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| Corydoras maclurei Tencatt, de Carvalho Gomes & Evers, 2023 |
Abstract
A new species of Corydoras is described from tributaries to the rio Araza, an affluent of the rio Inambari, itself a tributary to the rio Madre de Dios, rio Madeira basin in the Peruvian Amazon. The new species can be distinguished from its congeners by the following features: (I) absence of contact between the posterior process of the parieto-supraoccipital and the nuchal plate, (II) a single, large conspicuous dark brown or black blotch on anterodorsal portion of flank; blotch somewhat rounded to roughly diamond shaped, and (III) absence of dark blotches on fins. General comments on the identity of Corydoras aeneus are also provided.
Keywords: Corydoradinae; Corydoras sp. CW16; Osteology; Rio Madeira basin; Taxonomy
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| Corydoras maclurei, holotype, MUSM 70671, 37.0 mm SL, Camanti District, Quispicanchi Province, Cusco Region, Peru, small stream tributary to the rio Araza, a bigger affluent of the rio Inambari, itself a tributary to the rio Madre de Dios, rio Madeira basin. |
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| Uncatalogued aquarium specimens of Corydoras maclurei (not measured) showing variations of the color pattern in life: specimens can variably present greyish orange (A) or reddish orange (B) ground color of body. In C, the detail of a conspicuously reddish orange dorsal fin. Anterior portion of first dorsolateral body plate typically with orange (D) or yellow (E) bright patch. Photographs (D) and (E) by Ian Fuller. |
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| Uncatalogued aquarium specimen of Corydoras maclurei (A) showing its typical color pattern in life (lateral view), collected in its type-locality (B), a small stream tributary to the rio Araza, rio Madre de Dios basin, rio Madeira basin in Peru. |
Corydoras maclurei, new species
Diagnosis. Corydoras maclurei can be distinguished from its congeners, except for C. difluviatilis Britto & Castro, 2002, C. flaveolus Ihering, 1911, C. gladysae, C. gracilis Nijssen & Isbrücker, 1976, C. hastatus Eigenmann & Eigenmann, 1888, C. hephaestus Ohara, Tencatt & Britto, 2016, C. latus, C. melanotaenia Regan, 1912, C. micracanthus Regan, 1912, C. nanus, C. petracinii, C pygmaeus Knaack, 1966, and C. undulatus Regan, 1912, by the absence of contact between the posterior process of the parieto-supraoccipital and the nuchal plate (vs. bones in contact). The new species can be distinguished from C. difluviatilis, C. flaveolus, C. gladysae, C. gracilis, C. hastatus, C. hephaestus, C. latus, C. melanotaenia, C. micracanthus, C. nanus, C. petracinii, C pygmaeus, and C. undulatus by having just a single, large conspicuous dark brown or black blotch on anterodorsal portion of flank; ...
Etymology: Corydoras maclurei is named in honor of Robert “Rob” McLure, dear friend and renowned Corydoradinae breeder. Rob has been the main English-language reviewer of the first author’s publications, in addition to providing valuable information and live photos of several species of Corydoradinae. A genitive noun.
Luiz Fernando Caserta Tencatt, Vandergleison de Carvalho Gomes and Hans-Georg Evers. 2023. A New Species of Corydoras (Siluriformes: Callichthyidae) from the rio Madre de Dios Basin, Peruvian Amazon, with Comments on Corydoras aeneus Identity. Neotrop. ichthyol. 21 (2); DOI: 10.1590/1982-0224-2023-0023
Resumo: Uma espécie nova de Corydoras é descrita de tributários do rio Araza, um afluente do rio Inambari, por sua vez um tributário do rio Madre de Dios, bacia do rio Madeira na Amazônia peruana. A espécie nova pode ser distinguida de suas congêneres pelas seguintes características: (I) ausência de contato entre o processo posterior do parieto-supraoccipital e a placa nucal, (II) uma única e conspícua mancha marrom escura a preta na porção anterodorsal do flanco; mancha algo arredondada a aproximadamente em forma de diamante, e (III) ausência de manchas escuras nas nadadeiras. Comentários gerais sobre a identidade de Corydoras aeneus são também fornecidos.
Palavras-chave: Bacia do rio Madeira; Corydoradinae; Corydoras sp. CW16; Osteologia; Taxonomia