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Issue: Vol. 2123 No. 1: 2 Jun. 2009
Type: Article
Published: 2009-06-02
DOI: 10.11646/zootaxa.2123.1.2
Page range: 46–54
Abstract views: 40
PDF downloaded: 2

A new species of casque-headed tree frog, genus Aparasphenodon Miranda-Ribeiro (Amphibia: Anura: Hylidae), from the Atlantic Rainforest of southern Bahia, Brazil

BBM Consultoria Ambiental Ltda., Av. Prudente de Morais, 621/807, Cidade Jardim, 30380-000, Belo Horizonte, Minas Gerais, Brazil
Museu de Zoologia, Departamento de Zoologia, Instituto de Biologia, Universidade Federal da Bahia, Campus Universitário, Rua Barão de Jeremoabo, Ondina, 40170-115 Salvador, Bahia, Brazil Associate Researcher, Departamento de Vertebrados, Museu Nacional/Universidade Federal do Rio de Janeiro, Quinta da Boa Vista, São Cristóvão, 20940-040 Rio de Janeiro, Rio de Janeiro, Brazil
Departamento de Zoologia, Instituto de Biociências, Universidade Estadual Paulista (UNESP), Caixa Postal 199, 13506-900 Rio Claro, São Paulo, Brazil
Amphibia Aparasphenodon arapapa sp. nov. Casque-headed tree frog Hylinae taxonomy

Abstract

A new species of Aparasphenodon is described from patches of arboreal restinga within the Atlantic Forest Biome, in a region known as Baixo Sul in southern Bahia, northeastern Brazil. Aparasphenodon arapapa sp. nov. is promptly diagnosed from other Aparasphenodon mainly by having small size (male snout-vent length 57.4–58.1 mm), loreal region flattened and wide, and canthus rostralis rounded and poorly elevated. The wide and flattened snout resembles that found in Triprion and Diaglena, and possibly is a parallelism (homoplasy) related to the phragmotic behavior of casque-headed tree frogs to their microhabitat usage. The decision to allocate the new species in the genus Aparasphenodon is discussed in detail, as the single morphological synapomorphy of the genus, the presence of a prenasal bone, is insufficient to morphologically relate the new species to Aparasphenodon, Triprion, or Diaglena.

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