Bivalvia | ... | Unionidae | Unioninae | Unionini | Unionina | Unio nanus

nominal species Unio pseudocrassus Haas, 1909

Unio pseudocrassus Haas, 1909 = Unio nanus

Haas, 1909. Beitr. Kenntn. Mittleleurop. Najadeen, Beilage zu... 41: 29.
LECTOTYPE SMF 10991 (by Zilch, 1967: 57), Altrhein near Leimersheim, Germany.

Taxonomic Opinions

+ Unio nanus Lamarck, 1819 — Nagel, 2025: 137, fig. 108.

lectotype SMF 10991/1 (by Zilch, 1967: 57) — Germany, “im Oberrhein; der Typus stammt aus dem Altrhein von Leimersheim” [type locality 49°08’N 008°21.5’E] (coll. E.A. Rossmässler, leg. A. Braun)

paralectotype SMF 15833/1

paralectotype SMF 10993/1 — “Rheingau” (coll. F. Haas)

paralectotype 15.1272a — “Diluvium, Hessler, Wiesbaden-Biebrich” (coll. G.F. Kinkelin ex Dyckerhoff)

+ Unio nanus Lamarck, 1819 — Lopes-Lima et al., 2024: suppl. append. 2, p. 20.

= Crassiana pseudocrassa (Haas) — Gozhik, 2006: 191, pl. 9, fig. 3.

+ Unio crassus batavus Maton & Rackett — Haas, 1969: 51.

+ Unio crassus batavus (Maton & Rackett, 1807) — Haas, 1940: 131.

= Unio batavus pseudocrassus Haas — Kobelt & Haas, 1910: 40, pl. 469, fig. 2526.