Soares, Nathália C. [UNESP]Benine, Ricardo C. [UNESP]2020-12-122020-12-122019-11-26Zootaxa, v. 4700, n. 4, p. 487-493, 2019.1175-53341175-5326http://hdl.handle.net/11449/199708A new shallow-bodied species of Moenkhausia is described from the upper Rio Negro, Amazon basin, Brazil. The new species is diagnosed from all congeners by the combination of a body depth not surpassing 33% in SL in adult specimens, seven scale rows between dorsal-fin origin and lateral line, five scale rows between pelvic-fin insertion and lateral line, a single conspicuous vertically elongated humeral blotch, and a conspicuous caudal peduncle blotch extending to the distal margin of the median caudal-fin rays. The new species was collected together with Jupiaba zonata, with which it shares a very similar color pattern. The similarity between these two taxa is interpreted as an additional case of Batesian mimicry between Moenkhausia and Jupiaba.487-493engBatesian mimicryJupiabaPelvic spineSão Gabriel da CachoeiraArtigo10.11646/zootaxa.4700.4.62-s2.0-85075510377