Bivalvia

Tancrediopsis Beushausen, 1895

Selection of related publications
Isakar, M., Sinitsyna, I. 1985. Redescription of E. Eichwald's Ordovician bivalve species. Eesti NSV Teaduste Akadeemia Toimetised. Geoloogia / Известия Академии наук Эстонской ССР. Геология 34, 2, 46-54.
Eichwald, E. 1856. Beitrag zur geographischen Verbreitung der fossilen Thiere Russlands. Alte Periode. (Fortsetzung. S. Bulletin 1856. N 2. pag. 406.). Bulletin of Moscow Society of Naturalists. Geology 29, IV, 555-608.