Distribuição geográfica das espécies do complexo de Parotocinclus jumbo (Loricariidae, Hypoptopomatinae) nas drenagens do nordeste do Brasil

Abstract

The genus Parotocinclus has many beetle species described from the watersheds of Northeastern Brazil, mainly in the Caatinga. Most of these fish have a restricted geographic distribution, usually occurring in a single basin, including endangered species. However, Parotocinclus jumbo has a wide geographic distribution, known in several basins in the Northeast region. In an integrative taxonomy study of this beetle from six of the eight basins in which it occurs, it was indicated that P. jumbo is a species complex with at least four new species, which are in the description phase. Thus, in this work we address some taxonomic uncertainties involving morphological and molecular data of two P. jumbo lineages, which occur in the Coruripe and Capibaribe river basins. The results here suggest that these two lineages belong to the species already identified and in the description phase, with the lineage that occurs in the Capibaribe River belonging to P. jumbo, which also occurs in the Rio Paraíba do Norte, and the lineage present in the Rio Coruripe belonging to Parotocinclus sp. n. 3, present in the basins of the Paraíba do Meio and Ipojuca rivers. Therefore, we suggest the expansion of the geographic distribution of these species so that P. jumbo registers occurrence in the basins of the rivers Paraíba do Norte and Capibaribe; and Parotocinclus sp. n. 3 records occurrence in the basins of the Ipojuca, Paraíba do Meio and Coruripe rivers, being the only species of the group with presence in basins inserted in the Atlantic Forest and Caatinga biomes, which includes relevant information to assess their conservation status.