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
Wed 04 February 2026
Bivalvia | Cardiida | Cardioidea | Cardiidae | Didacna protracta
nominal species Adacna protracta Eichwald, 1841
Adacna protracta Eichwald, 1841 = Didacna protracta
Eichwald, 1829. Zool. Spec. Rossiae 1: 283, pl. 5, fig. 9 [as ‘Cardium protractum’].
Eichwald, 1841. Nouv. Mém. Soc. Imp. Nat. Moscou 7: 280, pl. 40, figs. 10-11.
Taxonomic Opinions
= Didacna protracta (Eichwald, 1841) — Wesselingh et al., 2019
= Didacna protracta (Eichwald, 1841) — Vinarski & Kantor, 2016
= Didacna protracta protracta (Eichwald, 1841) — Kantor et al., 2010
= Didacna protracta (Eichwald, 1841) — Zhadin, 1965
+ Cardium catillus Eichw. — Grimm, 1877
