Ancistrus hoplogenys is a species of armored catfish native to Argentina, Brazil, Guyana, Paraguay, Peru, and Uruguay, where it occurs in the basins of the Amazon River, the Essequibo River, and the Paraguay River. It has also been reported from Suriname. This species grows to a length of 15.8 centimetres (6.2 in) SL. In the aquarium hobby, this fish is sometimes known as the spotted or starlight bristlenose pleco, although it may also be referred to by its L-number, which is L059.
Ancistrus centrolepis is a species of catfish in the family Loricariidae. It is a freshwater species native to South America, where it occurs in coastal drainages of the northern Andes, including the Atrato River, Baudó River, and San Juan River basins in Colombia. The species reaches 18.4 cm SL.
Ancistrus bolivianus is a species of catfish in the family Loricariidae. It is native to South America, where it occurs in the basins of the Beni River, the Mamoré River, and the Madre de Dios River. The species reaches 8.8 cm SL.
Ancistrus jelskii is a species of catfish in the family Loricariidae. It is native to the upper Tulumayo River basin, which is part of the Ucayali River system in Peru. The species reaches 8 cm in total length.
Ancistrus gymnorhynchus is a species of catfish in the family Loricariidae. It is a freshwater species native to South America, where it occurs in the upper Pao River basin in the Orinoco drainage, as well as in coastal rivers of the states of Carabobo and Yaracuy in Venezuela. The species reaches 14.2 cm SL and it is known to feed on algae, which it has been noted to be very efficient at removing.
Ancistrus latifrons is a species of catfish in the family Loricariidae. It is native to South America, where it occurs in the basins of the Amazon River and the Solimões River. The species reaches 15.4 cm SL.
Ancistrus lithurgicus is a species of catfish in the family Loricariidae. It is a freshwater species native to South America, where it occurs in the basin of the Essequibo River in Guyana. The species reaches 13.2 cm SL.
Ancistrus clementinae is a species of catfish in the family Loricariidae. It is native to South America, where it occurs in the Pozuelos River basin, which is part of the Guayas River drainage in Ecuador. The species reaches 10.2 cm SL.
Ancistrus tamboensis is a species of catfish in the family Loricariidae. It is native to South America, where it occurs in the Tambo River basin in the Ucayali River drainage of Peru. The species reaches 8.2 cm SL and is named for the river basin in which it occurs.
Ancistrus brevifilis is a species of catfish in the family Loricariidae. It is a freshwater fish native to South America, where it occurs in the Tuy River basin in Venezuela. The species reaches 11.8 cm SL.
Ancistrus cuiabae is a species of catfish in the family Loricariidae. It is native to South America, where it occurs in the Cuiabá River basin, which is part of the Paraguay River drainage in Brazil. The species reaches 11.5 cm SL.
Ancistrus damasceni is a species of catfish in the family Loricariidae. It is native to South America, where it occurs in the upper Parnaíba River basin in Brazil. The species reaches 6.5 cm SL.
Ancistrus dubius is a species of catfish in the family Loricariidae. It is native to South America, where it occurs in the basins of the Amazon River, the Paraná River, and the Paraguay River. The species reaches 12.6 cm SL.
Ancistrus lineolatus is a species of catfish in the family Loricariidae. It is native to South America, where it occurs in the Orteguaza River basin, which is part of the Japurá River drainage in Colombia. The species reaches 9 cm SL.
Ancistrus malacops is a species of catfish in the family Loricariidae. It is a freshwater fish native to South America, where it occurs in the Ampiyacu River basin in Peru. FishBase states that the species reaches 7.7 cm SL, although larger specimens, including one of 11.78 cm SL from the Gustavo Orcés V. Natural History Museum in Quito, Ecuador, are known.
Ancistrus maracasae is a species of catfish in the family Loricariidae. It is a freshwater fish native to the Caribbean, where it occurs in the basin of the Maracas River, which is a major tributary of the Caroni River in Trinidad and Tobago, indicating that it is endemic to the island of Trinidad. The species reaches 8.3 cm SL.
Ancistrus megalostomus is a species of catfish in the family Loricariidae. It is native to South America, where it occurs in the Beni River basin, which is part of the Madeira River drainage in Bolivia. The species reaches 8.3 cm SL and is noted to inhabit high-altitude environments.
Ancistrus piriformis is a species of catfish in the family Loricariidae. It is native to South America, where it occurs in the Acaray River basin, which is part of the Paraná River drainage in Paraguay, although it has also been reported from Argentina. The species reaches 8.3 cm SL.
Ancistrus taunayi is a species of catfish in the family Loricariidae. It is native to South America, where it occurs in the Uruguay River basin. The species reaches 11.9 cm SL and at least 52.3 g in weight.
Ancistrus vericaucanus is a species of catfish in the family Loricariidae. It is native to South America, where it occurs in the basin of the Cauca River, which is a tributary of the Magdalena River, in Colombia. It reaches 7.2 cm SL. Its congener Ancistrus caucanus was once thought to inhabit the Cauca River basin and was named after the river itself, but it was determined in 2013 that A. caucanus was not actually native to the Cauca. The specific epithet of A. vericaucanus means "true caucanus", in reference to the misleading name of A. caucanus.
