBivalvia
RankNameAuthor
—Eubivalvia
subclassAutobranchia(Groblen 1894)
infraclassHeteroconchia(Gray 1854)
—UniomorphiGray 1854
—UnioniGray 1854
—UnionataGray 1854
—UnionataGray 1854

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

Unr. Unionata Gray 1854
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Or. Trigoniida Dall 1889
+
G. †Gobiella
G. †Heslingtonia Fleming 1987
G. †Kupenga
G. †Macrotrigonia Camacho and Olivero 1985
Superfm. †Myophorelloidea Kobayashi 1954
+
Unr. †Megatrigonioidae van Hoepen 1929
+
Unr. †Megatrigoniitae van Hoepen 1929
+
Fm. †Megatrigoniidae van Hoepen 1929
+
Invalid names: Anditrigoniidae Leanza 1993 [synonym]
Invalid names: Iotrigoniidae Saveliev 1958 [empty]
Unr. †Rutitrigoniitae van Hoepen 1929
+
Invalid names: Rutitrigoniidae van Hoepen 1929 [empty]
Unr. †Myophorelloidae Kobayashi 1954
+
Fm. †Buchotrigoniidae Leanza 1993
+
Subfm. †Syrotrigoniinae Perez and Reyes 1997
Invalid names: Buchotrigoniinae Leanza 1993 [empty]
Fm. †Laevitrigoniidae Saveliev 1958
+
Subfm. †Frenguelliellinae Nakano 1960
Subfm. †Laevitrigoniinae Saveliev 1958
Fm. †Myophorellidae Kobayashi 1954
+
Subfm. †Myophorellinae Kobayashi 1954
Subfm. †Steinmanellinae Cooper 1991
Subfm. †Vaugoniinae Kobayashi 1954
Fm. †Steinmanellidae Cooper 1991
+
Subfm. †Yaadiinae Cooper and Leanza 2017
+
G. †Louella Cooper and Leanza 2017
G. †Popenoella Cooper and Leanza 2017
+
Invalid names: Packardella Kobayashi and Amano 1955 [synonym]
G. †Tashiroella Cooper and Leanza 2017
G. †Yaadia Crickmay 1930
G. †Yeharella Kobayashi and Amano 1955
Invalid names: Frenguelliellidae Nakano 1960 [empty]
Superfm. †Pseudocardinioidea Martinson 1961
+
Fm. †Pseudocardiniidae Martinson 1961
+
G. †Apseudocardinia Liu and Zhu 1978
+
†Apseudocardinia sichuanensis Liu and Zhu 1978
G. †Hamiconcha Huang et al. 1981
G. †Jiangxiella Liu 1968
+
†Jiangxiella plana Liu 1976
G. †Pseudocardinia Martinson 1959
G. †Xinjiangconcha Wei 1984
+
G. †Xinyuella Chen and Xu 1980
+
†Xinyuella liuyangensis Gu and Liu 1976
Fm. †Utschamiellidae Kolesnikov 1977
+
G. †Utschamiella Ragozin 1937
Subor. Trigoniina Dall 1899
+
Superfm. Trigoniacea Lamarck 1819
+
G. †Anopisthodon Philippi 1899
+
†Anopisthodon obesa Philippi 1847
G. †Aulacopleurum Philippi 1899
Superfm. Trigonioidea Lamarck 1819
+
Fm. †Costatoriidae Newell and Boyd 1975
+
G. †Procostatoria Newell and Boyd 1975
+
†Procostatoria cooperi Newell and Boyd 1975
†Procostatoria gloveri Newell and Boyd 1975
†Procostatoria sexradiata Branson 1930
Fm. †Eoschizodidae Newell and Boyd 1975
+
G. †Eoschizodus Cox 1951
+
†Eoschizodus hispanicus Amler 2010
†Eoschizodus truncatus Goldfuss 1837
Fm. †Groeberellidae Pérez et al. 1995
+
G. †Groeberella Leanza 1993
+
†Groeberella neuquensis Groeber 1924
Fm. †Ladinomyidae Prinoth and Posenato 2023
+
G. †Ladinomya Prinoth and Posenato 2023
+
†Ladinomya fosteri Prinoth and Posenato 2023
Fm. †Myophoriidae Bronn 1847
+
G. †Acanomyphoria Guo 1985
+
G. †Amlerella Franke 2016
+
†Amlerella dahmeri Drevermann 1907
†Amlerella peregrina Beushausen 1895
G. †Atalantia Termier and Verriez 1974
+
†Atalantia trigonioides Termier 1974
G. †Baidiostraca Guo 1988
+
G. †Caledogonia Freneix and Avias 1977
+
†Caledogonia globosa Freneix and Avias 1977
G. †Dolabra M'Coy 1844
+
†Dolabra arcina Waagen 1881
†Dolabra unilateralis Sowerby 1840
+
Invalid names: Dolabra condrusorum Beushausen 1895 [synonym]
G. †Elegantinia Waagen 1907
+
†Elegantinia elegans Dunker 1849
†Elegantinia paullorum Boyd and Newell 1997
Invalid names: Lyriomyophoria Kobayashi 1954 [objective synonym]
G. †Erugonia Newton et al. 1987
+
†Erugonia canyonensis Newton et al. 1987
G. †Gruenewaldia von Wöhrmann 1889
+
†Gruenewaldia decussata Munster 1838
†Gruenewaldia iranica Hautmann 2001
†Gruenewaldia magna Hautmann 2001
†Gruenewaldia woehrmanni Bittner 1895
G. †Guizhoumyophoria Fang 2009
+
Invalid names: Quadratia Yin 1974 [replaced]
G. †Hefteria
G. †Heminajas Wöhrmann 1891
+
†Heminajas balatonis Frech 1905
†Heminajas fissidentata von Wöhrmann 1889
†Heminajas fornulata Chen 1976
†Heminajas geyeri Waagen 1907
†Heminajas haastiana Wilckens 1918
†Heminajas woehrmanni Waagen 1907
G. †Myophoria Bronn 1834
+
Subg. †Myophoria (Rhenania) Waagen 1907
Subg. †Myophoria (Tropiphora) Waagen 1907
†Myophoria acuticostata Broili 1904
†Myophoria adornata McLearn 1942
†Myophoria ambilineata White 1877
†Myophoria beringiana Smith 1927
†Myophoria bittneri Newton 1923
†Myophoria blainvillei Klipstein 1843
†Myophoria blakei Cox 1932
†Myophoria brockensis Smith 1927
†Myophoria cairnesi McLearn 1942
†Myophoria chenopus Laube 1865
†Myophoria costulata Bittner 1895
†Myophoria coxi Awad 1945
†Myophoria ebbae Isberg 1934
†Myophoria elliptica Ogilvie Gordon 1927
†Myophoria germanica Hohenstein 1914
†Myophoria goldfussi Alberti 1834
†Myophoria harpa Munster 1837
†Myophoria heslingtonensis Trechmann 1917
†Myophoria incurvata Seebach 1867
†Myophoria inflata Emmrich 1853
†Myophoria intermedia Schauroth 1857
†Myophoria kefersteini Münster 1828
†Myophoria kokeni Bittner 1895
†Myophoria kuuoruensis Skwarko 1967
†Myophoria liasica Stoppani 1857
†Myophoria maxima Krumbeck 1923
†Myophoria mexicana de Cserna 1961
†Myophoria nifukokoensis Krumbeck 1924
†Myophoria ornata Münster 1841
†Myophoria picta Lepsius 1878
†Myophoria proharpa Frech 1912
†Myophoria reziae Stoppani 1865
†Myophoria solitaria Bittner 1895
†Myophoria staggi Skwarko 1967
†Myophoria stenonis Stoppani 1865
†Myophoria subtrigonata Airaghi 1907
†Myophoria subvestita Krumbeck 1913
†Myophoria timorensis Krumbeck 1924
†Myophoria transversa Bornemann 1856
†Myophoria vestita Alberti 1864
†Myophoria volzi Frech 1912
†Myophoria vulgaris von Schlotheim 1820
†Myophoria zeballos McLearn 1942
Invalid names: Trigonellites von Schlotheim 1820 [synonym]
G. †Neoschizodus Giebel 1855
+
Subg. †Neoschizodus (Leviconcha) Waagen 1907
Subg. †Neoschizodus (Okunominetania) Ichikawa 1949
†Neoschizodus cardissoides Ziethen 1830
†Neoschizodus elongatus Philippi 1898
†Neoschizodus elongatus Boyd and Newell 1997
†Neoschizodus elongatus Giebel 1856
†Neoschizodus kitakamiensis Nakazawa and Newell 1968
†Neoschizodus kobayashii Ichikawa 1951
†Neoschizodus kolymensis Bychkov et al. 1976
†Neoschizodus laevigatus Ziethen 1830
†Neoschizodus mongumensis Skwarko 1967
†Neoschizodus ovatus Goldfuss 1838
†Neoschizodus permicus Nakazawa 1960
†Neoschizodus thaynesianus Newell and Boyd 1975
G. †Paraschizodus Newell and Boyd 1975
+
†Paraschizodus elongatus Newell and Boyd 1975
†Paraschizodus rothi Newell and Boyd 1975
G. †Rhenania Waagen 1907
+
Subg. †Rhenania (Dianorhenania) Guo 1985
G. †Rhenanomya LaRoque 1969
+
†Rhenanomya crassa Solle 1956
†Rhenanomya tumida Fuchs 1915
G. †Toechomya
G. †Trionychodia Guo 1988
+
†Trionychodia bella Guo 1988
G. †Yangella Liu and Gu 1988
+
†Yangella cuneatiformis Liu and Gu 1988
Invalid names: Cytherodontidae Miller [synonym], Gruenewaldiidae Cooper 1991 [synonym]
Fm. †Prosogyrotrigoniidae Kobayashi 1954
+
Subfm. †Praegoniinae Fleming 1962
+
G. †Agonisca Fleming 1963
G. †Praegonia Fleming 1962
Subfm. †Prosogyrotrigoniinae Kobayashi 1954
+
G. †Prosogyrotrigonia Krumbeck 1924
Fm. †Scaphellinidae Newell and Ciriacks 1962
+
G. †Scaphellina Newell and Ciriacks 1962
+
†Scaphellina concinna Branson 1930
+
Invalid names: Scaphellina bradyi Newell and Ciriacks 1962 [synonym], Scaphellina phosphoriensis Branson 1930 [synonym]
†Scaphellina praeobscurus Guskov 1984
Fm. †Schizodidae Newell and Boyd 1975
+
Subfm. †Eoastartinae Newell and Boyd 1975
+
G. †Eoastarte Ciriacks 1963
G. †Kaibabella Chronic 1952
G. †Heteroschizodus Newell and Boyd 1975
+
†Heteroschizodus macomoides Newell and Boyd 1975
G. †Schizodus King 1844
+
†Schizodus acuminatus Hoare et al. 1978
†Schizodus affinis Herrick 1887
†Schizodus alpinus Hall 1858
†Schizodus altus Newell and Boyd 1975
†Schizodus amplus Meek and Worthen 1870
+
Invalid names: Schizodus mooresi Miller 1889 [synonym]
†Schizodus antiquus Hind 1898
†Schizodus australis Runnegar 1969
†Schizodus bifidus Ciriacks 1963
†Schizodus canalis Branson 1930
†Schizodus cardissa Waagen 1881
†Schizodus chesterensis Meek and Worthen 1860
†Schizodus compressus Rogers 1900
†Schizodus compressus Waagen 1881
†Schizodus crespinae Dickins 1957
†Schizodus cuneatus Meek 1875
†Schizodus curtiforme Walcott 1884
†Schizodus curtus Meek and Worthen 1866
†Schizodus cycloliratus Harrington 1955
†Schizodus deparcus Walcott 1884
†Schizodus depressus Worthen 1884
+
Invalid names: Schizodus abruptus Girty 1915 [objective synonym], Schizodus circularis Worthen 1884 [synonym]
†Schizodus dianensis Guo 1985
†Schizodus dubiiformis Waagen 1881
†Schizodus ellioti Maxwell 1964
†Schizodus elongatus Grabau 1931
†Schizodus emarginatus Reed 1944
†Schizodus ferrieri Girty 1910
†Schizodus fitzroyensis Dickins 1963
†Schizodus globosus Maxwell 1964
†Schizodus guizhouensis Liu and Xu 1976
†Schizodus japonicus Hayasaka 1925
†Schizodus jiangbianensis Fang and Yin 1995
†Schizodus jiangxiensis Li and Ding 1982
†Schizodus kennedyensis Dickins 1956
†Schizodus lopingensis Kayser 1883
†Schizodus magnus Worthen 1884
†Schizodus meekanus Girty 1900
†Schizodus minutus Maxwell 1964
†Schizodus negrii Bittner 1892
†Schizodus obscurus Sowerby 1821
+
Invalid names: Axinus parvus Brown 1839 [synonym], Axinus pucillus Brown 1839 [synonym], Axinus undatus Brown 1839 [synonym], Lucina minima Brown 1839 [synonym]
†Schizodus ovatus Meek and Hayden 1858
†Schizodus parvulus Cooper 1953
†Schizodus pinguis Waagen 1881
†Schizodus pintoensis Walcott 1884
†Schizodus rhynchophorus Ponomarenko 2011
†Schizodus rossicus de Verneuil 1845
†Schizodus rotundatus Brown 1839
†Schizodus sandimanensis Dickins 1963
†Schizodus schlotheimi Geinitz 1841
†Schizodus securus Shumard 1859
†Schizodus sinensis Liu 1976
†Schizodus subcircularis Herrick 1887
†Schizodus subobscurus Licharew 1933
†Schizodus subovatus Ciriacks 1963
†Schizodus subquadratus Grabau 1931
†Schizodus supaiensis Winters 1963
†Schizodus texanus Clifton 1942
†Schizodus tibeticus Liu and Cui 1983
†Schizodus trigonalis Sayre 1930
†Schizodus truncatus King 1844
+
Invalid names: Schizodus dubius Schauroth 1856 [synonym]
†Schizodus tschernjaki Muromtseva 1974
†Schizodus ulrichi Worthen 1890
†Schizodus wheeleri Swallow 1863
†Schizodus wyomingensis Newell and Boyd 1975
Invalid names: Protoschizodus de Koninck 1885 [synonym], Schizodus jiaozishanensis Xu 1980 [nomen nudum], Schizodus qinglongensis Xu 1980 [nomen nudum]
G. †Silurozodus Liljedahl 1992
Fm. †Sinodorinae Pojeta and Zhang 1984
+
G. †Sinodora Pojeta and Zhang 1984
Invalid names: Schizodinae Newell and Boyd 1975 [empty]
Fm. Trigoniidae Lamarck 1819
+
G. †Asiatotrigonia Cox 1952
+
†Asiatotrigonia sultanuisi Archangelski 1916
G. †Buchotrigonia Dietrich 1938
+
†Buchotrigonia abrupta von Buch 1838
+
Invalid names: Trigonia humboldtii von Buch 1839 [synonym]
†Buchotrigonia cazadoriana Wilckens 1907
†Buchotrigonia collombi Vilanova 1863
†Buchotrigonia deshayesi Vilanova 1863
†Buchotrigonia flexicostata Fritzsche 1924
†Buchotrigonia inca Fritzsche 1924
†Buchotrigonia pizcuetana Vilanova 1863
†Buchotrigonia scheibei Dietrich 1938
G. †Eotrigonia Cossmann 1912
+
†Eotrigonia semiundulata Jenkins 1865
+
Invalid names: Trigonia subundulata Jenkins 1865 [synonym]
†Eotrigonia tubulifera Tate 1885
G. †Geratrigonia Kobayashi 1954
+
†Geratrigonia hosourensis Yokoyama 1904
†Geratrigonia kurumensis Kobayashi 1954
G. †Heterotrigonia Cox 1952
+
†Heterotrigonia sawatai Yehara 1900
G. †Kyushutrigonia Tamura and Nishimura 1994
+
†Kyushutrigonia hachibarensis Tamura and Nishimura 1994
G. †Latitrigonia Kobayashi 1957
G. †Linotrigonia van Hoepen 1929
+
†Linotrigonia fittoni Deshayes 1842
†Linotrigonia linifera van Hoepen 1929
†Linotrigonia meyeri Lycett 1875
G. †Liotrigonia Cox 1952
+
†Liotrigonia lingonensis Dumortier 1869
G. †Luxitrigonia Guo 1985
+
G. †Lyroschizodus Newell and Boyd 1975
+
†Lyroschizodus djemelensis Boyd and Newell 1979
†Lyroschizodus orbicularis Newell and Boyd 1975
†Lyroschizodus praecox Waagen 1881
†Lyroschizodus subelegans Waagen 1881
†Lyroschizodus tobai Hayasaka 1925
G. †Maputrigonia Leanza 1985
G. †Megatrigonia van Hoepen 1929
+
Subg. †Megatrigonia (Apiotrigonia) Cox 1952
Subg. †Megatrigonia (Iotrigonia) Van Hoepen 1929
†Megatrigonia arsinoe Philippi 1900
†Megatrigonia discors Philippi 1900
†Megatrigonia eximia Philippi 1899
†Megatrigonia obesa van Hoepen 1929
†Megatrigonia picunensis Weaver 1900
†Megatrigonia pusilla Philippi 1899
†Megatrigonia staffi Lange 1900
G. †Minetrigonia Kobayashi and Katayama 1938
+
†Minetrigonia anadyrensis Kiparisova 1966
†Minetrigonia bulunensis Kiparisova 1966
†Minetrigonia hegiensis Saeki 1925
†Minetrigonia pascoensis Steinmann 1930
†Minetrigonia suttonensis Clapp and Shimer 1911
Subfm. †Minetrigoniinae Kobayashi 1954
+
G. †Maoritrigonia Fleming 1962
G. †Perugonia Kobayashi and Tamura 1968
G. †Myophorigonia Cox 1952
+
†Myophorigonia jaworskii Steinmann 1929
†Myophorigonia kobayashii Tamura and McRoberts 1993
†Myophorigonia parcinoda Lycett 1872
†Myophorigonia paucicostata Jaworski 1922
†Myophorigonia salasi de Cserna 1961
G. Neotrigonia Cossmann 1912
+
†Neotrigonia bednalli Verco 1907
†Neotrigonia gemma Iredale 1924
†Neotrigonia lamarckii Gray 1838
†Neotrigonia margaritacea Lamarck 1804
Neotrigonia pectinata Lamarck 1819
†Neotrigonia strangei Adams 1854
†Neotrigonia uniophora Gray 1847
Subfm. †Neuquenitrigoniinae Leanza 1993
+
G. †Neuquenitrigonia Leanza and Garate 1987
G. †Nipponitrigonia Cox 1952
+
†Nipponitrigonia kikuchiana Yokoyama 1891
†Nipponitrigonia naumanni Yehara 1923
G. †Nototrigonia Cox 1952
+
†Nototrigonia cinctuta Etheridge 1902
Subfm. †Nototrigoniinae Skwarko 1963
+
Invalid names: Austrotrigoniinae Skwarko 1968 [synonym]
G. †Opisthotrigonia Cox 1952
+
†Opisthotrigonia retrorsa Kitchin 1903
G. †Pacitrigonia Marwick 1932
+
†Pacitrigonia destefanii Feruglio 1900
†Pacitrigonia ecplecta Wilckens 1910
†Pacitrigonia hanetiana d'Orbigny 1842
†Pacitrigonia patagonica Feruglio 1937
†Pacitrigonia sobrali Leanza and Casadío 1991
†Pacitrigonia sylvesteri Marwick 1932
G. †Prorotrigonia Cox 1952
+
†Prorotrigonia seranensis Krumbeck 1923
Subfm. †Psilotrigoniinae Fleming 1987
+
G. †Psilotrigonia Cox 1952
G. †Quadratotrigonia Dietrich 1933
+
†Quadratotrigonia nodosa Sowerby 1830
G. †Quoiecchia Crickmay 1930
+
†Quoiecchia aliciae Crickmay 1930
G. †Rutitrigonia van Hoepen 1929
+
†Rutitrigonia affinis Sowerby 1818
†Rutitrigonia agrioensis Weaver 1931
†Rutitrigonia bornhardti Müller 1900
†Rutitrigonia coquandiana d'Orbigny 1844
†Rutitrigonia dietrichi Lange 1914
†Rutitrigonia excentrica Parkinson 1811
†Rutitrigonia jacksonensis Packard 1921
†Rutitrigonia janenschi Lange 1914
†Rutitrigonia laeviuscula Lycett 1875
†Rutitrigonia longa Agassiz 1840
†Rutitrigonia mesembria Tenison-Woods 1900
†Rutitrigonia neumayri Yehara 1923
†Rutitrigonia peregrina van Hoepen 1929
†Rutitrigonia pongolensis Rennie 1936
†Rutitrigonia pseudoindica Archangelski 1916
†Rutitrigonia regina Wilckens 1911
†Rutitrigonia schwarzi Müller 1900
†Rutitrigonia semiculta Forbes 1846
G. †Sichuantrigonia Gou 1993
+
G. †Sphenotrigonia Rennie 1936
+
Subfm. Trigoniinae Lamarck 1819
+
G. †Guineana Skwarko 1967
G. †Trigonia Bruguière 1789
Invalid names: Lyrodontidae Bronn 1862 [synonym], Pleurotrigoniinae van Hoepen 1929 [empty]
Superfm. †Trigonioidoidea Cox 1952
+
Fm. †Jilinoconchidae Ma 1989
+
G. †Jilinoconcha Ma 1989
+
†Jilinoconcha songhuaensis Gu and Yu 1976
Fm. †Nakamuranaiadidae Guo 1981
+
G. †Cyotrigonioides Guo 1981
+
G. †Enotrigonioides Guo 1987
G. †Nakamuranaia Suzuki 1943
Fm. †Nippononaiidae Chen 1987
+
G. †Sinonaia Guo 1981
+
Invalid names: Nippononaiinae Chen 1987 [empty], Sinonaiinae Chen 1987 [empty]
Fm. Pseudohyriidae Kobajashi 1968
+
G. †Gobiola Martinson 1975
+
Subg. †Gobiola (Matsumotoina) Guo 1982
G. †Pseudohyria MacNeil 1936
+
G. †Weichangella Yu and Yao 1980
+
†Weichangella caelata Yu and Yao 1980
Fm. †Sainschandiidae Kolesnikov 1977
+
Fm. †Trigonioididae Cox 1952
+
G. †Americunio Guo 1986
+
†Americunio asinaria Reeside 1957
G. †Eotrigonioides Ma 1989
+
†Eotrigonioides antiqua Gu and Ma 1976
G. †Hoffetrigonia Suzuki 1940
G. †Linotrigonioides Guo 1987
+
Subfm. †Martinsonellinae Hong 1965
+
G. †Martinsonella Hong 1965
G. †Multiplicanaia Yu and Zhang 1984
+
†Multiplicanaia tujingziensis Yu and Zhang 1984
G. †Nippononaia Suzuki 1941
+
Subg. †Nippononaia (Arctonaia) Yu 1987
Subg. †Nippononaia (Eonippononaia) Guo 1981
Subfm. †Peregrinoconchinae Gu 1976
+
G. †Peregrinoconcha Chen and Lan 1976
G. †Pseudohyrioides Ma 1984
G. †Songhuanaia Gu 1976
+
G. †Trigonioides Kobayashi and Suzuki 1936
+
Subg. †Trigonioides (Wakinoa) Yang 1976
G. †Yeniella Modell 1964
Invalid names: Danlengiconchinae Sha 1993 [empty], Trigonioidinae Cox 1952 [empty]
Invalid names: Americunioninae Guo 1986 [empty], Plicatounionidae Chen 1987 [empty]
Superfm. †Trigonodoidea Modell 1942
+
Fm. †Desertellidae Dechauseaux 1946
+
G. †Desertella Haug 1905
Fm. †Trigonodidae Modell 1942
+
G. †Janaija Truschelev 1984
+
†Janaija magnoplicata Kurushin 1987
†Janaija nikolaevi Kurushin 1987
†Janaija praelonga Kiparisova 1937
†Janaija visibilis Kurushin 1987
G. †Trigonodus Alberti 1864
+
†Trigonodus abdominalis Jelen 1989
†Trigonodus bittneri Waagen 1907
†Trigonodus brevidens Waagen 1907
†Trigonodus carniolicus Bittner 1907
†Trigonodus costatus Wöhrmann 1892
†Trigonodus dieneri Waagen 1907
†Trigonodus intermedius Waagen 1907
†Trigonodus marmolatae Salomon 1895
†Trigonodus minor Newberry and Worthen 1866
†Trigonodus orientalis Bittner 1899
†Trigonodus praeco Philippi 1898
†Trigonodus problematicus Klipstein 1843
†Trigonodus productus Whiteaves 1889
†Trigonodus rablensis Gredler 1862
†Trigonodus ramovsi Jelen 1989
†Trigonodus sandbergeri von Alberti 1864
†Trigonodus serianus Parona 1889
†Trigonodus xiabolangensis Yin and Grant-Mackie 2005
Invalid names: Beichuanioidea Liu and Gu 1988 [empty], Lyrodesmatacea Ulrich 1894 [empty], Megatrigonioidea van Hoepen 1929 [empty], Myophorellina Cooper 1991 [empty]
Or. Unionida Stoliczka 1871
+
Superfm. †Archanodontacea Weir 1969
+
Fm. †Archanodontidae Weir 1969
+
G. †Archanodon Howse 1878
G. †Dianolimnia Guo 1985
+
G. †Neamnigenia Khalfin 1950
+
Subor. Hyriidina Hoeh 2009
+
Superfm. Hyrioidea Swainson 1840
+
Fm. Hyriidae Swainson 1840
+
G. Callonaia Simpson 1900
G. Castalia Lamarck 1819
Subfm. Hyriinae Swainson 1840
+
Invalid names: Prisodontinae Modell 1942 [synonym]
Invalid names: Propehyridellidae Iredale 1934 [synonym], Velesunioninae Iredale 1934 [empty]
G. †Protelliptio Russell 1934
Subor. †Silesunionidina Skawina and Dzik 2011
+
Invalid names: Silesunionoidea Skawina and Dzik 2011 [empty]
Subor. †Silesunionina Skawina and Dzik 2011
+
Fm. †Silesunionidae Skawina and Dzik 2011
+
G. †Silesunio Skawina and Dzik 2011
+
†Silesunio parvus Skawina and Dzik 2011
Invalid names: Unionellidae Skawina and Dzik 2011 [empty]
G. †Tihkia Sahni and Tewari 1958
+
†Tihkia silesiaca Skawina and Dzik 2011
Subor. Unionidina Gray 1854
+
Superfm. Mullerioidea Deshayes 1832
+
Fm. Etheriidae Deshayes 1830
+
G. Etheria Lamarck 1807
Fm. Iridinidae Swainson 1840
+
Subfm. Aspathariinae Modell 1942
+
Invalid names: Spathopsinae Modell 1942 [synonym]
Subfm. Iridininae Swainson 1840
+
Invalid names: Spathinae Bronn 1862 [synonym]
Invalid names: Pleiodontidae Rochebrune 1904 [synonym]
Fm. Mulleriidae Deshayes 1832
+
Subfm. Monocondylaeinae Modell 1942
G. Mulleria Férussac 1823
Subfm. Mycetopodinae Gray 1840
+
Invalid names: Acostaeidae Morrison 1973 [synonym]
Invalid names: Leilinae Morretes 1949 [empty], Mulleriinae Deshayes 1832 [empty], Pseudomulleriidae Starobogatov 1970 [synonym]
Superfm. Unionoidea Fleming 1828
+
Fm. †Actinodontophoridae Newell 1969
+
G. †Actinodontophora Ichikawa 1951
G. †Linshuiella Ma 1999
G. †Pseudoactinodontophora Murata 1971
G. †Zhongbanaia Ma 1999
Fm. Margaritiferidae Haas 1940
+
Subfm. Cumberlandiinae Heard and Guckert 1970
G. †Dianoconcha Guo 1988
G. †Margaritifera Schumacher 1815
G. †Mengyinaia Chen 1984
G. †Pseudomargaritifera Ma 1996
G. †Solenoides Ma 1996
Invalid names: Margaritanidae Ortmann 1910 [synonym], Promargaritiferidae Woodward 1994 [synonym]
Fm. †Mutelidae Swainson 1840
+
G. Leila Gray 1840
G. Mutela Scopoli 1777
Fm. †Pachycardiidae Cox 1961
+
G. †Cardinioides Kobayashi and Ichikawa 1952
G. †Guangdongella Li and Li 1980
G. †Pachycardia Hauer 1857
G. †Weixiella Guo and Chen 1985
G. †Weiyuanella Xu 1984
G. †Yunnanophorus Chen 1976
G. †Zhifangia Liu 1980
Fm. †Sancticarolitidae Simone and Mezzalira 1997
+
G. †Sancticarolis Mezzalira 1974
Fm. Unionidae Rafinesque 1820 [freshwater mussel]
+
G. †Acuneopsis Liu and Zhu 1978
Subfm. †Alasmidontinae Frierson 1927
Subfm. Ambleminae Rafinesque 1820
+
Invalid names: Cyprogeniinae Starobogatov 1970 [synonym], Friersoniinae Starobogatov 1970 [synonym], Medionidinae Starobogatov 1970 [synonym], Megalonaiadinae Heard and Guckert 1970 [synonym], Popenaiadinae Heard and Guckert 1970 [synonym], Propterinae Hannibal 1912 [synonym], Ptychobranchinae Starobogatov 1970 [synonym]
G. †Anodonta
G. Coelatura Conrad 1853
Subfm. Coelaturinae Modell 1942
+
Invalid names: Brazzaeainae Leloup 1950 [synonym], Dentaspathariinae Modell 1964 [synonym], Mweruellinae Pain and Woodward 1968 [synonym], Prisodontopsinae Pain and Woodward 1968 [synonym], Pseudospathinae Leloup 1950 [synonym]
G. †Comptio Liu and Luo 1978
G. Cuneopsis Simpson 1900
G. †Danlengiconcha Liu 1978
G. Elongaria Haas 1913
G. †Eocuneopsis Guo 1985
G. †Eolamprotula Gu 1962
Subfm. Gonideinae Ortmann 1916
+
Invalid names: Hyriopsinae Modell 1942 [synonym], Lamprotulinae Modell 1942 [synonym], Limnoscaphinae Lindholm 1932 [synonym], Pseudodontinae Frierson 1927 [synonym], Psilunioninae Starobogatov 1970 [synonym]
G. †Jishuiconcha Ding et al. 1982
G. Lamprotula Simpson 1900
G. †Liopotomida Ma 1999
G. †Liovetulonaia Ma 1999
G. †Luochengella Liu and Zhu 1978
Subfm. Modellnaiinae Brandt 1974
G. †Ningxiaconcha Ma 1991
G. †Paranodonta Kobayashi and Suzuki 1936
Subfm. Parreysiinae Henderson 1935
+
Invalid names: Arcidopsinae Starobogatov 1970 [synonym], Hemisolasminae Starobogatov 1970 [synonym], Lamellidentinae Modell 1942 [synonym]
G. †Periodunio Guo 1988
G. †Plicatounio Kobayashi and Suzuki 1936
G. Potomida Swainson 1840
+
Invalid names: Wenziella Modell 1958 [synonym]
G. Proparreysia Pilsbry 1921
G. †Pseudelliptio Zhu 1976
G. †Psilounio Guo 1985
G. †Qianweiella Liu and Luo 1981
G. †Qiyangia Chen and Xu 1980
G. Quadrula Rafinesque 1820
G. †Radioplicata Huang 1981
Subfm. Rectidentinae Modell 1942
+
Invalid names: Contradentinae Modell 1942 [synonym], Nannonaiinae Modell 1942 [synonym]
G. †Rhabdotophorus Russell 1935
G. †Shifangella Liu and Luo 1981
G. †Shistodesmus Simpson 1900
G. Solenaia Conrad 1869
G. †Tuberonaia Gu and Huang 1976
G. †Undulatula Gu 1976
G. †Unionelloides Gu 1962
Subfm. Unioninae Fleming 1828
+
Invalid names: Acuticostinae Starobogatov 1967 [synonym], Cafferiinae Modell 1942 [synonym], Heudeaninae Modell 1942 [synonym], Nodulariinae Starobogatov and Zatravkin 1987 [synonym], Strophitinae Starobogatov 1970 [synonym]
G. †Wulongiconcha Liu 1984
G. †Yunnanoconcha Gu and Ma 1976
Invalid names: Qiyangiinae Chen 1983 [empty]
Invalid names: Actinodontophoroidea Newell 1969 [empty], Amblemidae Rafinesque 1820 [empty], Archanodontoidea Modell 1957 [empty], Carydioidea Haffer 1959 [empty], Etherioidea Deshayes 1830 [empty]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
Composition: aragonitec
Locomotion: facultatively mobilec
Life habit: infaunalc
Diet: suspension feederc
Vision: blindc
Created: 2004-02-28 11:33:36
Modified: 2010-02-12 03:59:35
Source: c = class
Reference: Aberhan et al. 2004

Age range

Maximum range based only on fossils: base of the Floian to the top of the Holocene or 477.70000 to 0.00000 Ma
Minimum age of oldest fossil (stem group age): 470.0 Ma

Collections (4928 total)

Oldest occurrences

Time interval Ma Country or state Original ID and collection number
Arenig478.6 - 466.0Australia (Queensland) Trigonodus sp. (157069 157073)
Floian477.7 - 470.0China (Yunnan) Baidiostraca aberrans (200939)
Katian453.0 - 445.2Sweden (Dalarna) Myophoria ebbae (124939)
Wenlock433.4 - 427.4China (Jiangsu) Eoschizodus sp. (27751 27752)
Wenlock433.4 - 427.4USA (New York) Eoschizodus sp. (470)
Homerian - Gorstian430.5 - 425.6USA (Alaska) Schizodus sp. A, Schizodus sp. B (153969)
Lochkovian419.2 - 410.8China (Guangxi) Schizodus cuneus (3998) Schizodus cuneus, Schizodus appressus (4002) Schizodus peregrins (4003)
Lochkovian419.2 - 410.8USA (Florida) Eoschizodus sp. (75630)
Lochkovian419.2 - 410.8Australia (Victoria) Eoschizodus sp. (7196 8481)
Early/Lower Devonian419.2 - 393.3Australia (Victoria) Eoschizodus sp. (8345 8351 8359)
Pragian410.8 - 407.6China (Guangxi) Eoschizodus sp. (25814)
Pragian410.8 - 407.6Australia (Victoria) Dolabra unilateralis (75704 75713 75714) Eoschizodus sp. (8498)
Pragian - Emsian410.8 - 393.3Turkey (Istanbul) Eoschizodus sp., Hefteria sp., Toechomya sp. (32470)
Early/Lower Emsian409.1 - 402.5China (Guangxi) Schizodus sp. (3983)
Early/Lower Emsian409.1 - 402.5China (Heilongjiang) Toechomya sp. (25844)
Early/Lower Emsian409.1 - 402.5Australia (Victoria) Schizodus oweni (35555)
Early/Lower Emsian409.1 - 402.5Germany Pholadella peregrina (232221)
Emsian407.6 - 393.3Canada (Quebec) Schizodus sp. (608)
Emsian407.6 - 393.3New Zealand Eoschizodus sp. (40525 40529)
Emsian407.6 - 393.3Australia (New South Wales) Eoschizodus taemasensis, Schizodus truemani (35557 35558) Schizodus oweni (35556)