Unionoidea | Unionidae | Ambleminae | Quadrulini | Quadrulina | Theliderma intermedia nominal species Quadrula biangulata Morrison, 1942
Morrison, 1942, Bulletin Bur. Amer. Ethnol. 129: 356.
Type(s): HOLOTYPE USNM_84221, Tuscumbia, Alabama.
= Theliderma intermedia Taxonomic Opinions
+ Theliderma intermedia (Conrad, 1836) — Lopes-Lima et al., 2019
+ Quadrula intermedia (Conrad, 1836) — Williams et al., 2008
+ Quadrula quadrula (Rafinesque, 1820) — Parmalee & Bogan, 1998
+ Quadrula tuberosa (Lea, 1840) — R.I. Johnson, 1980
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