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nominal species Unio crassus heimburgi Haas, 1911

Unio crassus heimburgi Haas, 1911 = Unio crassus

Haas, 1911. Verh. Naturhist. Ver. Preuß. Rheinl. 68: 527, pl. 6, fig. 20.
(intro'd as intra-sp. of Unio crassus Philipsson in Retzius, 1788)

= Unio crassus

Taxonomic Opinions

+ Unio crassus Philipsson in Retzius, 1788 — Lopes-Lima et al., 2024

+ Unio (Crassiana) crassus Retzius, 1788 — Vinarski & Kantor, 2016

+ Unio crassus crassus Retzius, 1788 — Haas, 1969

+ Unio crassus crassus Retzius, 1788 — Haas, 1940