| 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 edible saltwater clams in the family Arcidae, the Ark Clams. [1]
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: [2]
Bulla is a genus of medium to large hermaphrodite sea snails, shelled marine opisthobranch gastropod molluscs. These herbivorous snails are in the suborder Cephalaspidea, headshield slugs, and the order Opisthobranchia.
Barbatia is a genus of "bearded" ark clams, marine bivalve mollusks in the family Arcidae, the ark clams.
Buccinum is a genus of medium-sized sea snails, marine gastropod molluscs in the family Buccinidae, the true whelks.
Anadara is a genus of saltwater bivalves, ark clams, in the family Arcidae. It is also called Scapharca.
Siphonaria is a genus of air-breathing sea snails or false limpets, marine pulmonate gastropod molluscs in the family Siphonariidae, the false limpets.
Cardita is a genus of marine bivalve molluscs in the family Carditidae.
Bursa is a genus of large sea snails, marine gastropod molluscs in the family Bursidae, the frog snails or frog shells.
Patella is a genus of sea snails with gills, typical true limpets, marine gastropod mollusks in the family Patellidae, the true limpets.
Fissurella is a genus of small to medium-sized sea snails or limpets, marine gastropod mollusks in the subfamily Fissurellinae of the family Fissurellidae, the keyhole limpets.
Columbella is a genus of small sea snails, marine gastropod mollusks in the family Columbellidae, the dove snails.
Nassa is a genus of sea snails, marine gastropod mollusks in the subfamily Rapaninae of the family Muricidae, the murex snails or rock snails.
Ovula is a genus of sea snails, marine gastropod mollusks in the family Ovulidae.
Fulvia is a genus of cockles, marine bivalve molluscs in the family Cardiidae. Most species are found in the Indo-Pacific and in Australian waters.
Floraconus is a subgenus of sea snails, marine gastropod mollusks in the genus Conus, family Conidae, the cone snails and their allies.
Acrosterigma is a genus of large saltwater clams or cockles, marine bivalve mollusc in the family Cardiidae, the cockles.
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