Biology:Mesonauta acora

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Short description: Species of fish

Mesonauta acora
Stressed pattern.
Painting by Castelnau from the South America Expedition, published 1856
Scientific classification edit
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Cichliformes
Family: Cichlidae
Genus: Mesonauta
Species:
M. acora
Binomial name
Mesonauta acora
(Castelnau, 1855)
Synonyms

Chromys acora Castelnau, 1855

Mesonauta acora is a species of cichlid fish endemic to the Amazon Basin of Brazil; specifically, to blackwater in the Xingu and Tocantins River basins in South America. The species was named by François Louis de la Porte, comte de Castelnau in 1855.[1][2][3]

All Mesonauta Acoras are omnivores. Their diet is composed of insects, aquatic invertebrates and algae.[4]

Morphology / Taxonomic Detail

Mesonauta acora is a laterally compressed cichlid that typically reaches between 6 and 10 cm in length. It can be identified by a distinct oblique dark band running from the snout through the eye to the dorsal-fin region, along with 12–13 dorsal spines and 10–11 anal spines that differentiate it from related species. DNA-barcoding analysis of the cytochrome c oxidase I (COI) gene confirms M. acora as a genetically distinct lineage within the genus, clarifying its taxonomic boundaries.[5]

See also

  • List of freshwater aquarium fish species

References

  1. Froese, Rainer and Pauly, Daniel, eds. (2013). "Mesonauta acora" in FishBase. February 2013 version.
  2. Loiselle, Paul V. (1995). The Cichlid Aquarium. Germany: Tetra Press. ISBN 1-56465-146-0. 
  3. Kullander, S.O. (1998). "A phylogeny and classification of the South American Cichlidae (Teleostei: Perciformes)". in L.R. Malabarba. Phylogeny and classification of neotropical fishes. Porto Alegre: EDIPUCRS. pp. 461–498. ISBN 978-85-7430-035-1. 
  4. Pantoja, Farias (2015). "Parasites component community in wild population of Pterophyllum scalare Schultze, 1823 and Mesonauta acora Castelnau, 1855, cichlids from the Brazilian Amazon". Journal of Applied Ichthyology 31 (6): 1043–1048. doi:10.1111/jai.12903. Bibcode2015JApIc..31.1043F. https://www.researchgate.net/publication/282790974. 
  5. de Oliveira, Rianne Caroline; Britzke, Ricardo; de Oliveira, Claudio; da Graça, Weferson Júnio (2025-06-01). "Species delimitation in Neotropical fishes of Mesonauta Günther 1862 (Cichliformes: Cichlidae)" (in en). Organisms Diversity & Evolution 25 (2): 343–355. doi:10.1007/s13127-025-00675-0. ISSN 1618-1077. https://doi.org/10.1007/s13127-025-00675-0. 

Wikidata ☰ Q509687 entry