Nematogenys inermis

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: Nematogenyidae
Genus: Nematogenys

References

* Froese, R. and D. Pauly. Editors. 2006. FishBase, version (02/2006). [1]

Nematogenys inermis is a kind of catfish, and the only extant species in the family Nematogenyiidae. This fish originates from fresh water in central Chile.[2]

The body is naked (without scales) and elongate. There are three pairs of barbels: chin (mental) barbels, maxillary barbels, and nasal barbels. There is no adipose fin. The opercle lacks spines.[2]

Nematogenyidae and Trichomycteridae are sister groups that together form a clade that is sister to the families Callichthyidae, Scoloplacidae, Astroblepidae, and Loricariidae.[3]

One extinct species, Nematogenys cuivi, has been described in this genus.

References

1. ^ World Conservation Monitoring Centre (1996). "Nematogenys inermis". IUCN Red List of Threatened Species. Version 2006. International Union for Conservation of Nature. http://www.iucnredlist.org/apps/redlist/details/14499.
2. ^ a b Nelson, Joseph, S. (2006). Fishes of the World. John Wiley & Sons, Inc.. ISBN 0471250317.
3. ^ Diogo, Rui; Chardon, Michel; Vandewalle, Pierre (January 2006). "On the osteology and myology of the cephalic region and pectoral girdle of Nematogenys inermis (Ghichenot, 1848), with comments on the autapomorphies and phylogenetic relationships of the Nematogenyidae (Teleostei : Siluriformes)" (PDF). Belg. J. Zool. 136 (1): 15–24. http://www.naturalsciences.be/institute/associations/rbzs_website/bjz/back/pdf/BJZ%20136(1)/Volume%20136(1),%20pp.%2015-24.pdf.