Baryancistrus is a genus of freshwater Loricariid catfish. They inhabit flowing sections of rivers, especially clearwater, in the basins of the Amazon and Orinoco in Brazil and Venezuela. The largest species reach up to 34 cm (13 in) in total length.
Pseudancistrus is a genus of suckermouth armored catfishes native to South America.
Pseudancistrus sidereus is a species of armored catfish known only from the upper Orinoco basin in Amazonas state, Venezuela.
Hypancistrus is a genus of loricariid catfish originating from the Amazon basin in South America. Unlike many of the other Loricariids, however, some Hypancistrus species are more carnivorous and enjoy meat in their diet. Hypancistrus species are popular aquarium fish, including such popular fish as the zebra pleco and Queen Arabesque pleco.
Hemiancistrus is a genus of suckermouth armored catfishes. These species are native to South America. The taxonomy of this genus is complex and unclear, and major work has to be done. Many of these fish are popular aquarium fish.
Corymbophanes is a genus of armored catfish native to South America where they are only known from Guyana. Corymbophanes was originally placed in its own tribe Corymbophanini, but the first comprehensive molecular phylogenetic analysis of the subfamily Hypostominae found Corymbophanes to be nested within the tribe Ancistrini.
Pseudolithoxus is a genus of suckermouth armored catfishes with five described species from the basins of the Orinoco, Casiquiare and upper Rio Negro in Venezuela. Additionally, a possibly undescribed species is known from the Trombetas and Nhamundá rivers in Brazil.
Peckoltia sabaji is a species of catfish in the family Loricariidae. It is native to South America, where it occurs in the basins of the Rupununi, the Essequibo River, and the Takutu River in Guyana, as well as the basins of the Casiquiare canal, the Rio Negro, the Cinaruco River, and the Orinoco in Venezuela. It is usually found among boulders in medium to large rivers. The species reaches 19.8 cm SL and is of disputed classification.
Hemiancistrus subviridis, the green phantom pleco, is a species of armored catfish from the family Loricariidae, commonly found in Venezuela. Within Venezuela, it is native to the Orinoco and Casiquiare drainage basins, where it is usually found among granitic rocks in flowing water. The species reaches 15 cm SL.
Ancistrus saudades is a species of catfish in the family Loricariidae. It is native to South America, where it occurs in the basins of the Takutu River, the Ventuari River, the Caroní River, and the Caura River in Guyana, Venezuela, and Brazil. The species reaches at least 10.75 cm SL and was described in 2019 by Lesley S. de Souza of the Field Museum of Natural History, Donald C. Taphorn of the Royal Ontario Museum, and Jonathan Armbruster of Auburn University alongside five other species of Ancistrus. FishBase does not list this species.
Hemiancistrus guahiborum is a species of catfish in the family Loricariidae. It is native to South America, where it occurs in the Orinoco drainage in Venezuela. The species reaches at least 12.55 cm SL and was described in 2005 by David C. Werneke and Jonathan W. Armbruster of Auburn University, Nathan K. Lujan of the American Museum of Natural History, and Donald C. Taphorn of the Royal Ontario Museum on the basis of its distinctive coloration and morphology. It appears in the aquarium trade, where it is usually known either as the orange-seam pleco or by its L-number, which is L-106.
Peckoltia lineola is a species of catfish in the family Loricariidae. It is native to South America, where it occurs in the basins of the Ventuari River in Venezuela and the Inírida River in Colombia. The species reaches 9.7 cm SL and is typically found in rocky riffles. Its specific epithet, lineola, derives from a Latin word meaning "line", referring to the lines present on the species' compound pterotic.
Peckoltia wernekei is a species of catfish in the family Loricariidae. It is native to South America, where it occurs in the Ventuari River, which is a tributary of the Orinoco in the state of Amazonas in Venezuela. The species reaches at least 10.46 cm SL.
Pseudancistrus kwinti is a species of catfish in the family Loricariidae. It is native to South America, where it occurs in the Coppename River in Suriname. The species reaches 9.4 cm (3.7 in) SL. P. kwinti was described in 2010 by Phil Willink of the Field Museum of Natural History, Jan Mol of Anton de Kom University of Suriname, and Barry Chernoff of Wesleyan University on the basis of distinctive morphology and coloration.
Pseudancistrus pectegenitor is a species of catfish in the family Loricariidae. It is native to South America, where it occurs in the main channel of the Orinoco near the mouth of the Ventuari River, as well as in the Casiquiare. The species is usually found in areas with flowing water near large rocky outcrops. It reaches 24.2 cm SL.
'Pseudancistrus' megacephalus is a species of catfish in the family Loricariidae. It is of uncertain and disputed classification.
Pseudancistrus reus is a species of catfish in the family Loricariidae. It is native to South America, where it occurs in the Caroní River in Venezuela. It is typically found in presumably blackwater environments with low conductivity and a moderate current. The species reaches 7.7 cm SL. Its specific epithet, reus, is derived from Latin and translates to "prisoner", alluding to the species' barred patterning which resembles a stereotypical prison uniform.
Pseudolithoxus kelsorum is a species of catfish in the family Loricariidae. It is native to South America, where it is known only from a single site in the Orinoco drainage, located above the Maipures Rapids and south of the Atures Rapids in the Venezuelan state of Amazonas. The species reaches 6.6 cm SL.
Hypostomus rhantos is a species of catfish in the family Loricariidae. It is native to South America, where it occurs in the Ventuari River as well as the upper Orinoco, ranging from above Puerto Ayacucho to the Casiquiare in Venezuela. The species reaches 19.6 cm SL. Its specific epithet, rhantos, derives from a Greek word meaning "speckled" and refers to the species' pattern of small spots.
Hypostomus salgadae is a disputed species of catfish in the family Loricariidae that may be synonymous with the species Hypostomus carvalhoi. It is native to South America, where it occurs in the Jaguaribe River basin in Brazil. FishBase reports the maximum length of the species as 2 cm in standard length, but it is likely that the species can exceed this size. It is believed to be a facultative or obligate air-breather.
