Classification of the genus Portlandella
Subg. †Megayoldia (Portlandella) Stewart 1930
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†Megayoldia (Portlandella) pilvoensis Slodkewitsch 1938
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Invalid names: Yoldia obtusata Kristofovich 1984 [synonym]
†Megayoldia (Portlandella) watasei Kanehara 1937
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Invalid names: Yoldia deformis Kogan 1939 [synonym]
†Portlandia (Portlandella) euthynta Woodring 1973
†Portlandia (Portlandella) reagani Dall 1922