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Library > Cichlids > General Articles > Taxonomy of Cichlids > Sub Family cichlasomatiene > Genera Aequidens> Aequidens mauesanus
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Species Aequidens mauesanus  
Scientific classification
Kingdom : Animalia
Phylum : Chordata
Class : Actinopterygii
Order : Perciformes
Suborder : Labroidei
Family : Cichlidae
Sub Family : cichlasomatiene
Genus : Aequidens
Scientific Name : Aequidens mauesanus
Common Name : Aequidens mauesanus
Geo Origin : AMERICA, South America, Amazon River basin, in the Maués and Arapiuns rivers, Brazil.
Diet : Omnivores
Gender Differences : Dimorphic
Breeding : Substrate Spawner
Temperament : Aggressive
Con specific Temperament : aggressive
Standard Length : 5.5"
Total Length : 6.8"
Water Hardness: Soft, dh range 3-9
Difficulty ; 3


It is a medium sized fish of about 5.5 " found in Brazil, South America.


It was first described by Kullander, 1997 , and has been placed in Genus Aequidens and subfamily Cichlasomatinae.

The Genus "Aequidens" is derived from Latin words, equips+equal+dens(teeth), which roughly translates to "Fish with equal teeth".

The species name refers to location Maués, and refers to the type locality, located in the drainage of the rio Maués.

Distribution & Habitat:

It is found in South america,Brazil, Amazon River basin, in the Maués and Arapiuns rivers.

A.mauesanus is known only from the lower rio Maués, a tributary to the paraná Urariá, a channel of the rio Amazonas; and from the rio Arapiuns, a tributary of the lower rio Tapajós. The type locality is a small stream of the left bank of the rio Maraú at its mouth into the rio Maués.

It is benthopelagic or swims above river bed at depths of about 1-3 m in black water rivers.


It is a omnivore in nature, and eats small insects, fish, algae etc.




It is a medium sized fish having a Standard Length ( from tip of snout to begriming of tail fin) 5.5 " .

It is slender in appearance and can be easily distinguished uniquely by its color pattern.

  • While the fish is juvenile the lateral band is continuous, but as the fish reaches adulthood the band is replaced by blackish blotches in posterior part.
  • There is a small mid lateral spot and above it there is a prominent dark dorsal blotch which is separated from the mid lateral spot by wide light inter spaces.
    There is only one other Aequidens species with a dorsal blotch and that is A. tubicen, however this blotch is found more towards dorsal side of the fish, a much wider light blotch anterior to the caudal spot, a dark blotch in the preopercular corner instead of a cheek spot.
  • A.mauesanus has 25-26 E1 scales and 27-28 vertebra instead of more common 25-26 vertebra

It is known to live for 8-10 years.

Water Parameters:

It is found in black water rivers with a ph of 4-5 and dh range 3-9.










  Sandeep Raghuvanshi
Picture Credits   Wikipdeia and other sources which have releases under GNU, unless specifically credited
Citations/Further Reading  

Froese, R. and D. Pauly. Editors. 2011.FishBase. World Wide Web electronic publication., ( 10/2013 )

KULLANDER, S. O. 1995. Three new cichlid species from southern Amazônia: Aequidens gerciliae, A. epae and A. michaeli. Ichthyologist Exploration of Freshwaters 6:149-170.