''Acar'' is a genus of small saltwater clams, marine

bivalve Bivalvia (), in previous centuries referred to as the Lamellibranchiata and Pelecypoda, is a class of marine and freshwater molluscs that have laterally compressed bodies enclosed by a shell consisting of two hinged parts. As a group, bival ...

mollusk Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is e ...

s in the family Arcidae, the ark clams. Some authors consider it to be a

subgenus In biology, a subgenus (plural: subgenera) is a taxonomic rank directly below genus. In the International Code of Zoological Nomenclature, a subgeneric name can be used independently or included in a species name, in parentheses, placed between t ...

of ''

Barbatia ''Barbatia'' is a genus of "bearded" ark clams, marine bivalve mollusks in the family Arcidae, the ark clams. This genus is known in the fossil record from the Jurassic period to the Quaternary period (age range: 167.7 to 0.0 million years ago) ...

''.

Species

Species in this genus include: *'' Acar abdita'' P. G. Oliver & Chesney, 1994 *'' Acar agulhasensis'' (Thiele, 1931) *'' Acar bailyi'' Bartsch, 1931 *'' Acar botanica'' (Hedley, 1917) *'' Acar carditaeformis'' (Dautzenberg & H. Fischer, 1897) *'' Acar clathrata'' (Defrance, 1816) *'' Acar congenita'' (E. A. Smith, 1885) *'' Acar decorata'' (Hayami & Kase, 1993) *'' Acar dubia'' (Baird, 1873) *'' Acar gradata'' (Broderip & G. B. Sowerby I, 1829), from California, US *'' Acar lepidoformis'' Francisco, Barros & S. Lima, 2012 *'' Acar marsupialis'' P. G. Oliver & Holmes, 2004 *'' Acar naturezae'' Francisco, Barros & S. Lima, 2012 *'' Acar oliveirae'' Francisco, Barros & S. Lima, 2012 *'' Acar olivercoseli'' M. Huber, 2010 *'' Acar petasion'' (Kilburn, 1983) *'' Acar plicata'' (Dillwyn, 1817) *'' Acar pusilla'' (G. B. Sowerby I, 1833) *'' Acar requiescens'' (Melvill & Standen, 1907) *'' Acar rostae'' (Berry, 1954) *'' Acar sandersonae'' Powell, 1933 *'' Acar sociella'' (Brookes, 1926) *'' Acar squamosa'' (Lamarck, 1819) *'' Acar transmar'' Simone, 2009, from Brazil Although Simone lists another species ''Acar domingensis'', it has been reclassified as Barbatia.

References

Arcidae Bivalve genera Taxa named by John Edward Gray {{Arcidae-stub