Bivalvia

Protobranchia Pelseneer, 1889

Selection of related publications
Hinz-Schallreuter, I. 1995. Middle Cambrian Bivalvia from Bornholm and a review of Cambrian bivalved Mollusca. Geschiebekunde aktuell 11, 3, 71-85.
Isakar, M. 1991. Harjuan (Late Ordovician) new Bivalves and a new Gastropod from North Estonia. Acta et Commentationes Universitatis Tartuensis 934, 43-60. Eesti Ordoviitsiumi paleontoloogia ja stratigraafia, pp. 43-60.
Kiselev, 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. Eesti NSV Teaduste Akadeemia Toimetised. Geoloogia / Известия Академии наук Эстонской ССР. Геология 34, 2, 46-54.
Soot-Ryen, H. 1964. Nuculoid ppelecypods from the Silurian of Gotland. Arkiv för Mineralogi och Geologi 3, 28, 489-519.
Bekker, H. 1921. The Kuckers stage of the Ordovician Rocks in NE Estonia. Acta et Commentationes Universitatis Tartuensis II, 1, 1-90.