Hypostomus sertanejo (Siluriformes: Loricariidae), new armoured catfish species from north‐eastern Brazil

A re‐evaluation of the armoured catfish species of Hypostomus in the Rio Jaguaribe, north‐eastern Brazil, was prompted by the discovery of specimens with pale spots on a dark background collected from that basin c. 1936 and deposited at the Academy of Natural Sciences of Philadelphia. Recent field c...

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Bibliographic Details
Published in:Journal of fish biology 2017-07, Vol.91 (1), p.317-330
Main Authors: Zawadzki, C. H., Ramos, T. P. A., Sabaj, M.
Format: Article
Language:English
Subjects:
Animal Fins - anatomy & histology
Animal Scales - anatomy & histology
Animals
armoured catfishes
Brazil
cascudos
Catfish
Catfishes - anatomy & histology
Catfishes - classification
Collections
Ecosystem
Evaluation
Fin ray counts
Fins
fish taxonomy
Freshwater fishes
Head
Hypostominae
Hypostomus
Meristic counts
Natural sciences
Neotropical fishes
New species
Physical characteristics
Shells
Skin
Skin Pigmentation
Species
Spots
Synonymy
Teeth
Tooth - anatomy & histology
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Summary:A re‐evaluation of the armoured catfish species of Hypostomus in the Rio Jaguaribe, north‐eastern Brazil, was prompted by the discovery of specimens with pale spots on a dark background collected from that basin c. 1936 and deposited at the Academy of Natural Sciences of Philadelphia. Recent field collections in the Rio Jarguaribe basin confirmed the presence of the pale‐spotted specimens and its distinctiveness as a new species. Hypostomus sertanejo n. sp. is diagnosed from other species of Hypostomus by having fins and dermal‐plated regions of head and body with pale spots or vermiculations on darker background, teeth slender, asymmetrically bicuspid and numerous (34–75) on dentary and premaxilla, depressed dorsal‐fin spine not reaching adipose spine, unbranched pectoral‐fin spine longer than unbranched pelvic‐fin ray, seven branched dorsal‐fin rays and one (rarely two) predorsal plate(s) bordering supraoccipital. Ancistrus salgadae Fowler 1941 is hypothesized to be a junior synonym of Hypostomus carvalhoi (Miranda‐Ribeiro, 1937), a dark‐spotted Hypostomus described from the Rio Granjeiro, a tributary to the upper Rio Salgado.
ISSN:0022-1112
1095-8649
DOI:10.1111/jfb.13349