-
extinct Ordovician (Darriwilian,
Sandbian & Katian)
North America : 363
Archaeoisocrinus Webster & Jell 1999 A.
occiduaustralis Webster & Jell, 1999 Isocrinidae...
-
Hypalocrinus A.H.Clark, 1908 (1 sp.)
Neocrinus Thomson, 1864 (2 spp.) †?
Archaeoisocrinus Webster and Jell 1999 †Balanocrinus Ag****iz 1847 †Chariocrinus Hess...
- †Archaeocalyptocrinus †Archaeocidaris †Archaeocothurnus †Archaeocrinus †
Archaeoisocrinus †Archaeometra †Archaeophiomusium †Archaepyrgus †Archaetaxocrinus †Archaster...