Philibert Commerson, sometimes spelled Commerçon by contemporaries, was a French naturalist, best known for accompanying Louis Antoine de Bougainville on his voyage of circumnavigation in 1766–1769.
Harttia is a genus of armored catfishes native to South America.
Apistoloricaria condei is a species of armored catfish endemic to Ecuador where it is found in the Napo River basin. This species can be found in turbid and dark waters, in moderately fast flowing streams, between 2–10 metres (6.6–32.8 ft) deep; no submerged vegetation is found here, and the bottom is made of sand, mud, dead leaves, twigs, branches, and trunks. This species grows to a length of 14.1 centimetres (5.6 in) SL.
Harttia carvalhoi is a species of armored catfish endemic to Brazil where it is found in the Paraíba do Sul drainage basin. This species grows to a length of 7.1 centimetres (2.8 in) SL.
Metaloricaria nijsseni is a species of armored catfish endemic to Suriname where it occurs in the Suriname, Saramacca, Nickerie and Corantijn River basins. This species grows to a length of 29.5 centimetres (11.6 in) SL.
Nannoplecostomus eleonorae is a species of armored catfish known only from the upper Rio Tocantins basin in the Brazilian state of Goiás. This species grows to a length of 2.22 centimetres (0.87 in) SL. This species is the only known member of its genus and the smallest loricariid catfish known.
Microplecostomus forestii, is a species of fish in the family Loricariidae found in two tributaries of the Tocantizinho River in the Tocantins basin. It is typically found in shallow, clear waters at depths of around 50 cm, in flat rocky environments. It is known to occur alongside the species Rhinolekos capetinga, as well as members of the genera Ancistrus, Creagrutus, Hypostomus, Ituglanis, and Phenacorhamdia. This species is the only member of its genus. It reaches 3.8 cm in standard length.
Alfredo Borelli was a French-born Italian zoologist, who worked mainly in Turin but who, early in his natural history career, conducted field work in South America.
Antenor Leitão de Carvalho is a Brazilian herpetologist and ichthyologist, born on 15 April 1910 and died on 11 December 1985 in Rio de Janeiro.
Harttia absaberi is a species of armored catfish where it is found in the upper rio Paraná drainage in Brazil.
Parotocinclus haroldoi is a species of catfish in the family Loricariidae. It is native to South America, where it is known from the state of Piauí in Brazil, with a 2020 redescription defining its range as the Parnaíba River basin. The species reaches 3.5 cm SL.
Aphanotorulus gomesi is a species of catfish in the family Loricariidae. It is native to South America, where it occurs in the Jaguaribe River basin. The species reaches 14.3 cm SL. It is thought to be a facultative air-breather.
Hypostomus borellii is a species of catfish in the family Loricariidae. It is native to the upper and middle Pilcomayo River basin in Argentina, Uruguay, and Bolivia. The species reaches 16.1 cm (6.3 in) standard length and is believed to be a facultative air-breather.
Hypostomus derbyi is a species of catfish in the family Loricariidae. It is native to South America, where it occurs in the basins of the Iguazu River and the Urugua-í River, which are both tributaries of the Paraná River. The species reaches 31 cm in standard length and is believed to be a facultative air-breather.
Hypostomus dlouhyi is a species of catfish in the family Loricariidae. It is native to South America, where it occurs in the Yguazú River basin in the middle Paraná River drainage. The species reaches 24.5 cm SL and is believed to be a facultative air-breather.
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.
Hypostomus boulengeri is a species of catfish in the family Loricariidae. It is native to South America. The species reaches 24.5 cm SL and is believed to be a facultative air-breather.
Hypostomus commersoni is a species of catfish in the family Loricariidae. It is native to South America, where it occurs in the Paraná River drainage, including the Iguazu River, the Paraguay River, the Río de la Plata, and the Dulce River. It is typically found in rivers with muddy substrates and moderate currents. The water that H. commersoni inhabits usually has a temperature of 16.8 to 27.8 °C, a pH of 7.2 to 9.2, a turbidity of 23.7 to 442 NTU, an oxygen concentration of 6.1 to 9.1 mg/L, and a conductivity of 1.087 to 2.654 μS/cm.
Hypostomus delimai is a species of catfish in the family Loricariidae. It is native to South America, where it occurs in the basins of the Araguaia River and the Tocantins River in Brazil. It is typically found in areas with turbid water, riparian vegetation, and a substrate composed of rocks and sand. It is known to be sympatric with other species of Hypostomus, including H. faveolus and H. pyrineusi, as well as species of Aphanotorulus. The species reaches 25.3 cm in standard length and is believed to be a facultative air-breather.
Hypostomus iheringii is a species of catfish in the family Loricariidae. It is native to South America, where it is occurs in the Paraná River drainage basin, being known from the Tietê River basin as well as the Corumbá River, where it is syntopic with Hypostomus ancistroides, H. denticulatus, H. heraldoi, H. margaritifer, and H. regani. The species reaches 11.6 cm in standard length and is believed to be a facultative air-breather.
