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.
Taxonomy Many species formerly placed in this genus have been reallocated to other genera such as Andinoacara, Bujurquina, Cleithracara, Krobia, Laetacara, Rondonacara and Tahuantinsuyoa.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.
Species There are currently 18 recognized species in this genus:Musilová, Z., Říčan, O. & Novák, J. (2009): Journal of Zoological Systematics and Evolutionary Research, 47 (3): 209-304.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.
Aequidens chimantanus Inger, 1956 Aequidens diadema (Heckel, 1840) Aequidens epae S. O. Kullander, 1995 Aequidens gerciliae S. O. Kullander, 1995 Aequidens mauesanus S. O. Kullander, 1997 Aequidens metae C. H. Eigenmann, 1922 Aequidens michaeli S. O. Kullander, 1995 Aequidens pallidus (Heckel, 1840) (Doublespot acara) Aequidens paloemeuensis S. O. Kullander & Nijssen, 1989 Aequidens patricki S. O. Kullander, 1984 Aequidens plagiozonatus S. O. Kullander, 1984 Aequidens pirilampo Oliveira et al., 2024Oliveira, Rianne Caroline de & Luiz Fernando Caserta Tencatt, Gabriel de Carvalho Deprá, Ricardo Britzke, Claudio Oliveira, Júnio da Graça, Weferson. 2024. "A new species of Aequidens (Cichliformes: Cichlidae) from the rio Paraguai basin, Brazil". Neotropical Ichthyology. 22(2):e230106. DOI: 10.1590/1982-0224-2023-0106 Aequidens potaroensis C. H. Eigenmann, 1912 Aequidens rondoni (A. Miranda-Ribeiro, 1918) Aequidens superomaculatum Hernández-Acevedo, Machado-Allison & Lasso A., 2015Hernández-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. Aequidens tetramerus (Heckel, 1840) (Saddle cichlid) Aequidens tubicen S. O. Kullander & E. J. G. Ferreira, 1991 Aequidens viridis (Heckel, 1840)
References