Classification of Wilson 1954

G. †Rhombella Bridge and Cloud 1947
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†Rhombella umbilicata Dake and Bridge 1932
Cl. †Trilobita Walch 1771 [trilobite]
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Fm. †Crepicephalidae Kobayashi 1935
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G. †Nasocephalus Wilson 1954
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†Nasocephalus nasutus Wilson 1954
G. †Geragnostus Howell 1935
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†Geragnostus rudis Salter 1864
G. †Coosia Walcott 1911
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†Coosia pernamagna Wilson 1954
Subfm. †Oleninae Burmeister 1843
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G. †Beltella Lake 1919
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†Beltella latifrons Wilson 1954