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Chitons (Biotic Group)

Component: Biotic

Unique Identifier: 1281

Biotic Setting Benthic/Attached Biota
Biotic Class Faunal Bed
Biotic Subclass Attached Fauna
Biotic Group Chitons
Biotic Community Attached Acanthopleura
Attached Katharina
Attached Nutallina

Definition Areas dominated by attached chitons, gastropod-like mollusks with eight calcareous dorsal plates (valves), a broad foot for attachment to hard substrates, and a scraping radula for feeding. Several species can reach high abundances on intertidal or subtidal rocks. Some chitons will create a depression in rock substrate for improved protection; however, they are classified here as Chitons, rather than above as Mineral Boring Fauna.