Description:
The banjo catfish genus Xyliphius was established
by Eigenmann (1912) to include a single species, X.
magdalenae Eigenmann, from Río Magdalena
basin, Girardot, Colombia. That description was based
on a single specimen, 32.0 mm SL. Later, four species
were described in a short time frame: X.
lepturus and X.
melanopterus from western headwaters of Río
Bobonaza, upper Amazon basin (Orcés, 1962),
X.
barbatus (Alonso
de Arámburu & Arámburu, 1962), and
X. lombarderoi (Risso & Risso, 1964),
from Río Paraná, in Argentina. A sixth
species, X. kryptos, was described by Taphorn
& Lilyestrom (1983), from Río Aricuaisá,
lago de Maracaibo basin, Venezuela. Further collections,
though small, expanded the distribution of species
of Xyliphius beyond their type localities
(Cala, 1977). Currently, the six nominal species of
Xyliphius are known from northern South America
in the Río Magdalena system (X. magdalenae),
lago de Maracaibo (X. kryptos), and western
headwaters of the Amazonas basin and Río Orinoco
(X. lepturus and X. melanopterus),
and from southern South America in the Río
de La Plata system (X. barbatus and X.
lombarderoi) (Taphorn & Lilyestrom, 1983;
Galvis et al., 1997; Calviño & Castello,
2008). Another new species, Xyliphius anachoretes
(Figueiredo Carlos A, Britto Marcelo R. 2010) making
7 species in total is from the Tocantins-Araguaia
River system. In 2017 another species Xyliphius
sofiae was described
from the vicinity of Iquitos, Maynas, Loreto, Peru
to take the overal total to 8. Habitat:
Xyliphius live buried in the sand and perhaps
gravel of swift flowing streams. Etymology:
The genus name Xyliphius:
derived from the Greek word, xylephion = a little
piece of wood (referring to the woodlike appearance
of the type species of the genus). The specific name
melanopterus: melanos, black; pterus, fin,
referring to its predominantly black fins.
Common
Name:
Skunk Banjo Catfish
Synonyms:
None
Family:
Aspredinidae
Distribution:
South America:
Upper Amazon and Orinoco River basins. Type
locality: el bajo Pucayacu no lejos de su
desembocadura en el Bobonaza [Ecuador].
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