• Acar J. E. Gray, 1857
• Acar abdita P. G. Oliver & Chesney, 1994
• Acar agulhasensis (Thiele, 1931)
• Acar asperula (Dall, 1881) accepted as Bentharca asperula (Dall, 1881)
• Acar bailyi Bartsch, 1931
• Acar bernardi Zelaya, Güller & Bieler, 2024
• Acar botanica (Hedley, 1917)
• Acar carditaeformis (Dautzenberg & H. Fischer, 1897)
• Acar celleporacea (Tate, 1886) †
• Acar clathrata (Defrance, 1816)
• Acar coma Cotton, 1947 †
• Acar congenita (E. A. Smith, 1885)
• Acar crustata (Tate, 1886) †
• Acar decorata (Hayami & Kase, 1993)
• Acar domingensis (Lamarck, 1819)
• Acar dubia (Baird, 1873)
• Acar dubia digma Iredale, 1939 accepted as Acar plicata (Dillwyn, 1817)
• Acar dubia kerma Iredale, 1939 accepted as Acar plicata (Dillwyn, 1817)
• Acar gradata (Broderip & G. B. Sowerby I, 1829)
• Acar gunsoni (Darragh & G. W. Kendrick, 1980) †
• Acar harringtoni Laws, 1947 †
• Acar hawaiensis Dall, Bartsch & Rehder, 1938 accepted as Acar plicata (Dillwyn, 1817)
• Acar iota Iredale, 1939 accepted as Acar congenita (E. A. Smith, 1885)
• Acar lamellosa (Deshayes, 1858) †
• Acar laysana Dall, Bartsch & Rehder, 1938 accepted as Acar plicata (Dillwyn, 1817)
• Acar lepidoformis Francisco, J. Barros & S. Lima, 2012
• Acar lyelli (Deshayes, 1829) †
• Acar marsupialis P. G. Oliver & A. M. Holmes, 2004
• Acar merope (A. d'Orbigny, 1850) †
• Acar millifila (Dall, 1903) † (uncertain > unassessed)
• Acar millifila latrinidadis (Maury, 1925) † (uncertain > unassessed)
• Acar naturezae Francisco, J. Barros & S. Lima, 2012
• Acar oliveirae Francisco, J. Barros & S. Lima, 2012
• Acar olivercoseli M. Huber, 2010
• Acar opuraensis (Bartrum & A. W. B. Powell, 1928) †
• Acar panamensis Bartsch, 1931 accepted as Acar gradata (Broderip & G. B. Sowerby I, 1829)
• Acar petasion (Kilburn, 1983)
• Acar plicata (Dillwyn, 1817)
• Acar powelli Laws, 1950 †
• Acar pulchella (Reeve, 1844) accepted as Acar clathrata (Defrance, 1816)
• Acar pusilla (G. B. Sowerby I, 1833)
• Acar putealis (Cox, 1952) †
• Acar requiescens (Melvill & Standen, 1907)
• Acar reticulata (Gmelin, 1791) (uncertain > nomen dubium)
• Acar reticulata sensu Suter, 1913 accepted as Acar sandersonae A. W. B. Powell, 1933
• Acar rostae (S. S. Berry, 1954)
• Acar salebrosus (Garvie, 1996) †
• Acar sandersonae A. W. B. Powell, 1933
• Acar scabra (Poli, 1795) accepted as Asperarca nodulosa (O. F. Müller, 1776)
• Acar simulans (Tate, 1886) †
• Acar sociella (Brookes, 1926)
• Acar somalica Selli, 1974 †
• Acar squamosa (Lamarck, 1819)
• Acar transmar Simone, 2009
• Acar whangaensis (Marwick, 1928) †
• Acara Heckel, 1840 accepted as Astronotus Swainson, 1839
• Acara adspersa Günther, 1862 accepted as Nandopsis tetracanthus (Valenciennes, 1831)
• Acara aequinoctialis Regan, 1905 accepted as Andinoacara rivulatus (Günther, 1860)
• Acara bartoni Bean, 1892 accepted as Herichthys bartoni (Bean, 1892)
• Acara coeruleopunctata Kner, 1863 accepted as Andinoacara coeruleopunctatus (Kner, 1863)
• Acara cognatus Heckel, 1840 accepted as Acaronia nassa (Heckel, 1840)
• Acara compressus Cope, 1872 accepted as Astronotus ocellatus (Agassiz, 1831)
• Acara crassa Steindachner, 1875 accepted as Hypselecara temporalis (Günther, 1862)
• Acara crassipinnis Heckel, 1840 accepted as Astronotus crassipinnis (Heckel, 1840)
• Acara cubensis Heckel, 1864 accepted as Nandopsis tetracanthus (Valenciennes, 1831)
• Acara curviceps Ahl, 1923 accepted as Laetacara curviceps (Ahl, 1923)
• Acara diadema Heckel, 1840 accepted as Aequidens diadema (Heckel, 1840)
• Acara dimerus Heckel, 1840 accepted as Cichlasoma dimerus (Heckel, 1840)
• Acara dorsiger Heckel, 1840 accepted as Laetacara dorsigera (Heckel, 1840)
• Acara flavescens (Heckel, 1840) accepted as Chaetobranchus flavescens Heckel, 1840
• Acara flavilabris Cope, 1870 accepted as Laetacara flavilabris (Cope, 1870)
• Acara freniferus Cope, 1872 accepted as Laetacara flavilabris (Cope, 1870)
• Acara geayi Pellegrin, 1902 accepted as Guianacara geayi (Pellegrin, 1902)
• Acara gronovii Heckel, 1840 accepted as Cichlasoma bimaculatum (Linnaeus, 1758)
• Acara guianensis Regan, 1905 accepted as Krobia guianensis (Regan, 1905)
• Acara gymnopoma Günther, 1862 accepted as Geophagus brasiliensis (Quoy & Gaimard, 1824)
• Acara heckelii Müller & Troschel, 1849 accepted as Acarichthys heckelii (Müller & Troschel, 1849)
• Acara hyposticta Cope, 1878 accepted as Astronotus ocellatus (Agassiz, 1831)
• Acara imperialis Steindachner, 1879 accepted as Uaru amphiacanthoides Heckel, 1840
• Acara lapidifera (Castelnau, 1855) accepted as Retroculus lapidifer (Castelnau, 1855)
• Acara latifrons Steindachner, 1878 accepted as Andinoacara latifrons (Steindachner, 1878)
• Acara marginatus Heckel, 1840 accepted as Cichlasoma dimerus (Heckel, 1840)
• Acara maronii Steindachner, 1881 accepted as Cleithracara maronii (Steindachner, 1881)
• Acara minuta Hensel, 1870 accepted as Geophagus brasiliensis (Quoy & Gaimard, 1824)
• Acara nassa Heckel, 1840 accepted as Acaronia nassa (Heckel, 1840)
• Acara pallidus Heckel, 1840 accepted as Aequidens pallidus (Heckel, 1840)
• Acara paraguayensis (Eigenmann & Kennedy, 1903) accepted as Bujurquina vittata (Heckel, 1840)
• Acara portalegrensis Hensel, 1870 accepted as Cichlasoma portalegrense (Hensel, 1870)
• Acara punctulata Günther, 1863 accepted as Crenicara punctulata (Günther, 1863)
• Acara punctulatus Günther, 1863 accepted as Crenicara punctulata (Günther, 1863)
• Acara rectangularis Steindachner, 1864 accepted as Chuco intermedium (Günther, 1862) accepted as Theraps intermedius (Günther, 1862)
• Acara sapayensis Regan, 1903 accepted as Andinoacara sapayensis (Regan, 1903)
• Acara spectabilis Steindachner, 1875 accepted as Caquetaia spectabilis (Steindachner, 1875)
• Acara subocularis Cope, 1878 accepted as Acarichthys heckelii (Müller & Troschel, 1849)
• Acara syspilus Cope, 1872 accepted as Bujurquina syspilus (Cope, 1872)
• Acara tetramerus Heckel, 1840 accepted as Aequidens tetramerus (Heckel, 1840)
• Acara thayeri Steindachner, 1875 accepted as Laetacara thayeri (Steindachner, 1875)
• Acara unicolor Heckel, 1840 accepted as Acaronia nassa (Heckel, 1840)
• Acara viridis Heckel, 1840 accepted as Aequidens viridis (Heckel, 1840)
• Acara vittatus Heckel, 1840 accepted as Bujurquina vittata (Heckel, 1840)