Glyptosternon

Taxobox
name = "Glyptosternon"
regnum = Animalia
phylum = Chordata
classis = Actinopterygii
ordo = Siluriformes
familia = Sisoridae
subfamilia = Glyptosterninae
tribus = Glyptosternina
genus = "Glyptosternon"
genus_authority = M’Clelland, 1842
type_species = "Glyptosternon reticulatus"
type_species_authority = M’Clelland, 1842
subdivision_ranks = Binomial name
subdivision =
"Glyptosternon akhtari"
Silas, 1952
"Glyptosternon maculatum"
(Regan, 1905)
"Glyptosternon malaisei"
Rendahl & Vestergren, 1941
"Glyptosternon reticulatum"
M’Clelland, 1842


synonyms =
*"Glyptosternum" Agassiz, 1846
*"Parexostoma" Regan, 1905

"Glyptosternon" is a genus of catfishes (order Siluriformes) of the family Sisoridae. It includes four species, "G. akharti", "G. maculatum", "G. malaisei", and "G. reticulatum".cite journal|url=http://www.mapress.com/zootaxa/2006f/zt01345p096.pdf|title=Genera of the Asian Catfish Families Sisoridae and Erethistidae (Teleostei: Siluriformes)|first=Alfred W.|last=Thomson|coauthors=Page, Lawrence M.|journal=Zootaxa|volume=1345|pages=1–96|year=2006|format=PDF] 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

"Glyptosternon" species are distributed in Indus drainage in Afghanistan, Pakistan, India, Uzbekistan, Tajikistan, and China, east to the Irrawaddy drainage in Burma. "G. akharti" is from the Bamian River of the Oxus Watershed of the Indus drainage in Afghanistan. "G. maculatum" is found in the Brahmaputra drainage of India and China. "G. malaisei", known only from the type, is from the Irrawaddy drainage in Burma. "G. reticulatum" is from the Indus drainage including Afghanistan, Pakistan, India, Uzbekistan, Tajikistan and China.

Description

"Exostoma" is distinguished by having a the combination of an interrupted groove behind the lip (post-labial groove), the gill openings extending onto the underside (venter), homodont dentition with pointed teeth in both jaws, a crescent-shaped tooth patch in the upper jaw, and 10–12 branched pectoral rays. The head is depressed with a broadly rounded snout. The body is elongate and flattened ventrally to the pelvic fins. The eyes are minute, dorsally located, and under the skin (subcutaenous). The lips are thick, fleshy, and papillated. The teeth in both jaws are pointed and the tooth patches in the upper jaw are joined, forming a band produced posteriorly at sides (crescent-shaped). The paired fins are plaited to form an adhesive apparatus.

"G. maculatum" and "G. reticulatum" grow to between 24.0–25.5 centimetres (9.45–10.0 in).FishBase species|genus=Glyptosternon|species=maculatum|year=2007|month=July] FishBase species|genus=Glyptosternon|species=reticulatum|year=2007|month=July] "G. malaisei" has a maximum recorded length of 7.0 cm TL.FishBase species|genus=Glyptosternon|species=malaisei|year=2007|month=July]

Ecology

"G. maculatum" is found in mountain rapids. "G. reticulatum" is found in rivers and streams under stones and rocks. It feeds mainly on invertebrates, especially insect larvae.

References