Aplacophora

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iAplacophora
Scientific classification
Kingdom: Animalia Subkingdom: Metazoa Phylum: Mollusca Class: Aplacophora
Subclasses and families
Subclass Chaetodermomorpha (Caudofoveata) Chaetodermidae Falcidentidae Limifossoridae Metachaetodermatidae Prochaetodermatidae Scutopidae Subclass Neomeniomorpha (Solenogastres) Acanthomeniidae Amphimeniidae Dondersiidae Drepanomeniidae Epimeniidae Gymnomeniidae Hemimeniidae Heteroherpiidae Imeroherpiidae Lepidomeniidae Macellomeniidae Meiomeniidae Neomeniidae Perimeniidae Phyllomeniidae Proneomeniidae Rhipidoherpiidae Rhopalomeniidae Sandalomeniidae Simrothiellidae Strophomeniidae Syngenoherpiidae

Aplacophora is a class of exclusively benthic marine mollusks found in all oceans of the world. The family comprises 28 families and about 320 species. They are small (no longer than 5 cm), cylindrical and worm-like. They can however reach a length of 30 cm.

[edit] Habitat

Aplacophorans mainly burrow into the substrate in water regions deeper than 20 m. These species may reach densities up to 4 or 5 specimens per m².

[edit] Taxonomy

This class was once classified as sea cucumbers in the echinoderms. In 1987, they were officially recognized as mollusks and given their own class.