A new species of Astyanax (Characiformes: Characidae) from the rio de Contas basin, Bahia, Brazil

Author(s)

Angela Maria Zanata ^[1] ; Rafael Burger ^[2] ; George Vita ^[3] ; Priscila Camelier ^[4]

Affiliation

^[1] Universidade Federal da Bahia. Instituto de Biologia - Brasil

^[2] Universidade Federal da Bahia. Instituto de Biologia - Brasil

^[3] Universidade de São Paulo. Museu de Zoologia - Brasil

^[4] Universidade Federal da Bahia. Instituto de Biologia - Brasil

• Document type: Journal article
• Source: Neotropical Ichthyology; v. 17, n. 3 2019-10-24.

Abstract

ABSTRACT A new species of Astyanax from tributaries of the rio de Contas, Bahia, Brazil, is described. The new species differs from congeners by having three horizontal series of scales from lateral line to pelvic-fin origin and the distal margin of third infraorbital distinctly separated from vertical and horizontal limbs of preopercle, leaving a broad area not covered by superficial bones. The new species further differs from most congeners by the presence of bony hooks on all fins of mature males. Particularly from congeners occurring in rivers of the Northeastern Mata Atlântica freshwater ecoregion, it further differs by having the highest body depth just anterior to the dorsal-fin origin, 34-37 pored lateral line scales, a vertically elongated conspicuous dark humeral blotch reaching below the lateral line and a conspicuous dark wide midlateral stripe extending from the clear area on the rear of the humeral blotch to the end of middle caudal-fin rays and forming an inconspicuous blotch on caudal peduncle. (AU)

• FAPESP's process: 16/19075-9 - Diversity and evolution of Gymnotiformes (Teleostei, Ostariophysi)
• Grantee: Naercio Aquino Menezes
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 17/09321-5 - Miniature Characiformes (Teleostei: Ostariophysi): evolution, diversity and biogeography
• Grantee: Manoela Maria Marinho Koh
• Support Opportunities: BIOTA-FAPESP Program - Young Investigators Grants