Unionoidea | Unionidae | Ambleminae | Quadrulini | Quadrulina | Theliderma cylindrica nominal species Unio cilindricus [sic] var. propetipicus de Gregorio, 1914
de Gregorio, 1914, Il Nat. Siciliano 2: 41, pl. 4, figs. 1a-b.
(intro'd as intra-sp. of Unio cylindricus Say, 1817)
= Theliderma cylindrica Taxonomic Opinions
+ Theliderma cylindrica (Say, 1817) — Lopes-Lima et al., 2019
+ Quadrula cylindrica cylindrica (Say, 1817) — Watters et al., 2009
= Unio cilindricus [sic] var. propetipicus de Greg. — de Gregorio, 1914
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