Aacocrinus is a genus of extinct sea lily from the family Actinocrinitidae.
There are currently 14 species within this genus:
Aacocrinus acylus (Webster & Jell 1999) Aacocrinus algeriaensis (Webster, Maples, Sevastopulo, Frest & Waters 2004)Carboniferous (Visean-Moscovian) echinoderms from the Bechar Basin area of western Algeria. Bulletins of American Paleontology, 368, December 30, 2004: 1-98. [Zoological Record Volume 142] Aacocrinus boonensis Aacocrinus chouteauensis Aacocrinus enigmaticus (Webster & Lane 1987) Aacocrinus milleri Aacocrinus nododorsatus (Bowsher 1955) Aacocrinus protuberoarmatus (Missouri) Aacocrinus sampsoni Aacocrinus senectus Aacocrinus spinosulus Aacocrinus spinulosus Aacocrinus tetradactylus (Missouri) Aacocrinus triarmatus
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