First record of Melanorivulus decoratus (Costa, 1989) (Cyprinodontiformes: Rivulidae) in the lower-middle São Francisco River, Brazil

Primeiro registro de Melanorivulus decoratus (Costa, 1989) (Cyprinodontiformes: Rivulidae) no Submédio Rio São Francisco, Brasil

Abstracts

Abstract  The non-annual rivulid Melanorivulus decoratus is an endemic fish from the São Francisco River basin that was previously recorded only in small tributaries along river’s middle stretch in northwestern Bahia. The present record marks the first appearance of M. decoratus in the lower-middle São Francisco, approximately 450 km northeast of the closest previously documented site, providing an updated map of the species’ distribution. Currently classified as Least Concern (LC), this new occurrence record expands knowledge of the species’ range and conservation status.

Keywords:
Brazilian semiarid; conservation; new record; non-annual rivulids; Rivulinae