Theraps

Theraps is a genus from the cichlid fish found in Atlantic slope rivers of southern Mexico and northern Central America. They are relatively elongate, medium-sized cichlids.[1][2]

Theraps
Theraps micropthalmus bottom
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Cichliformes
Family: Cichlidae
Tribe: Heroini
Genus: Theraps
Günther, 1862
Type species
Theraps irregularis
Günther, 1862

Species and 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,[1] but in 2016 it was shown that four of these were not close relatives of the Theraps type species, T. intermedius, 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 T. intermedius,[3] but FishBase include both it and the three Chuco species in Theraps, resulting in a genus that is not monophyletic.[2] The four species placed in this genus by FishBase are:[4]

  • Theraps godmanni (Günther, 1862) (Southern checkmark cichlid)
  • Theraps intermedius (Günther, 1862) (Northern checkmark cichlid)
  • Theraps irregularis Günther, 1862 (Arroyo cichlid)
  • Theraps microphthalmus (Günther, 1862)

References
  1. 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.CS1 maint: uses authors parameter (link)
  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. Eschmeyer, W. N.; R. Fricke & R. van der Laan (eds.). "Theraps species". Catalog of Fishes. California Academy of Sciences. Retrieved 20 July 2020.
  4. Froese, Rainer and Pauly, Daniel, eds. (2020). Species of Theraps in FishBase. July 2020 version.


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