Theraps
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Cichliformes
Family: Cichlidae
Genus: Theraps
Günther, 1862
Species:
T. irregularis
Binomial name
Theraps irregularis
Günther, 1862

Theraps is a genus of cichlid fish that includes only a single species, the Arroya ciclid (Theraps irregularis) from fast-flowing rivers and streams in the Usumacinta and Polochic basins of southern Mexico and Guatemala.[1][2] It is a medium-sized cichlid, up to 19 cm (7.5 in) in standard length.[3]

Taxonomy

Historically, Theraps was included in Cichlasoma. Once recognized as its own genus, it sometimes included a wide range of species now known to belong in other genera, including Cincelichthys, Chortiheros, Chuco, Cryptoheros, Kihnichthys, Oscura, Paraneetroplus, Rheoheros, Talamancaheros, Tomocichla and Wajpamheros. In a major review of 2015, only five species remained in this genus,[4] but in 2016 it was shown that four of these were not close relatives of the Theraps type species, T. irregularis, resulting in them being moved to Chuco and Wajpamheros.[2] As a consequence, Catalog of Fishes now recognizes Theraps as only including the type species,[5] and as of 2023 FishBase agrees.[3]

References

  1. 1 2 Espinosa Pérez, H.; Daniels, A.; Maiz-Tome, L. (2019). "Theraps irregularis". IUCN Red List of Threatened Species. 2019: e.T192907A2179799. doi:10.2305/IUCN.UK.2019-2.RLTS.T192907A2179799.en. Retrieved 21 August 2023.
  2. 1 2 Říčan, O.; Piálek, L.; Dragová, K. & Novák, J. (2016). "Diversity and evolution of the Middle American cichlid fishes (Teleostei: Cichlidae) with revised classification". Vertebrate Zoology. 66 (1): 1–102.
  3. 1 2 Froese, Rainer and Pauly, Daniel, eds. (2023). Species of Theraps in FishBase. August 2023 version.
  4. ↑ McMahan, C.D.; Matamoros, W.A.; Piller, K.R.; Chakrabarty, P. (2015). "Taxonomy and systematics of the herichthyins (Cichlidae: Tribe Heroini), with the description of eight new Middle American Genera" (PDF). Zootaxa. 3999 (2): 211–234. doi:10.11646/zootaxa.3999.2.3. PMID 26623572.
  5. ↑ Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Species in the genus Theraps". Catalog of Fishes. California Academy of Sciences. Retrieved 20 August 2023.
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