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Small Tube-Building Fauna (Biotic Group)

Component: Biotic

Unique Identifier: 539

Biotic Setting Benthic/Attached Biota
Biotic Class Faunal Bed
Biotic Subclass Soft Sediment Fauna
Biotic Group Small Tube-Building Fauna
Biotic Community Thin Ampelisca Bed
Paraprionospio Bed
Polydora Bed
Streblospio Bed
Chone Bed


Description
Definition Soft sediment areas dominated by tube-building annelids (e.g., spionids, sabellids), amphipods, small phoronids, or other small, surface-dwelling, tube-building fauna. These animals have a small tube width (< 2 millimeters), and the tubes often occur in dense mats. The animal itself may reside above or below the sediment surface within the constructed tube, which may be composed of a variety of materials (e.g., glued sediments, calcium carbonate, mucus, chitin, proteins).