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Aequidens cf tetramerus.jpg
Aequidens tetramerus
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Perciformes
Family: Cichlidae
Subfamily: Cichlinae
Genus: Aequidens
C. H. Eigenmann & W. L. Bray, 1894
Type species
Acara tetramerus
Heckel, 1840

Aequidens is a genus of fish in the family Cichlidae found in South America. Formerly a wastebasket genus, as presently defined Aequidens is largely restricted to the Amazon Basin, Orinoco Basin and river basins in The Guianas. The only exceptions are A. plagiozonatus which also occurs in the Paraná Basin, and A. tetramerus which also occurs in the Parnaíba River.[1]


Many species formerly placed in this genus have been reallocated to other genera such as Andinoacara, Bujurquina, Cleithracara, Krobia, Laetacara, Rondonacara and Tahuantinsuyoa.[2]


There are currently 18 recognized species in this genus:[3][4][5][6]


  1. ^ Froese, Rainer, and Daniel Pauly, eds. (2016). Species of Aequidens in FishBase. October 2016 version.
  2. ^ Ottoni, F.P. & Mattos, J.L.O. (2015): Phylogenetic position and re-description of the endangered cichlid Nannacara hoehnei, and description of a new genus from Brazilian Cerrado (Teleostei, Cichlidae, Cichlasomatini). Vertebrate Zoology, 65 (1): 65-79.
  3. ^ Musilová, Z., Říčan, O. & Novák, J. (2009):Phylogeny of the Neotropical cichlid fish tribe Cichlasomatini (Teleostei: Cichlidae) based on morphological and molecular data, with the description of a new genus. Journal of Zoological Systematics and Evolutionary Research, 47 (3): 209-304.
  4. ^ Eschmeyer, W.N., & R. Fricke, eds. (2013). Catalog of Fishes Archived 2012-10-18 at the Wayback Machine.. Online version, 14 May 2013.
  5. ^ Froese, Rainer, and Daniel Pauly, eds. (2013). Species of Aequidens in FishBase. February 2013 version.
  6. ^ Wijkmark, N., Kullander, S.O. & Barriga S., R.E. (2012): Andinoacara blombergi, a new species from the río Esmeraldas basin in Ecuador and a review of A. rivulatus (Teleostei: Cichlidae). Ichthyological Exploration of Freshwaters, 23 (2): 117-137.
  7. ^ Hernández-Acevedo, J.H., Machado-Allison, A. & Lasso, C.A. (2015): Aequidens superomaculatum (Teleostei: Cichlidae) a new species from the upper Orinoco and Río Negro, Venezuela. Biota Colombiana, 16 (2): 96-106.