Classification of the family Syringothyrididae
Fm. †Syringothyrididae Fredericks 1926
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Subfm. †Permasyrinxinae Waterhouse 1986
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G. †Asyrinxia
G. †Cyrtella Fredericks 1924
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†Cyrtella allandalensis Armstrong 1970
†Cyrtella berriedalensis Waterhouse 1987
†Cyrtella campbelli Armstrong 1970
†Cyrtella erecta Waterhouse 1987
†Cyrtella furcata Waterhouse 1987
†Cyrtella granulata Armstrong 1970
†Cyrtella koopi Archbold 1990
†Cyrtella kulikiana Fredericks 1916
†Cyrtella nagmargensis Bion 1928
†Cyrtella nobilis Armstrong 1970
†Cyrtella rhombica Chen 2004
†Cyrtella subparallela Waterhouse 1987
†Cyrtella ulladullensis Armstrong 1970
Invalid names: Asyrinx [synonym], Punctocyrtella Plodowski 1968 [synonym]
G. †Permasyrinx
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†Permasyrinx procera Armstrong 1970
†Permasyrinx prolonga Waterhouse 1987
†Permasyrinx subelongata Waterhouse 1987
†Permasyrinx transversa Armstrong 1970
G. †Pseudosyringothyris Fredericks 1916
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†Pseudosyringothyris borealis Gobbett 1964
†Pseudosyringothyris karpinskii Fredericks 1916
†Pseudosyringothyris russiensis Zavodowsky 1968
†Pseudosyringothyris ustritskyi Kalashnikov 1981
G. †Subansiria Sahni and Srivastava 1956
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†Subansiria brevis Armstrong 1970
†Subansiria pelicanensis Armstrong 1970
†Subansiria ranganensis Sahni and Srivastava 1956
G. †Sulcicosta
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†Sulcicosta costata Waterhouse 1987
†Sulcicosta dolosus Waterhouse 1987
†Sulcicosta plicata Armstrong 1970
G. †Syrella Archbold 1996
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†Syrella elongata Armstrong 1970
†Syrella occidenta Archbold 1996
†Syrella plodowskii Waterhouse 1978
G. †Verkhotomia
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†Verkhotomia plenoides Sokolskaja 1963
†Verkhotomia stepanovi Zavodowsky 1968
†Verkhotomia tukulaensis Kashirtsev 1959
†Verkhotomia verkhotomica Sokolskaja 1963
Subfm. †Syringothyridinae Fredericks 1926
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G. †Syringothyris
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†Syringothyris afghanica Plodowski 1968
†Syringothyris arctica Whitfield 1908
†Syringothyris curzoni Diener 1903
†Syringothyris cuspidata Martin 1796
†Syringothyris lydekkeri Diener 1899
†Syringothyris subcuspidatoides Plodowski 1968