Parakysis

Taxobox
name = "Parakysis"
regnum = Animalia
phylum = Chordata
classis = Actinopterygii
ordo = Siluriformes
familia = Akysidae
subfamilia = Parakysinae
genus = "Parakysis"
genus_authority = Herre, 1940
type_species = "Parakysis verrucosa"
type_species_authority = Herre, 1940
subdivision_ranks = Binomial name
subdivision =
"Parakysis anomalopteryx"
Roberts, 1989
"Parakysis grandis"
Ng & Lim, 1995
"Parakysis longirostris"
Ng & Lim, 1995
"Parakysis notialis"
Ng & Kottelat, 2003
"Parakysis verrucosus"
Herre, 1940

"Parakysis" is a genus of catfishes (order Siluriformes) of the family Akysidae. It includes five species, "P. anomalopteryx", "P. grandis", "P. longirostris", "P. notialis", and "P. verrucosus".cite journal|title="Parakysis notialis", a new species of akysid catfish from Borneo (Siluriformes: Akysidae)|first=Heok Hee|last=Ng|coauthors=Kottelat, Maurice|journal=Ichthyol Res|year=2003|volume=50|pages=48–51|doi=10.1007/s102280300006] 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]

Distribution

"Parakysis" species are found in small forest streams of Sundaic Southeast Asia. "P. anomalopteryx" originates from the Kapuas River basin in western Borneo. "P. grandis" inhabits the Kapuas and Kuching River basins in Borneo and Deli, Indragiri, and Batang Hari basins in Sumatra. "P. longirostris" is distributed in Singapore, peninsular Malaysia, and the Riau Archipelago. "P. verrucosus" is known from Peninsular Malaysia and the Riau Archipelago. The discovery of "P. notialis" in 2003 expanded the known range of "Parakysis" species to the Barito River basin in southern Borneo.

Description

They are cryptically colored fishes that have a highly rugose skin with tubercles all over the body, branched mandibular barbels, a long, low adipose ridge, and a forked caudal fin. "Parakysis" species characteristically have pigmented tubercles and lateral lobes of the lower lip. They are also distinguished from "Akysis" by well-developed barbels, absence of teeth on the palatine, non-serrated pectoral and dorsal spines, and the apparent absent of the lateral line.cite journal|url=http://www.zoosprint.org/viewPDFFile.asp?fname=2675-2678.pdf&typ=jnl&Imonth=5&Iyear=2007|title=Fishes of the Genus "Akysis" Bleeker from India (Teleostei: Akysidae)|first=W.|last=Vishwanath|coauthors=Linthoingambi, I.; Juliana, L.|journal=Zoos' Print Journal|volume=22|issue=5|pages=2675–2678|format=PDF] They range in size from 2.0–6.2 centimetres (.8–2.4 in) SL.FishBase species|genus=Parakysis|species=anomalopteryx|year=2007|month=July] FishBase species|genus=Parakysis|species=grandis|year=2007|month=July] FishBase species|genus=Parakysis|species=longirostrkis|year=2007|month=July] FishBase species|genus=Parakysis|species=notialis|year=2007|month=July] FishBase species|genus=Parakysis|species=verrucosus|year=2007|month=July]

Ecology

"P. anomalopteryx" is found in small forest streams. "P. longirostris" is nocturnal and occurs in clumps of vegetation in streams with flowing waters. It is sympatric with "P. verrucosus." "P. verrucosus" is found in primary peat streams with dense litter falls.

References