MUSSELpdb
Taxonomy
Species & Genus Richness of
freshwater mussels
by Taxonomy
Species & Genus Richness of
freshwater bivalves
by Family
Geography
Species Richness & Endemism of
freshwater mussels
by Geography
Data last updated
Fri 13 February 2026
Bivalvia | ... | Unionidae | Unioninae | Unionini | Unionina | Unio mancus
nominal species Unio requienii var. rhyncoideus de Joannis, 1859
Unio requienii var. rhyncoideus de Joannis, 1859 = Unio mancus
de Joannis, 1859. Ann. Soc. Linn. Maine-et-Loire 3: 290, pl. 11, fig. 1.
(intro'd as intra-sp. of Unio requienii Michaud, 1831)
Taxonomic Opinions
+ — Germain, 1904: 269, footnote.
= Unio requienii var. rhyncoideus Nobis — de Joannis, 1859: 290, pl. 11, fig. 1.
