Sigillatocrinus Skukalina 1980

Skukalina 1980. [New species of cystoids and crinoids from the Ordovician and Lower Silurian of central Kazakhstan and north Kirgizia.] Novye Vidy Drevnikh Rastenii i Bespozvonochnykh SSSR, No. 5 1980: 95-114