Heterodonta is a taxonomic subclass of saltwater clams, marine bivalve molluscs. A cockle is an edible, marine bivalve mollusc. Many marine invertebrates such as bivalve molluscs are filter feeders. Some species that prey on bivalve molluscs can transmit paralytic shellfish poisoning. Invertebrates including cephalopods, crustaceans, and bivalve or gastropod molluscs are hunted or farmed for food. Donax is a genus of small, edible saltwater clams, marine bivalve molluscs. The Pteriomorphia comprise a subclass of saltwater clams, marine bivalve molluscs. Scallops are the family Pectinidae, marine bivalve molluscs within the superfamily Pectinoidea. Doubly uniparental inheritance of mtDNA is observed in bivalve mollusks. Clam is a common name for several kinds of bivalve molluscs. The veliger is the characteristic larva of the gastropod, bivalve and scaphopod taxonomic classes. Animals boring into the rock include sponges, bivalve mollusks, and sipunculans. He studied click beetles ("Pyrophorus") and the marine bivalve mollusc "Pholas dactylus". The large, heavy beak is used to pry open bivalve mollusks. The age of bivalve molluscs can be estimated in several ways.