NOMENCLATORIAL NOTE: Sievertsella, a replacement name for Sievertsia RADWAŃSKA, 1987 (Echinodermata, Crinoidea), preoccupied by Sievertsia SMITH & PAUL, 1982 (Echinodermata, Cyclocystoidea)
Authors
Urszula Radwańska
Institute of Geology, University of Warsaw, Al. Żwirki i Wigury 93; PL-02-089 Warszawa
