Brachiopoda

Orthis Dalman, 1828

Selection of related publications
Rubel, M. P. 1961. Lower-Ordovician brachiopods of the superfamilies Orthacea, Dalmanellacea and Syntrophiacea of Eastern Baltic. Trudy Instituta geologii AN ESSR 6, 141-226. ENSV Teaduste Akadeemia Geoloogia Instituudi Uurimused VI, pp. 141-226.
Öpik, A. 1927. Beiträge zur Kenntnis der Kukruse-(C2-) Stufe in Eesti. II. Tartu Ülikooli Geoloogia Instituudi Toimetused , 10, 1-35.
Bekker, H. 1921. The Kuckers stage of the Ordovician Rocks in NE Estonia. Acta Univ. Tartu A II, 1, 1-90.
References based on distribution