Conodonta

Polyplacognathidae Bergström, 1981

Selection of related publications
Männik, P., Viira, V. 2012. Ordovician conodont diversity in the northern Baltic. Estonian Journal of Earth Sciences 61, 1, 1-14. DOI:10.3176/earth.2012.1.01
Hints, O., Viira, V., Nõlvak, J. 2012. Darriwilian (Middle Ordovician) conodont biostratigraphy in NW Estonia. Estonian Journal of Earth Sciences 61, 4, 210-226. DOI:10.3176/earth.2012.4.03
Viira, V. 2011. Lower and Middle Ordovician conodonts from subsurface of SE Estonia and adjacent Russia. Estonian Journal of Earth Sciences 60, 1, 1-21. DOI:10.3176/earth.2011.1.01
Sjöstrand, L. L. M. 2003. Early to early Middle Ordovician conodont biostratigraphy of the Tamsalu drill core, central Estonia. Examensarbeite i geologi vid Lunds Universitet , 156, 1-20.
Viira, V., Löfgren, A., Mägi, S., Wickström, J. 2001. An Early to Middle Ordovician succession of conodont faunas at Mäekalda, northern Estonia. Geological Magazine 138, 6, 699-718. DOI:10.1017/S0016756801005945
Männik, P., Viira, V. 1990. Conodonts. Field Meeting Estonia 1990. An Excursion Guidebook. Eds: Kaljo, D. & Nestor, H., pp. 84-90.
Löfgren, A. 1978. Arenigian and Llanvirnian cocodonts from Jämtland, northern Sweden. Fossils and Strata 13, 1-129.
Viira, V. 1974. Ordovician conodonts of the East Baltic.
Viira, V. 1967. Ordovician conodont succession in the Ohesaare core. Proceedings of the Academy of Sciences of the Estonian SSR. Chemistry and Geology 16, 4, 319-329.