Hiatella

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Hiatella
A single valve of Hiatella arctica (left), and an entire bivalve shell of a smaller individual with brownish periostracum,
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Bivalvia
Order:	Adapedonta
Family:	Hiatellidae
Genus:	Hiatella(Bosc, 1801)
See text
Agina Turton, 1822
Biapholius Lamarck, 1818
Byssomia Say, 1818
Byssomya Oken, 1817
Byssonia Blainville, 1817
Coramya Brown, 1844
Didonta Schumacher, 1817
Pholeobia Leach in Ross, 1819
Saxicava Bellevue, 1802
Spongyophylla Brusina, 1866

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Hiatella is a genus of small saltwater clams, marine bivalve molluscs in the family Hiatellidae.

These bivalves are stationary suspension feeders. Some species bore into rock for shelter, others also live in rock but do not bore, instead they nestle in holes created by other organisms, or in other crevices. They may also live nestled within the holdfasts of kelps, within other organisms such as sponges, or partly buried in a sandy sediment.

The number of species in the genus is unclear, and their unequivocal identification can be difficult. The following species are listed in MolluscaBase/WoRMS (2015):

• Hiatella antarctica (Philippi, 1845)
• Hiatella arctica (Linnaeus, 1767) (= Hiatella striata (Fleuriau, 1802) = Hiatella pholadis (Linnaeus, 1771))
• Hiatella arenacea (E.A. Smith, 1910)
• Hiatella australis (Lamarck, 1818)
• Hiatella azaria Dall, 1881
• Hiatella rugosa (Linnaeus, 1767) (= Hiatella gallicana (Lamarck, 1818))
• Hiatella glaciana
• Hiatella pholadis
• Hiatella striata

By molecular data, at least 13 different species of Hiatella were distinguished, but the correspondence between those taxa and the formal species names was not resolved.

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