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Article
Published: 2020-10-28

A new species of the Rhinella margaritifera (Laurenti 1768) species group (Anura, Bufonidae) from southern Brazilian Amazonia

Departamento de Biologia, Centro de Ciências, Campus do Pici, Universidade Federal do Ceará, Fortaleza, Ceará, Brazil.
Universidade Federal de Uberlândia—Instituto de Ciências Agrárias, LMG-746, Km 1, Monte Carmelo, Minas Gerais, Brazil.
Programa de Pós-Graduação em Ecologia, Universidade Federal Rural de Pernambuco, Recife, Pernambuco, Brazil.
Centro de Referência da Biodiversidade Regional, Pós-Graduação em Ecologia e Conservação da Biodiversidade, Universidade Federal de Mato Grosso, Cuiabá, Mato Grosso, Brazil
Laboratório de Evolução e Genética Animal, Departamento de Genética, Instituto de Ciências Biológicas, Universidade Federal do Amazonas, Manaus, Amazonas, Brazil rograma de Pós-Graduação em Diversidade Biológica e Recursos Naturais, Universidade Regional do Cariri, Crato, Ceará, Brazil.
Laboratório de Evolução e Genética Animal, Departamento de Genética, Instituto de Ciências Biológicas, Universidade Federal do Amazonas, Manaus, Amazonas, Brazil
Departamento de Biologia, Programa de Pós Graduação em Zoologia, Instituto de Ciências Biológicas, Universidade Federal do Amazonas, Manaus, Amazonas, Brazil.
Laboratório de Evolução e Genética Animal, Departamento de Genética, Instituto de Ciências Biológicas, Universidade Federal do Amazonas, Manaus, Amazonas, Brazil
Amphibia Neotropical Rainforest Systematics Taxonomy

Abstract

Neotropical toads from the Rhinella margaritifera species group have been considered a taxonomic puzzle for a long time. Because of the high morphological similarity and an unknown number of undescribed taxa among the species of this group, we did an extensive search for character distribution within all nominal taxa. Herein we describe Rhinella parecis sp. nov. a new species from Southern Brazilian Amazon. We provide a morphological diagnosis, morphometric comparisons with similar species, and a molecular phylogenetic hypothesis on the relationships of the new species. Rhinella parecis sp. nov. is assigned to the R. margaritifera group and differs from others species by snout-vent length ranging 40.7–53.5 mm in males (n=12) and 44.9–54.8 mm in females (n=4), snout rounded in dorsal view, acute with fleshy ridge extending to tip of snout in lateral view, canthal and pre-orbital crests absent, supra-orbital, parietal and supra-tympanic crests present and low, dorsolateral row of tubercles present, bony protrusion at the angle of jaws absent, tympanum evident, vertebral apophyses absent and toes half-webbed. The new species is the 20th species associated to the R. margaritifera group distributed in the Chapada dos Parecis, a probable center of endemism in states of Rondônia and Mato Grosso, Brazil.

 

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