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nominal species Unio batavus hexameri Haas, 1912

Unio batavus hexameri Haas, 1912 = Unio nanus

(intro'd as intra-sp. of Mya batava Maton & Rackett, 1807)
Haas, 1912. Verh. Naturhist. Ver. Preuß. Rheinl. 68: 526, pl. 4, fig. 2.
HOLOTYPE SMF 11001, Modau River, Germany.

Taxonomic Opinions

+ Unio nanus Lamarck, 1819 — Nagel, 2025: 116, fig. 63.

holotype SMF 11001/1 — “Modau” Germany (coll. E.A. Rossmässler ex Hexamer xi.1843)

paratypes SMF 11002/6 — “Johannisbach”

+ Unio nanus Lamarck, 1819 — Lopes-Lima et al., 2024: suppl. append. 2, p. 21.

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

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