Bryconops munduruku (Characiformes: Characidae), a new species of fish from the lower Tapajós River basin, Brazil.

A new species of Bryconops is described from a right tributary of the lower Tapajos River, State of Para, Brazil. Bryconops munduruku , sp. nov., differs from its congeners, except B . inpai and B . piracolina , by having a black adipose fin ( vs . adipose fin hyaline in alcohol) and, except B . inpai , by possessing two humeral blotches ( vs . lack of humeral blotch or only one humeral blotch). Bryconops munduruku differs from B . inpai by having a uniform color pattern on the posterior portion of the side of the body ( vs . a dark stripe extending posteriorly from the half of the anal-fin base onto the base of the middle caudal-fin rays). It differs further from B . inpai and B . piracolina by the presence of a black adipose fin that is hyaline along its base ( vs . entirely black adipose fin in B . inpai and B . piracolina ). The new species is allocated in the subgenus Creatochanes by having a maxillary bone with one to three teeth on both sides, and its posterior extension reaching the junction of second and third infraorbital bones.