Wikipedia
Aacocrinus
Aacocrinus, also known as the feather star, is a genus of extinct sea lily from the Actinocrinitidae (or Patelliocrinidae) family. It has been shown that it was an attached stationary organism that blindly fed on passing organism. It was composed of Mg calcite and its habitat included the upper-level epifauna.
There are currently 14 species within this genus:
- Aacocrinus acylus (Webster & Jell 1999)
- Aacocrinus algeriaensis (Webster, Maples, Sevastopulo, Frest & Waters 2004)
- 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