Wednesday 12 August 2020

NOVATAXA: New Species of Curimatopsis

[Ichthyology • 2020] Curimatopsis sabana • A New Species of Curimatopsis (Characiformes: Curimatidae) from the río Caroni, Orinoco basin, Venezuela, with Comments on C. macrolepis

Curimatopsis sabana 
Melo, 2020

A new species of Curimatopsis is described from the highlands of the western Guiana Shield in the río Carapo and río Paragua, tributaries of the río Caroni in the Orinoco basin, southeastern Venezuela. The new species belongs to the Curimatopsis macrolepis clade due to its possession of a long lower jaw that projects past the anterior margin of the upper jaw, and separate first and second hypurals. The new species is diagnosed from remaining species of the Curimatopsis macrolepis clade by having a small-sized inconspicuous dark spot on the midlateral surface of the caudal peduncle, by details of body and fin pigmentation, and by additional morphometric characters. The distribution of C. macrolepis in the Amazon and Orinoco basins is updated based on the examination of museum specimens.

Keywords: Gran Sabana; Guiana Shield; Ostariophysi; Teleostei

FIGURE 1: Curimatopsis sabana, AMNH 274996, holotype, 36.5 mm SL, female, Venezuela, Bolívar, río Paragua, río Caroni, Orinoco basin (top). AUM 36458, paratype, 43.5 mm SL, male, Venezuela, Bolívar, río Paragua, río Caroni, Orinoco basin (bottom).

FIGURE 4: Species of the Curimatopsis macrolepis clade:
A-B) C. macrolepis, LBP 22425, rio Solimões, Letícia, Colombia;
C) C. jaci, female, MZUSP 121197, holotype, rio Cristalino, upper Tapajós basin; D) C. jaci, male, MZUSP 116668, paratype, rio São Benedito, upper Tapajós basin;
E) C. maculosa, LBP 13907, paratype, middle rio Tapajós; F) C. melanura, MPEG 15335, holotype, rio Nhamundá;
Curimatopsis sabana, female, AMNH 274996, holotype, río Caroni basin; H) C. sabana, male, AUM 36458, paratype, río Caroni basin.
 Photos by Bruno Melo (A-E, G-H) and Guilherme Dutra (F).

Curimatopsis sabana
, new species

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