Classification of the family Theodossiidae

Fm. †Theodossiidae Ivanova 1959
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Subfm. †Branikiinae Johnson and Hou 1994
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G. †Branikia
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Invalid names: Bidentatus [synonym]
G. †Lenzia Perry et al. 1981
Subfm. †Theodossiinae Ivanova 1959
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Invalid names: Pinghuangella [synonym]
G. †Theodossia Nalivkin 1925
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†Theodossia sinensis Wang 1985
G. †Urella
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Invalid names: Retzispirifer [synonym]