Echinodermata

Tetragonocrinus Yeltyschewa, 1964

Selection of related publications
Rozhnov, S. V. 1988. Morphology and systematic position of the Lower Ordovician crinoids. Paleontologicheski Zhurnal , 2, 67-79.
Yeltyscheva, R. S. 1964. Stebli ordovikskih morskih lilij Pribaltiki (nižnij ordovik). Voprosy paleontologii IV, 59-82.