''Aequipecten tehuelchus'' is a species of

bivalves Bivalvia () or bivalves, in previous centuries referred to as the Lamellibranchiata and Pelecypoda, is a class of aquatic molluscs (marine and freshwater) that have laterally compressed soft bodies enclosed by a calcified exoskeleton consis ...

belonging to the family

Pectinidae Scallop () is a common name that encompasses various species of Marine (ocean), marine bivalve mollusc, molluscs in the Taxonomy (biology), taxonomic Family (biology), family Pectinidae, the scallops. However, the common name "scallop" is also ...

. The species is found in South America. Its shell changes shape and size in three different stages throughout its lifetime: spat, juvenile, and adult.

References

Pectinidae Bivalves described in 1842 Molluscs of South America {{Pectinidae-stub