10/15/2026
๐ฆ๐๐ ๐๐๐๐๐๐๐ ๐๐๐ ๐๐, a new species of annual killifish (Rivulidae), is described from a temporary reservoir located in the upper drainage of the rio Paracatu, a tributary of the rio Sรฃo Francisco basin, in the state of Minas Gerais, Brazil.
๐ป๐ฆ๐๐ ๐๐๐๐๐๐๐ ๐๐๐ ๐๐, a new species of annual killifish (Rivulidae), is described from a temporary reservoir located in the upper drainage of the rio Paracatu, a tributary of the rio Sรฃo Francisco basin, in the state of Minas Gerais, Brazil. This killifish is described in this study along with two other new species (following posts). All three new species are assessed by the authors as Critically Endangered.
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Three new species of cloud fish of genus ๐ป๐ฆ๐๐ ๐๐๐๐๐๐๐ (Cyprinodontiformes: Rivulidae) from rio Sรฃo Francisco basins, Northeast Brazil
Open access: https://www.scielo.br/j/ni/a/5BHy7jspQJ7Z8KYchrHcmYF/
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Nielsen DTB, Yoshinaga T, Lira FO de, Silva MJ da. Three new species of cloud fish of genus ๐ป๐ฆ๐๐ ๐๐๐๐๐๐๐ (Cyprinodontiformes: Rivulidae) from rio Sรฃo Francisco basins, Northeast Brazil. Neotrop ichthyol [Internet]. 2026;24(3):e250072. Available from: https://doi.org/10.1590/1982-0224-2025-0072
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Three new species are described from a temporary reservoir located in the upper drainage of the rio Paracatu, a tributary of the rio Sรฃo Francisco basin, in the Minas Gerais State, Brazil. A high concentration of endemic species of annual fishes belonging to the ๐ป๐ฆ๐๐ ๐๐๐๐๐๐๐ ๐ก๐๐๐๐๐๐๐๐ก๐ข๐ species group has been recorded in a small area encompassing the plateaus associated with the upper drainage of the rio Paracatu. These species can be distinguished from other ๐ป๐ฆ๐๐ ๐๐๐๐๐๐๐ species, except those belonging to the ๐ป. ๐ก๐๐๐๐๐๐๐๐ก๐ข๐ complex, by the presence of a dark metallic ochre-yellow coloration on the anterior portion of the male flanks; absence of humeral marks, black blotches on the anterior portion of the male flanks; and light-red pectoral fins in males. Examination of ๐ป. ๐ก๐๐๐๐๐๐๐๐ก๐ข๐ group specimens from the upper rio Paracatu revealed three new species that can be separated from their congeners based on the flank color pattern in males and differences in morphometric traits. Here, we describe three new species of the ๐ป. ๐ก๐๐๐๐๐๐๐๐ก๐ข๐ species group and report the ongoing decline of habitat in their areas of occurrence in the northwestern region of Minas Gerais State.
All three species were assessed as Critically Endangered (CR). A key to identification of the species of ๐ป๐ฆ๐๐ ๐๐๐๐๐๐๐ ๐ก๐๐๐๐๐๐๐๐ก๐ข๐ species group is provided.
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The specific epithet honours Joรฃo Guimarรฃes Rosa, a Brazilian poet, diplomat, novelist, short story writer and physician, considered by many to be the greatest Brazilian writer of the 20th century and one of the greatest of all time. His most notable work was โGrande Sertรฃo Veredasโ, which is set in the region where the new species, occurs. A noun in a genitive case.
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๐ป๐ฆ๐๐ ๐๐๐๐๐๐๐ ๐๐๐ ๐๐, ZUEC 18374, male, holotype, 28.2 mm SL: Brazil, Minas Gerais, Paracatu. Photo by Thomas Yoshinaga.
ยฉ 2026 the Author(s). Published in the journal Neotropical Ichthyology. An open access article, distributed under the terms of the Creative Commons Attribution 4.0 International (CC-BY-4.0) licence. https://creativecommons.org/licenses/by/4.0/
