https://onlinelibrary.wiley.com/doi/abs ... /jfb.15046
ABSTRACTThe trichomycterid catfish , new species, is described from a flooded area adjacent to Rio das Panelas, Rio São João basin, Cachoeiras de Macacumunicipality, Rio de Janeiro State, Brazil. It represents a most valuable remnant of Atlantic Forest biome that still resists devastation of Brazilian coastlands. Listrura menezesi can be distinguished from its congeners, except L. boticario and L. depinnai, by the absence of dorsal fin. It mainly differs from L. boticario and L. depinnai by a continuous midlateral dark stripe along the entire body (vs. discontinuous) and a longitudinal row of irregular dots along the dorsal limit of abdomen extending for nearly the entire body (vs. only on posterior half of body in L. boticario and pigmentation on anterior half of body not forming a distinct row in L. depinnai). Although the new species shares with L. boticario and L. depinnai the absence of dorsal fin, recent phylogenetic analyses show a close relationship between L. menezesi and L. macaensis, the latter having a dorsal fin. A putative apomorphic condition for this clade is presented: the abrupt widening on the mesethmoid axis starting posteriorly on horizontal through middle region of the autopalatine (vs. anteriorly, on horizontal through anterior region of the autopalatine). Listrura menezesi comes as an addition to the ichthyofauna of the Rio São João drainage, a region extensively sampled for the past 20 years and supposedly well-known. This paper also highlighting the vulnerability of this species and the possibility of its disappearance in the near future.
- Key words: Atlantic Rain Forest, Catfish, Rio São João basin, Taxonomy.