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nominal species Unio batavus var. minimus de Joannis, 1859

Unio batavus var. minimus de Joannis, 1859 = Unio crassus

de Joannis, 1859. Ann. Soc. Linn. Maine-et-Loire 3: 289, pl. 9, fig. 6.
(intro'd as intra-sp. of Mya batava Maton & Rackett, 1807; homonym of Unio requienii var. minima Drouët, 1857)

Taxonomic Opinions

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

+ Unio crassus batavus (Maton & Rackett, 1807) — Haas, 1969: 48.

+ Unio crassus batavus (Maton & Rackett, 1807) — Haas, 1940: 130.

+ Unio mancus var. amnicus Ziegler — Germain, 1931: 726.

= Unio batavus var. minimus Nobis — de Joannis, 1859: 289, pl. 9, fig. 6.