original descriptionPogorevich, V.V. (1977). Nekotoryye nemorskiye dvustvorki uglenosnoy permi Pechorskogo basseyna [Some non-marine bivalves from the coal-bearing Permian beds of the Pechora Basin]. <em>Trudy Instituta Geologii i Geofiziki, Sibirskoye Otdelniye, Akademiia Nauk SSSR.</em> 345: 44-70., available online athttps://www.geokniga.org/bookfiles/geokniga-novoe-o-faune-i-stratigrafii-srednego-i-pozdnego-paleozoya-sssr.pdf page(s): 62, pl. 20, fig. 13 [details] Available for editors