Hammer oyster | |
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Scientific classification ![]() | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Mollusca |
Class: | Bivalvia |
Order: | Pteriida |
Superfamily: | Pterioidea |
Family: | Malleidae |
Genera | |
See text |
Malleidae, or hammer oysters, is a family of saltwater clams. They are related to the pearl oysters, in the order Pteriida[1] and the superfamily Pterioidea. There are about 22 species in this family.
The shells of most of these animals are T-shaped, with the hinge along the top of the T, and with the byssus emerging from the hinge. An oblique ligament holds the hinge. The shell is partially nacreous. There is a single, large adductor muscle. The exhalant current exits at the hinge.
Most hammer oysters live in tropical, coralline areas.