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Fossilized shell fragments of Psammobia fervensis
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See text. Molluscs are animals belonging to the phylum Mollusca. There are around 250000 extant Species within the phylum with an estimated 70000 Bivalves are Molluscs belonging to the class Bivalvia. They have two-part shells and typically both valves are symmetrical along the hinge line Heterodonta is a Mollusc subclass in the class Bivalvia and contains the orders † Cycloconchidae, † Hippuritoida (rudists † Lyrodesmatidae The Veneroida or veneroids are an order of Bivalve Molluscs They include some familiar forms such as saltwater Clams and |
Psammobiidae or sunset clams, are a family of medium-sized saltwater clams, marine bivalve molluscs of the order Veneroida. In Biological classification, family ( Latin Marine is an Umbrella term. As an adjective it is usually applicable to things relating to the Sea or Ocean, such as Marine biology, Marine Bivalves are Molluscs belonging to the class Bivalvia. They have two-part shells and typically both valves are symmetrical along the hinge line Molluscs are animals belonging to the phylum Mollusca. There are around 250000 extant Species within the phylum with an estimated 70000 The Veneroida or veneroids are an order of Bivalve Molluscs They include some familiar forms such as saltwater Clams and
The shells are moderately lasrge, elongate-ovate, rather thin, resembling the tellinids but without the posterior twist. Tellinidae is a family of bivalve Molluscs of the order Veneroida. The hinge has one to three cardinal teeth but no laterals. The ligament is long, external, and the pallial sinus is very large, extending almost two thirds way across the shell.
They are found in most tropical and temperate seas, in shallow water, buried in sand or mud. The Tropics are centered on the Equator and limited in Latitude by the Tropic of Cancer in the northern hemisphere at approximately 23°26' (23