Hoplomyzon

Taxobox
name = "Hoplomyzon"
regnum = Animalia
phylum = Chordata
classis = Actinopterygii
ordo = Siluriformes
familia = Aspredinidae
subfamilia = Hoplomyzontinae
genus = "Hoplomyzon"
genus_authority = Myers, 1942
type_species = "Hoplomyzon atrizona"
type_species_authority = Myers, 1942
subdivision_ranks = Binomial name
subdivision =
"Hoplomyzon atrizona"
Myers, 1942
"Hoplomyzon papillatus"
Stewart, 1985
"Hoplomyzon sexpapilostoma"
Taphorn & Marrero, 1990

"Hoplomyzon" is a genus of catfishes (order Siluriformes) of the family Aspredinidae. It includes three species, "H. atrizona", "H. papillatus", and "H. sexpapilostoma".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] There are also at least two undescribed species, including a blind and unpigmented species.

"Hoplomyzon" is distributed in the Lake Maracaibo, Orinoco, and Amazon basins.cite paper|url=http://www.cumv.cornell.edu/pdf/Friel_Ph.D._Thesis_1994.pdf|title=A Phylogenetic Study of the Neotropical Banjo Catfishes (Teleostei: Siluriformes: Aspredinidae)|author=Friel, John Patrick|publisher=Duke University, Durham, NC|date=1994-12-13|accessdate=2007-08-07|format=PDF] "H. atrizona" inhabits the Lake Maracaibo basin. "H. papillatus" occurs in the Napo and Portuguesa River basins of Ecuador and Venezuela, respectively. "H. sexpapilostoma" is known from the Orinoco River basin of Venezuela.

"Hoplomyzon" species are small, armoured aspredinids, growing up to 32 millimetres (1.3 in) SL in "H. sexpapilostoma".FishBase species|genus=Hoplomyzon|species=sexpapilostoma|year=2007|month=Aug] "H. papillatus" grows to 17 mm (.67 in) SL.FishBase species|genus=Hoplomyzon|species=papillatus|year=2007|month=Aug] "H. atrizona" grows to 27 mm SL.FishBase species|genus=Hoplomyzon|species=atrizona|year=2007|month=Aug] Members of this genus are distinguished from all other aspredinids by having each premaxilla with two bony knobs superficially covered by fleshy papillae, the dorsal and ventral armor plates not overlapping, and 2–3 sets of paired pre-anal-fin plates. They also have the maxillary barbels adnate with the head and the pectoral spine less than one-quarter of the fish's standard length.

External links

*cite web|url=http://tolweb.org/Hoplomyzon/15270|last=Friel|first=John P.|title=Hoplomyzon Myers 1942.|date=14 April 2000|publisher=Tree of Life Web Project|accessdate=2007-08-07

References