Arca Temporal range:
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Internal view of a valve of Arca zebra | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Mollusca |
Class: | Bivalvia |
Order: | Arcida |
Family: | Arcidae |
Genus: | Arca Linnaeus, 1758 |
Species | |
23 described species |
Arca is a genus of saltwater clams in the family Arcidae, the ark clams.
As is typical for ark clams, species in this genus have a long, straight hinge line. Some species in this genus, such as Arca zebra and Arca noae, have a brown-and-white striped pattern. Arca attach themselves to rock with byssal threads which protrude through a gap on the ventral (open) side.
Species within the genus Arca include:[1]