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Attached Crinoids (Biotic Group)

Component: Biotic

Unique Identifier: 511

Biotic Setting Benthic/Attached Biota
Biotic Class Faunal Bed
Biotic Subclass Attached Fauna
Biotic Group Attached Crinoids
Biotic Community Attached Comanthus
Attached Diplocrinus


Description
Definition Assemblages on hard or mixed substrates that are dominated by either attached, stalked crinoids (or "sea lilies") or motile (but often stationary, see Barnes 1980), comatulid (or "feather stars"). These animals are common in the deep sea and in other areas. Crinoids are a Class of echinoderm characterized (in general) by a stalk that supports the body, mouth, and arms of the animal. The branching arms are equipped with ciliated grooves that carry food items to the central, upward-facing mouth.