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

nominal species Unio crassus var. maximus Kobelt, 1872

Unio crassus var. maximus Kobelt, 1872 = Unio crassus

(intro'd as intra-sp. of Unio crassus Philipsson in Retzius, 1788; homonym of Unio pictorum maxima Mørch, 1863)
Rossmässler, 1853. Zeitschr. f. Malakozool. 10: 92 [as ‘Unio litoralis’].
Kobelt, 1872. Malak. Blatt. 19: 142, pl. 5.
Kobelt, 1884. Icon. Land- und Süssw.-Moll. 1: 67, pl. 29, figs. 218-219.
LECTOTYPE SMF 10967 (by Zilch, 1967: 53), in a stream near Aller, Denmark.

Taxonomic Opinions

+ Unio crassus Philipsson, 1788 — Nagel, 2025: 129, fig. 90.

lectotype SMF 10967/1 (by Zilch, 1967: 53-54) — Denmark, “in der Aller, einem Bach zwischen Kolding und Hadersleben” [correct: “in einem Bache bei Aller”..., 55°21.5’N 009°31.5’E] (coll. E.A. Rossmässler vi.1855, leg. H. Achtnich)

paralectotype SMF 10968/1

paralectotype SMF 10969/1v

paralectotypes SMF 10970/14

+ Unio crassus Philipsson in Retzius, 1788 — Lopes-Lima et al., 2024: suppl. append. 2, p. 4.

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

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

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

= Unio crassus var. maximus Kobelt, 1872 — Kobelt, 1884: 67, pl. 29, figs. 218-219.

+ Unio batavus var. pseudo-litoralis Clessin — Clessin, 1877: 469.