Arcidae May 2026

: A long, straight hinge line with numerous small teeth.

Arcidae belongs to the superfamily within the order Arcoida . It is a highly species-rich family, with a conservative estimate of over 300 extant species worldwide. arcidae

: Many species possess numerous small pallial eyes along their mantle margin, particularly on the posterior side, providing light sensitivity. Lifestyles : They exhibit two main ecological habits: : A long, straight hinge line with numerous small teeth

Complete mitochondrial genome of Anadara vellicata (Bivalvia : Many species possess numerous small pallial eyes

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 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.

: Unlike most mollusks, Arcidae often contain hemoglobin in their hemocoel, giving them a red-colored body and the name "blood cockles". This adaptation may aid survival in low-oxygen environments like mud.