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nominal species Unio crassus var. ishmensis Zhadin, 1938

Unio crassus var. ishmensis Zhadin, 1938 = Unio crassus

Zhadin, 1938. Faune USSR Mollusques 4(1): 160.
(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

= Unio (s.s.) crassus var. ishmensis Zhadin, 1938 — Zhadin, 1938