Classification of Cox 1952
G. †Apiotrigonia Cox 1952
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†Apiotrigonia buchi Geinitz 1900
†Apiotrigonia calderoni Cragin 1905
†Apiotrigonia chivensis Archangelski 1916
†Apiotrigonia disparilis d'Orbigny 1844
†Apiotrigonia heterosculpta Stanton 1901
†Apiotrigonia maudensis Whiteaves 1876
†Apiotrigonia newcombei Packard 1921
†Apiotrigonia pennata Sowerby 1819
†Apiotrigonia progonos Paulcke 1903
†Apiotrigonia robinaldina d'Orbigny 1844
†Apiotrigonia subovalis Jimbo 1894
†Apiotrigonia sulcataria Lamarck 1819
†Apiotrigonia syrdariensis Archangelski 1900
†Apiotrigonia turcmenensis Archangelski 1900
G. †Iotrigonia Van Hoepen 1929
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†Iotrigonia consanguinea Philippi 1899
†Iotrigonia crassitesta van Hoepen 1929
†Iotrigonia dubia Kitchin 1903
†Iotrigonia flexicostata Burwash 1913
†Iotrigonia foveata Philippi 1899
†Iotrigonia gamporrhyncha Philippi 1899
†Iotrigonia glyptica Woods 1917
†Iotrigonia haughtoni Rennie 1936
†Iotrigonia leucothea Philippi 1899
†Iotrigonia limatula Whitehouse 1946
†Iotrigonia lorenti Dana 1849
†Iotrigonia manflarum Philippi 1899
†Iotrigonia ovallei Philippi 1899
†Iotrigonia recurva Kitchin 1903
†Iotrigonia rolli Piatnizky 1900
†Iotrigonia vau Sharpe 1900
†Iotrigonia vscripta Kitchin 1903
G. †Jaworskiella Leanza 1942
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†Jaworskiella burckhardti Jaworski 1916
†Jaworskiella freixialensis Choffat 1887
†Jaworskiella kobyi Choffat 1887
G. †Oistotrigonia Cox 1952
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†Oistotrigonia antarctica Wilckens 1900
†Oistotrigonia archiaciana d'Orbigny 1900
†Oistotrigonia constantii d'Orbigny 1900
†Oistotrigonia crenifera Stoliczka 1872
†Oistotrigonia cunningtoni Lycett 1875
†Oistotrigonia guelemensis Vogel 1900
†Oistotrigonia inornata d'Orbigny 1900
†Oistotrigonia lamarckii Matheron 1900
†Oistotrigonia ornata d'Orbigny 1843
†Oistotrigonia parva Brüggen 1910
†Oistotrigonia pulchra Kitchin 1903
†Oistotrigonia pygoscelium Wilckens 1910
†Oistotrigonia pyrrha d'Orbigny 1900
†Oistotrigonia spinosa Parkinson 1811
†Oistotrigonia subspinosa de Loriol 1900
†Oistotrigonia tenuisulcata Dujardin 1805
†Oistotrigonia upwarensis Lycett 1875
†Oistotrigonia vicaryana Lycett 1875
†Oistotrigonia waiparensis Woods 1900
†Oistotrigonia weberi Archangelski 1900
G. †Orthotrigonia Cox 1952
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†Orthotrigonia alcobacensis Choffat 1900
†Orthotrigonia duplicata Sowerby 1819
†Orthotrigonia exortiva Kitchin 1900
†Orthotrigonia gracilis Kitchin 1900
†Orthotrigonia hispida Kitchin 1900
†Orthotrigonia jumarensis Kitchin 1900
G. †Rutitrigonia van Hoepen 1929
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†Rutitrigonia affinis Sowerby 1818
†Rutitrigonia agrioensis Weaver 1931
†Rutitrigonia bornhardti Müller 1900
†Rutitrigonia coquandiana d'Orbigny 1844
†Rutitrigonia dietrichi Lange 1914
†Rutitrigonia dunscombiensis Lycett 1900
†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 niongalensis Lange 1914
†Rutitrigonia palaeopatagonica Piatnizky 1900
†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. †Scaphotrigonia Dietrich 1933
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†Scaphotrigonia naviformis Hyatt 1892
†Scaphotrigonia navis Lamarck 1900
G. †Vaugonia Crickmay 1930
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†Vaugonia clythia d'Orbigny 1850
†Vaugonia doroschini Eichwald 1871
†Vaugonia goodalli Cragin 1900
†Vaugonia hauchcornei Schmidt 1900
†Vaugonia tripartita Forbes 1900
†Vaugonia vcostata Lycett 1850
†Vaugonia veronica Crickmay 1930
Fm. Trigoniidae Lamarck 1819
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G. †Buchotrigonia Dietrich 1938
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Subg. †Buchotrigonia (Syrotrigonia) Cox 1952
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†Buchotrigonia (Syrotrigonia) distans Noetling 1886
†Buchotrigonia (Syrotrigonia) fraasi Cox 1952
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Invalid names: Trigonia syriaca Fraas 1878 [replaced]
†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
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G. †Heterotrigonia Cox 1952
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†Heterotrigonia diversicostata Whiteaves 1876
†Heterotrigonia sawatai Yehara 1900
G. †Laevitrigonia Lebküchner 1932
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†Laevitrigonia cardiniiformis Kitchin 1903
†Laevitrigonia eudesi Bigot 1900
†Laevitrigonia gibbosa Sowerby 1900
†Laevitrigonia meridiana Woods 1917
†Laevitrigonia oviedensis Lycett 1881
†Laevitrigonia spissicostata Kitchin 1903
†Laevitrigonia trapeziformis Kitchin 1903
G. †Linotrigonia van Hoepen 1929
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Subg. †Linotrigonia (Oistotrigonia) Cox 1952
†Linotrigonia fittoni Deshayes 1842
†Linotrigonia linifera van Hoepen 1929
†Linotrigonia meyeri Lycett 1875
G. †Megatrigonia van Hoepen 1929
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Subg. †Megatrigonia (Apiotrigonia) Cox 1952
Subg. †Megatrigonia (Iotrigonia) Van Hoepen 1929
Subg. †Megatrigonia (Rutitrigonia) van Hoepen 1929
†Megatrigonia arsinoe Philippi 1900
†Megatrigonia carrincurensis Leanza 1941
†Megatrigonia conocardiiformis Krauss 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
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†Minetrigonia hegiensis Saeki 1925
†Minetrigonia pascoensis Steinmann 1930
†Minetrigonia suttonensis Clapp and Shimer 1911
G. †Myophorella Bayle 1878
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Subg. †Myophorella (Jaworskiella) Leanza 1942
Subg. †Myophorella (Myophorella) Bayle 1878
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†Myophorella (Myophorella) clathrata Agassiz 1900
†Myophorella (Myophorella) clivosa Credner 1900
†Myophorella (Myophorella) depereti Riche 1900
†Myophorella (Myophorella) griesbachi Lycett 1863
†Myophorella (Myophorella) kurri Oppel 1900
†Myophorella (Myophorella) lusitanica Sharpe 1900
†Myophorella (Myophorella) spinifera d'Orbigny 1900
Invalid names: Myophorella (Clavitrigonia) Leanza 1942 [synonym], Myophorella (Clavotrigonia) Lebküchner 1932 [synonym], Myophorella (Haidaia) Crickmay 1930 [synonym], Myophorella (Scaphogonia) Crickmay 1930 [synonym]
Subg. †Myophorella (Orthotrigonia) Cox 1952
Subg. †Myophorella (Scaphotrigonia) Dietrich 1933
Subg. †Myophorella (Vaugonia) Crickmay 1930
†Myophorella nodulosa Lamarck 1801
G. †Myophorigonia Cox 1952
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†Myophorigonia margaritifera Boehm 1904
†Myophorigonia parcinoda Lycett 1872
†Myophorigonia paucicostata Jaworski 1922
G. Neotrigonia Cossmann 1912
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†Neotrigonia acuticostata McCoy 1866
Neotrigonia pectinata Lamarck 1819
G. †Nipponitrigonia Cox 1952
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†Nipponitrigonia kikuchiana Yokoyama 1891
†Nipponitrigonia naumanni Yehara 1923
G. †Pacitrigonia Marwick 1932
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†Pacitrigonia destefanii Feruglio 1900
†Pacitrigonia ecplecta Wilckens 1910
†Pacitrigonia hanetiana d'Orbigny 1842
†Pacitrigonia patagonica Feruglio 1937
†Pacitrigonia sylvesteri Marwick 1932
G. †Pterotrigonia van Hoepen 1929
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†Pterotrigonia cristata van Hoepen 1929
Invalid names: Acanthotrigonia van Hoepen 1929 [synonym], Notoscabrotrigonia Dietrich 1933 [synonym], Pisotrigonia van Hoepen 1929 [synonym], Ptilotrigonia van Hoepen 1929 [synonym], Rinetrigonia van Hoepen 1929 [synonym], Scabrotrigonia Dietrich 1933 [synonym]
G. †Trigonia Bruguière 1789
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Subg. †Trigonia (Frenguelliella) Leanza 1942
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†Trigonia (Frenguelliella) belgrandi Munier-Chalmas 1887
†Trigonia (Frenguelliella) chubutensis Feruglio 1936
†Trigonia (Frenguelliella) clavulosa Rigaux and Sauvage 1900
†Trigonia (Frenguelliella) concinna Roemer 1900
†Trigonia (Frenguelliella) indica Stoliczka 1870
†Trigonia (Frenguelliella) inexspectata Jaworski 1916
†Trigonia (Frenguelliella) minuta Stoliczka 1870
†Trigonia (Frenguelliella) monthiersi Munier-Chalmas 1880
†Trigonia (Frenguelliella) orientalis Forbes 1846
†Trigonia (Frenguelliella) parvula Agassiz 1840
†Trigonia (Frenguelliella) sauvagei de Loriol 1875
†Trigonia (Frenguelliella) tapiai Lambert 1944
†Trigonia (Frenguelliella) tealei Cox 1937
†Trigonia (Frenguelliella) truncata Agassiz 1840
Subg. †Trigonia (Indotrigonia) Dietrich 1933
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†Trigonia (Indotrigonia) beyschlagi Müller 1900
†Trigonia (Indotrigonia) smeei Sowerby 1840
Subg. †Trigonia (Pleurotrigonia) van Hoepen 1929
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†Trigonia (Pleurotrigonia) blanckenhorni Newton 1909
Subg. †Trigonia (Trigonia) Bruguiere 1789
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†Trigonia (Trigonia) angustecostata Behrendsen 1892
†Trigonia (Trigonia) elegantoides Körner 1937
†Trigonia (Trigonia) gaytani Klipstein 1843
†Trigonia (Trigonia) heva Dollfus 1863
†Trigonia (Trigonia) subcarinata Ebray 1863
†Trigonia (Trigonia) zlambachensis Haas 1909
†Trigonia sulcata Hector 1874
G. †Yaadia Crickmay 1930
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†Yaadia californiana Packard 1921
†Yaadia leana Gabb 1900
†Yaadia lewisagassizi Crickmay 1930
†Yaadia romanovskii Archangelski 1900
†Yaadia tryoniana Gabb 1864
Invalid names: Quadratotrigonia Dietrich 1933 [synonym], Steinmanella Crickmay 1930 [synonym], Transitrigonia Dietrich 1933 [synonym]
Fm. †Trigonioididae Cox 1952
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G. †Hoffetrigonia Suzuki 1940
G. †Trigonioides Kobayashi and Suzuki 1936