Monday, April 30, 2018

[Ichthyology • 2018] Hisonotus devidei • A New Species (Siluriformes: Loricariidae) from the São Francisco Basin, Brazil


 Hisonotus devidei 
Roxo, Silva & Melo, 2018

Abstract
A recent expedition to headwaters of the Rio Pandeiros, a left‐bank tributary of the Rio São Francisco revealed the presence of a fourth species of Hisonotus from that basin. Hisonotus devidei sp. nov. differs from congeners by the presence of conspicuous dark blotches of distinct shapes irregularly arranged along lateral and dorsal surfaces of the body and scattered throughout all fins, by possessing small plates in lateral portions of the abdomen and adjacent areas between pelvic fins without development of dermal plates and by morphometric ratios. The putative phylogenetic placement of the new species is discussed based on morphological comparisons with species of related Hypoptopomatinae genera and the Hisonotus species diversity within the Rio São Francisco Basin is compared with that of adjacent basins.

Keywords: cascudinhos, freshwater, Hypoptopomatinae, Neotropics, taxonomy


Figure 1 Hisonotus devidei sp. nov., MZUSP 123294, holotype, female, 28·9 mm standard length, Córrego Catolé, Rio Pandeiros, Rio São Francisco basin.

Hisonotus devidei sp. nov

Etymology: The epithet devidei honours Renato Devidé, a dear friend and collector of the species, for his immeasurable contribution during more than 30 years as an academic technician in the LBP fish collection, assisting and coordinating expeditions that resulted in numerous scientific publications, theses and dissertations in the fields of ecology, cytogenetics, population genetics, taxonomy, systematics and evolution of Neotropical fishes.

F. F. Roxo, G. S. C. Silva and B. F. Melo. 2018. Hisonotus devidei, A New Species from the São Francisco basin, Brazil (Siluriformes: Loricariidae). Journal of Fish Biology. DOI:  10.1111/jfb.13599

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