Systematics of Ecnomiohylatuberculosa with the description of a new species and comments on the taxonomy of Trachycephalustyphonius (Anura Hylidae)

摘要

Ecnomiohyla tuberculosa is an Amazonian hylid of uncertain phylogenetic position. Herein DNA sequences of mitochondrial and nuclear genes are used to determine its phylogenetic relationships. New sequences and external morphology of Trachycephalus typhonius are also analyzed to assess the status of Ecuadorian and Peruvian populations. The phylogeny shows unequivocally that Ecnomiohyla tuberculosa is nested within the genus Tepuihyla, tribe Lophiohylini. This position was unexpected because the remaining species of Ecnomiohyla belong to the tribe Hylini. To solve the paraphyly of the genus Ecnomiohyla, Ecnomiohyla tuberculosa is transferred to the genus Tepuihyla. Comparisons of DNA sequences, external morphology, and advertisement calls between populations of Ecnomiohyla tuberculosa from Ecuador and Peru indicate that the Peruvian population represents an undescribed species. The new species is described and a species account is provided for Ecnomiohyla tuberculosa. Trachycephalus typhonius is paraphyletic relative to Trachycephalus cunauaru, Trachycephalus hadroceps, and Trachycephalus resinifictrix. The phylogenetic position of populations from western Ecuador indicates that they represent a species separate from Trachycephalus typhonius sensu stricto. We resurrect the name Hyla quadrangulum (Trachycephalus quadrangulum >comb. n.) for those populations. Amazonian populations of “Trachycephalustyphonius” from Ecuador and Peru are genetically and morphologically distinct from Trachycephalustyphoniussensu stricto and are conspecific with the holotype of Hylamacrotis. Therefore, we also resurrect Hylamacrotis, a decision that results in Trachycephalusmacrotis>comb. n.