https://species.wikimedia.org/wiki/Category:Fedor_Nikolaevich_Pravdin_taxa
Category:Fedor Nikolaevich Pravdin taxa - Wikispecies
categoryfedortaxawikispecies
https://eunis.eea.europa.eu/species/314410
Coregonus ladogae - Pravdin, Golubev & Belyaeva, 1938
Coregonus ladogae belongs to the Fishes group