Hassar (genus)

Taxobox
name = "Hassar"
regnum = Animalia
phylum = Chordata
classis = Actinopterygii
ordo = Siluriformes
familia = Doradidae
subfamilia = Doradinae
genus = "Hassar"
genus_authority = Eigenmann & Eigenmann, 1888
binomial = "Hassar affinis"
binomial_authority = (Steindachner, 1881)
binomial2 = "Hassar orestis"
binomial2_authority = (Steindachner, 1875)
binomial3 = "Hassar wilderi"
binomial3_authority = Kindle, 1895

"Hassar or [Cascadura or Cascaduroo] [http://www.nalis.gov.tt/Agri/Agri_Cascadura.htm] " is a genus of catfishes (order Siluriformes) of the family Doradidae. It includes three species, "H. affinis", "H. orestis", and "H. wilderi".cite journal|url=http://silurus.acnatsci.org/ACSI/library/biblios/2007_Ferraris_Catfish_Checklist.pdf|title=Checklist of catfishes, recent and fossil (Osteichthyes: Siluriformes), and catalogue of siluriform primary types|first=Carl J., Jr.|last=Ferraris|journal=Zootaxa|volume=1418|pages=1–628|year=2007|format=PDF]

Taxonomy

"Hassar" was described by Carl H. Eigenmann and Rosa Smith Eigenmann in 1888 with "Oxydoras orestis" as the type species. "Hassar" is a more derived genus within the family and is classified in the subfamily Doradinae.cite journal|title=The karyotypes of the thorny catfishes "Wertheimeria maculata" Steindachner, 1877 and "Hassar wilderi" Kindle, 1895 (Siluriformes: Doradidae) and their relevance in doradids chromosomal evolution|first=Eduardo S.|last=Eler|coauthors=Dergam, Jorge A.; Vênere, Paulo C.; Paiva, Lílian C.; Miranda, Gabriela A.; Oliveira, Alessandro A.|journal=Genetica|year=2007|volume=130|pages=99–103|format=PDF|doi=10.1007/s10709-006-0023-4]

Distribution

"Hassar" species are distributed in South America. "H. affinis" originates from the Parnaíba River basin.FishBase species|genus=Hassar|species=affinis|year=2007|month=June] "H. orestis" is found in the Amazon, Orinoco and Essequibo River basins.FishBase species|genus=Hassar|species=orestis|year=2007|month=June] "H. wilderi" inhabits the Tocantins River basin.FishBase species|genus=Hassar|species=wilderi|year=2007|month=June]

Description

Like other doradids, "Hassar" species have a row of scutes on each side of their body, though they are more subdued. "Hassar" species grow to approximately 20–25 centimetres (8–10 in) SL.

In the aquarium

"Hassar" species are very rarely imported for the aquarium hobby, and the most commonly imported species is "H. orestis". Care of this species is not straightforward; they are hard to acclimate if not in good condition at the point of sale. They are always wild caught. However, once settled in they are easier to care for. These fish should be provided with dense vegetation to feel comfortable. They are not aggressive, though smaller fish are very shy in the presence of larger fish.cite web|url=http://www.planetcatfish.com/cotm/cotm.php?article_id=92|title=PlanetCatfish::Catfish of the Month::November 2000|publisher=PlanetCatfish.com|date=2006-10-07|accessdate=2007-06-20]

References