Taxonomic identity of Adelophryne (Anura, Eleutherodactylidae) populations in the Atlantic Forest in Minas Gerais, Brazil

Adriano Lima Silveira, Camila Rabelo Rievers, Lucas Soares Vilas Boas Ribeiro, Tiago Teixeira Dornas, Taís Nogueira Fernandes

Abstract


The genus Adelophryne is composed of small frogs distributed discontinuously through in South America. The identity of its southernmost populations in the Atlantic Forest biome (Brazil) has been studied only recently, and the identification of some populations in Minas Gerais State remain uncertain, despite suggestions that they might be A. meridionalis. Using field samplings and specimens in amphibians collection, we analyzed 100 specimens of Adelophryne from three Atlantic Forest regions of Minas Gerais and from the type-locality region. All specimens were identified as A. glandulata because they had the main diagnostic characteristics of the species external morphology. Adelophryne glandulata is previously known only from Santa Teresa, Espírito Santo, and here we present another 17 records localities within the disjunct area of occurrence of this species: Piracicaba River and Gualaxo do Norte River region in Mariana and Ouro Preto, Quadrilátero Ferrífero region (MG); central mountainous region of Itabira, Quadrilátero Ferrífero (MG); Parque Estadual do Rio Doce, in the Vale do Rio Doce (MG); and mountainous region of Santa Teresa (ES); across an altitudinal range 675-922 m. The new records contradict the microendemic distribution pattern of Adelophryne species and emphasize the need to evaluate the conservation status of A. glandulata.

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