Aaglacrinus
Aaglacrinus is an extinct genus of crinoidea in the Cladia order. It has been proposed that it was a stationary suspension feeder the hard parts of which were composed of magnesium calcite.
Species
There are currently two species in this genus, both of which are under the name Aaglaocrinus:Aaglaocrinus bowsheri- ''Aaglaocrinus sphaeri''