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| Baryancistrus micropunctatus
de Oliveira, Rapp Py-Daniel & Oyakawa, 2019
DOI: 10.1643/CI-19-201
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Abstract
Two new species of the suckermouth armored catfish genus Baryancistrus are described from the Jari River basin, at the border of Pará and Amapá states, Brazil. The new species are the first representatives of the genus described from rivers draining the Guiana shield, and can be distinguished from their congeners by color pattern and a combination of nonexclusive characters. Baryancistrus micropunctatus, new species, has a color pattern similar to B. longipinnis from the Tocantins River, whereas Baryancistrus hadrostomus, new species, has a color pattern that is unique for the genus, with a gray to black body covered by small and widely spaced white points. The first exemplars of the two new species were collected in the late 1980s by INPA ichthyological staff, and in 2007 additional materials were collected by the Museu de Zoologia da Universidade de São Paulo (MZUSP), providing a foundation for this description of the new species.
Etymology.—The specific name micropunctatus is a combination of the Latin micro, meaning small, and punctatus, meaning dots, in reference to the small dots over the whole body in this species. An adjective.
Baryancistrus hadrostomus, new species
Etymology.— The specific name, hadrostomus, is from the Greek hadros, meaning ‘‘well developed, large,’’ and stoma, meaning ‘‘mouth,’’ in allusion to the extremely large oral disk in this species. An adjective.
Renildo Ribeiro de Oliveira, Lúcia Rapp Py-Daniel and Osvaldo Takeshi Oyakawa. 2019. Two New Species of the Armored Catfish Genus Baryancistrus Rapp Py-Daniel, 1989 (Siluriformes: Loricariidae) from Jari River, Amazon Basin, Brazil. Copeia. 107(3); 481-492. DOI: 10.1643/CI-19-201
Etymology.— The specific name, hadrostomus, is from the Greek hadros, meaning ‘‘well developed, large,’’ and stoma, meaning ‘‘mouth,’’ in allusion to the extremely large oral disk in this species. An adjective.
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| Fig. 3. Baryancistrus micropunctatus, MZUSP 103356, paratype, 150.6 mm SL (A); Baryancistrus hadrostomus, uncatalogued (B); Amapá, Santo Antonio waterfall.
Live specimens photographed by J. L. Birindelli.
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Renildo Ribeiro de Oliveira, Lúcia Rapp Py-Daniel and Osvaldo Takeshi Oyakawa. 2019. Two New Species of the Armored Catfish Genus Baryancistrus Rapp Py-Daniel, 1989 (Siluriformes: Loricariidae) from Jari River, Amazon Basin, Brazil. Copeia. 107(3); 481-492. DOI: 10.1643/CI-19-201
