Unionoida | Unionoidea | Unionidae | Ambleminae | Pleurobemini | Plethobasus cyphyus nominal species Unio cicatricosus Conrad, 1834
‘Say’ Conrad, 1834, New Fresh-Water Shells: ??.
‘Say’ Conrad, 1840, Monogr. Fam. Unionidae 2(13): 115, pl. 64.
(misidentified reference to Unio cicatricosus Say, 1829)
= Plethobasus cyphyus Taxonomic Opinions
+ Margaron (Unio) æsopus (Green) — Lea, 1870
+ Margaron (Unio) æsopus (Green) — Lea, 1852
+ Margarita (Unio) aesopus Green — Lea, 1838
+ Margarita (Unio) aesopus (Green, 1827) — Lea, 1836
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