Classification of the subgenus Myalina (Orthomyalina)
Subg. †Myalina (Orthomyalina) Newell 1942
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†Myalina (Orthomyalina) ampla Meek and Hayden 1864
†Myalina (Orthomyalina) slocomi Sayre 1931
†Myalina (Orthomyalina) subquadrata Shumard 1855
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Invalid names: Myalina deltoidea Gabb 1859 [synonym]