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 caffer
nominal species Unio gratiosus ‘Parreiss in sched.’ Küster, 1861
Unio gratiosus ‘Parreiss in sched.’ Küster, 1861 = Unio caffer
‘Parreiss in sched.’ Küster, 1861. Conchyl. Cab. 9(2): 239, pl. 80, fig. 3.
(homonym of Unio gratiosus Philippi, 1842)
Taxonomic Opinions
+ Unio diminutus Lea, 1859 — Pilsbry & Bequaert, 1927: 380.
+ Unio diminutus Lea, 1859 — Jickeli, 1874: 280.
= Unio gratiosus Parreiss — Küster, 1861: 239, pl. 80, fig. 3.
