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...
Found on http://en.wikipedia.org/wiki/Aacocrinus
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