originoida
Originoida is a taxonomic order within the class Bivalvia, encompassing a diverse group of saltwater clams. These bivalves are characterized by their relatively equivalve shells, meaning both shells are generally equal in size and shape, though variations can occur. The hinge ligament is typically opisthodetic, meaning it is located behind the hinge itself. Many species within Originoida are infaunal, meaning they live buried within the seafloor sediments, ranging from mud and sand to gravel. They achieve this by using a strong, muscular foot to burrow.
The feeding strategy of Originoida members is primarily filter-feeding. They use their siphons to draw in water,