: Maximum species diversity occurs in the Indo-West Pacific region, where over 180 valid species in more than 30 genera are recorded. Regional Presence : Tropical West Africa : ~27 species. West Atlantic : ~20 species. Northeastern Atlantic : ~10 species.
: A long, straight hinge line with numerous small teeth. arcidae
Ark shells are distinguished by several unique biological features that allow them to thrive in varied benthic environments: : Maximum species diversity occurs in the Indo-West