Bivalvia

Palaeoheterodonta Newell, 1965

Selection of related publications
Kisselev, G. N., Sinitsyna, I. N., Isakar, M. A., Mironova, M. G. & Saladzhius, V. Y. 1990. Atlas of Upper Ordovician and Silurian molluscs from the nort-western part of East-European platform. .
Isakar, M. & Sinitsyna, I. 1985. Redescription of E. Eichwald's Ordovician bivalve species. Proceedings of the Academy of Sciences of the Estonian SSR. Geology 34, 2, 46-54.
Bekker, H. 1921. The Kuckers Stage of the Ordovician Rocks in NE Estonia. Acta Univ. Tartu A II, 1, 1-90.