Ostracoda

Haploprimitia Ulrich et Bassler, 1923

Selection of related publications
Sarv, L. I. 1956. New species of ostracodes of the Vasalemma Stage (Upper Ordovician of Estonia). ENSV TA Geoloogia Instituudi uurimused 1, 30-40.
Öpik, A. 1937. Ostracoda from the Ordovician Uhaku and Kukruse formations of Estonia. Tartu Ülikooli Geoloogia Instituudi Toimetused , 50, 1-58.
References based on distribution