''Glanapteryx'' is a

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

catfish Catfish (or catfishes; order Siluriformes or Nematognathi) are a diverse group of ray-finned fish. Named for their prominent barbels, which resemble a cat's whiskers, catfish range in size and behavior from the three largest species alive, ...

es native to

South America South America is a continent entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a relatively small portion in the Northern Hemisphere at the northern tip of the continent. It can also be described as the southe ...

Taxonomy

''Glanapteryx'' is a

monophyletic In cladistics for a group of organisms, monophyly is the condition of being a clade—that is, a group of taxa composed only of a common ancestor (or more precisely an ancestral population) and all of its lineal descendants. Monophyletic gro ...

genus. ''Glanapteryx'' has been proposed as the

sister group In phylogenetics, a sister group or sister taxon, also called an adelphotaxon, comprises the closest relative(s) of another given unit in an evolutionary tree. Definition The expression is most easily illustrated by a cladogram: Taxon A and t ...

to a

clade A clade (), also known as a monophyletic group or natural group, is a group of organisms that are monophyletic – that is, composed of a common ancestor and all its lineal descendants – on a phylogenetic tree. Rather than the English term, ...

composed of '' Pygidianops'' and ''

Typhlobelus ''Typhlobelus'' is a genus of pencil catfishes native to South America. Species There are currently five recognized species in this genus: * '' Typhlobelus auriculatus'' de Pinna & Zuanon, 2013de Pinna, M.C.C. & Zuanon, J. (2013): The Genus ' ...

'', with ''

Listrura ''Listrura'' is a genus of pencil catfishes native to South America. Taxonomy ''Listrura'' was first described in 1988 for two species from southeastern Brazil, the first record of the subfamily Glanapteryginae outside of the Amazon River basin. ...

'' the sister group to those three.

Species

There are currently two recognized species in this genus: * ''

Glanapteryx anguilla ''Glanapteryx'' is a genus of catfishes native to South America. Taxonomy ''Glanapteryx'' is a monophyletic genus. ''Glanapteryx'' has been proposed as the sister group to a clade composed of '' Pygidianops'' and ''Typhlobelus'', with ''Listru ...

Myers Myers as a surname has several possible origins, e.g. Old French ("physician"), Old English ("mayor"), and Old Norse ("marsh"). People *Abram F. Myers (born 1889), chair of the Federal Trade Commission and later general counsel and board chai ...

, 1927 * '' Glanapteryx niobium'' de Pinna, 1998

Distribution and habitat

''G. anguilla'' originates from the

Negro In the English language, ''negro'' is a term historically used to denote persons considered to be of Black African heritage. The word ''negro'' means the color black in both Spanish and in Portuguese, where English took it from. The term can be ...

and

Orinoco The Orinoco () is one of the longest rivers in South America at . Its drainage basin, sometimes known as the Orinoquia, covers , with 76.3 percent of it in Venezuela and the remainder in Colombia. It is the fourth largest river in the wor ...

River basins of

Brazil Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South America and Latin America. At and with over 217 million people, Brazil is the world's fifth-largest country by area ...

and

Venezuela Venezuela (; ), officially the Bolivarian Republic of Venezuela ( es, link=no, República Bolivariana de Venezuela), is a country on the northern coast of South America, consisting of a continental landmass and many islands and islets in th ...

, growing to a length of about 6.1 centimetres (2.4 in) TL. ''G. niobium'' reaches about 5.5 cm (2.2 in). These species lack an

anal fin Fins are distinctive anatomical features composed of bony spines or rays protruding from the body of a fish. They are covered with skin and joined together either in a webbed fashion, as seen in most bony fish, or similar to a flipper, as se ...

. ''Glanapteryx anguilla'' has been found in small forest streams with sandy substrate covered by leaf litter.

References

Trichomycteridae Fish of South America Fish of Brazil Fish of Venezuela Freshwater fish genera Catfish genera Taxa named by George S. Myers {{Trichomycteridae-stub