Classification of Rowell 1977

G. †Mickwitzia Schmidt 1888
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†Mickwitzia occidens Walcott 1908
G. †Kutorgina Billings 1861
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†Kutorgina perugata Walcott 1905
G. †Obolella Billings 1861
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†Obolella excelsis Walcott 1908
†Obolella vermilionensis Walcott 1912
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†Pompeckium argenteum Walcott 1905
G. †Swantonia Walcott 1905
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†Swantonia weeksi Walcott 1905
Fm. †Acrothelidae Schuchert 1893
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G. †Spinulothele Rowell 1977
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†Spinulothele dubia Walcott 1912