Acar (bivalve)

Acar is a genus of small saltwater clams, marine bivalve mollusks in the family Arcidae, the ark clams.

Some authors consider it to be a subgenus of Barbatia.

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.