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nominal species Unio crassus heimburgi Haas, 1912

Unio crassus heimburgi Haas, 1912 = Unio crassus

(intro'd as intra-sp. of Unio crassus Philipsson in Retzius, 1788)
Haas, 1912. Verh. Naturhist. Ver. Preuß. Rheinl. 68: 527, pl. 6, fig. 20.
HOLOTYPE SMF 4389, Hatfeld, Germany.

Taxonomic Opinions

+ Unio crassus Philipsson, 1788 — Nagel, 2025: 114, fig. 60.

holotype SMF 4389/1 — Germany, “Hatzfeld” [Hatzfeld, 50°59.5’N 008°33’E] (coll. F. Haas, leg. F von Heimburg 1909)

paratypes SMF 10965/9

paratypes SMF 4390/8 (coll. F. Haas, leg. 1909)

paratypes SMF 10966/21 — “Battenfeld” (coll. F. Haas, leg. F. von Heimburg)

paratypes SMF 10962/8 — “Battenberg” (leg. J. Jüngst ix.1908)

paratypes SMF 10964/5 — “Eder” (leg. A. Rubbel 20.vi.1911)

paratypes SMF 10960/2 — “Efze” (leg. A. Rubbel)

paratypes SMF 10963/3 — “Nuhne” (leg. A. Rubbel 1911)

paratypes SMF 10961/1 — “Schwalm” (leg. L. Nick 24.vii.1911)

+ 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 — Haas, 1969: 45.

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