Harttia

Cladus: Eukaryota
Supergroup: Opisthokonta
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Superclassis: Osteichthyes
Classis: Actinopterygii
Subclassis: Neopterygii
Infraclassis: Teleostei
Superordo: Ostariophysi
Ordo: Siluriformes
Familia: Loricariidae
Subfamilia: Loricariinae
Tribus: Harttiini
Genus: Harttia

Harttia is a genus of catfishes (order Siluriformes) of the family Loricariidae.

Taxonomy

As of 1997, Harttia was considered a monophyletic taxon.[1] However, Harttia is in need of revision. For example, the synonymy of Cteniloricaria with Harttia is questionable because it rests solely on the characteristics of Harttia fowleri without considering the type species of Cteniloricaria.[2]

Distribution and habitat

Distribution of Harttia species primarily includes rivers draining the Guyana Shield, coastal rivers in northeastern Brazil, and the Amazon River basin.[2] The greatest species diversity of Harttia, occurs in the Pre-Cambrian Brazilian Shield region.[1] Only H. platystoma and H. merevari are known from Venezuela.[3] These rheophilic fishes are found in the upper courses of rivers over rocky and sandy bottoms.[2] Harttia species are thought to be able to exploit areas with the strongest current, because of its extremely depressed body and long caudal peduncle, comparing to other species.[2]

Description

Sexual dimorphism includes hypertrophied odontodes on the pectoral fin spines and along the margins of the snout in mature males.[2]

Harttia exhibits considerable karyotypic diversity with chromosome numbers between 2n = 52 and 2n = 58 in the four species characterized.[2]

Ecology

Representatives of this genus seem to be open brooders.[2]

External links

* Covain, Raphaël; Le Bail, Pierre-Yves, Fisch-Muller, Sonia (2006). "Les espèces du genre Harttia (Siluriformes: Loricariidae) en Guyane française: morphologie, taxinomie et distribution (French)" (PDF). Cybium 30 (1): 3–18. http://phy043.tours.inra.fr:8080/archive/00000231/01/ID566.pdf.

References

1. ^ a b Langeani, Francisco; Oyakawa, Osvaldo T.; Montoya-Burgos, Juan I. (2001). "New Species of Harttia (Loricariidae, Loricariinae) from the Rio São Francisco Basin" (PDF). Copeia 2001 (1): 136–142. doi:10.1643/0045-8511(2001)001[0136:NSOHLL]2.0.CO;2.
2. ^ a b c d e f g Covain, Raphael; Fisch-Muller, Sonia (2007). "The genera of the Neotropical armored catfish subfamily Loricariinae (Siluriformes: Loricariidae): a practical key and synopsis" (PDF). Zootaxa 1462: 1–40. http://www.mapress.com/zootaxa/2007f/zt01462p040.pdf.
3. ^ Provenzano R., Francisco; Machado-Allison, Antonio; Chernoff, Barry; Willink, Phil; Petry, Paulo (2005). "Harttia merevari, a new species of catfish (Siluriformes: Loricariidae) from Venezuela" (PDF). Neotropical Ichthyology 3 (4): 519–524. doi:10.1590/S1679-62252005000400009. http://www.ufrgs.br/ni/vol3num4%5CNI_v3n4p519-524lowr.pdf.