A new species of Moenkhausia Eigenmann (Characiformes: Characidae) from the rio Arinos basin, Brazil

Author(s)

Dagosta, Fernando C. P. ; Marinho, Manoela M. F.

• Document type: Journal article
• Source: Neotropical Ichthyology; v. 14, n. 2 2016.
• Web of Science Citations: 2

Abstract

ABSTRACT A new species of Moenkhausia is described from the rio Arinos drainage, rio Tapajós basin, Mato Grosso, Brazil. The new species is diagnosed from all congeners, except M . hemigrammoides , M . nigromarginata , and Moenkhausia rubra by having intense diffuse dark pigmentation on the dorsal and anal fin-rays. The new species can be distinguished from the above mentioned species by the combination of 20-23 branched anal-fin rays, presence of a vertically elongate roughly rectangular humeral spot surpassing the lateral line ventrally, absence of a well-defined black spot on the distal portion of the dorsal fin and lack of a series of longitudinal dark zigzag stripes on body. The new species is herein described along with a report and discussion of a possible connection between the rio Tapajós and rio Paraguay basins, near Diamantino Municipality, Mato Grosso. (AU)

• FAPESP's process: 11/23419-1 - Biogeographic history of the fishes from the Amazon Basin: a methodological comparative approach
• Grantee: Fernando Cesar Paiva Dagosta
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 14/11911-7 - Heterochrony and miniaturization: a comparative study of ontogeny in the Characidae (Teleostei: Characiformes)
• Grantee: Manoela Maria Marinho Koh
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 11/50282-7 - An inventory of the Characiform fish fauna (Teleostei, Ostariophysi) from South America
• Grantee: Naercio Aquino Menezes
• Support Opportunities: BIOTA-FAPESP Program - Thematic Grants