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
Mon 2 March 2026
nominal species Calyculina rykoltii var. danica Clessin in Westerlund, 1873
Calyculina rykoltii var. danica Clessin in Westerlund, 1873 = nomen dubium
Clessin in Westerlund, 1873. Fauna Moll. Terr. Fluv. Suec. Norv. Dan. (2): 522.
(intro'd as intra-sp. of Cyclas rykoltii Normand, 1844)
Taxonomic Opinions
= Calyculina rykoltii var. danica Clessin — Clessin, 1877: 497, fig. 323.
