Brachiopoda

Productorthinae Schuchert et Cooper, 1931

Selection of related publications
Hints, L., Hints, O., Nemliher, R. & Nõlvak, J. 2007. Hulterstad brachiopods and associated faunas in the Vormsi Stage (Upper Ordovician, Katian) of the Lelle core, Central Estonia. Estonian Journal of Earth Sciences 56, 3, 131-142.
Hints, L. 1990. Ordovician articulate brachiopods.. Field Meeting Estonia 1990. An Excursion Guidebook. Eds: Kaljo, D. & Nestor, H., pp. 58-61.
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.
Oraspõld, A. L. 1959. Some representatives of the Superfamily Orthacea from the Upper Ordovician of Estonia. Tartu Riikliku Ülikooli Toimetised 75, I, 59-79. Töid Eesti NSV geoloogia alalt, I, pp. 59-79.
Oraspõld, A. L. 1956. New brachiopods from the Jõhvi, Keila and Vasalemma stages. Trudy Instituta geologii AN ESSR 1, 41-67.
Öpik, A. 1930. Brachiopoda Protremata der estländischen ordovizischen Kukruse-Stufe. Tartu Ülikooli Geoloogia Instituudi Toimetused 20, 1-261.