Classification of the family Stomachetosellidae
Fm. Stomachetosellidae Canu and Bassler 1917
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G. Diastosula Canu and Bassler 1927
G. Leiosella
G. †Metrocrypta
G. Pachyegis Osburn 1952
G. Posterula Jullien 1903
G. Ragionula Canu and Bassler 1927
G. †Schizemiella