We confirmed occurrences of Lontra longicaudis (Olfers, 1818) in Seasonally Dry Tropical Forests (Caatinga) of 10 river basins in northeastern Brazil, reporting the first records of the species in five of them. The species was not found in river basins totally inserted in Caatinga, nor where Caatinga borders Cerrado (Piauí state), indicating a gap in the species distribution. We report the first otter occurrence in Piauí, in the Cerrado biome of the southern part of the state. The relevance of these results for Neotropical Otter conservation is discussed, and an update of the species distribution map is proposed.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.