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nominal species Unio pseudolittoralis [sic] var. curonicus Riemenschneider, 1907

Unio pseudolittoralis [sic] var. curonicus Riemenschneider, 1907 = Unio crassus

Riemenschneider, 1907. Nachr. Bl. Dtsch. Malak. Ges. 39: 150.
(intro'd as intra-sp. of Unio pseudolitoralis Clessin, 1877)

Taxonomic Opinions

+ Unio crassus Philipsson in Retzius, 1788 — Lopes-Lima et al., 2024: suppl. append. 2, p. 9.

+ Unio (Crassiana) crassus Retzius, 1788 — Vinarski & Kantor, 2016: 25.

+ Unio crassus crassus Retzius, 1788 — Haas, 1969: 45.

+ Unio crassus crassus Retzius, 1788 — Haas, 1940: 129.