A new golden species of Diasporus (Anura: Eleutherodactylidae) from southwestern Colombia, with evaluation of the phylogenetic significance of morphological characters in Diasporus

PeerJ

article

Jhon Jairo Ospina Sarria¹  David Andrés Velásquez Trujillo¹  Christian Oswaldo Castaño Saavedra¹  Luis Fernando Castillo²  Wilmar Bolívar-García¹ 

[1] Calima, Fundación Para la Investigación de la Biodiversidad y Conservación en el Trópico;Calidris;Universidad del Valle, Departamento de Biología

关键词: Amphibia;    Anchicayá;    Diasporus diastema species group;    Evolution;    Phylogeny;    Synapomorphy;    Taxonomy;    Terrarana;   

DOI  :  10.7717/peerj.12765

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

A new species of Diasporus is described from the lowlands of southwestern Colombia. The new species exhibits a yellowish coloration in life, a character that it shares with other three species in the genus—Diasporus citrinobapheus, D. gularis, and D. tigrillo. The new species differs from all other congeners in having two chrome orange spots (=glandlike protrusions) on sacral region, smooth ventral skin, basal webbing between the toes, and distal papillae at tips of disc covers on fingers II–IV and toes II–IV. Further, the new species differs from all congeners by an uncorrected p-distance 5.56% of the 16S rRNA gene fragment examined. In addition to the new species described herein, we demonstrated that the possession of a yellowish coloration in life optimizes unambiguously as a synapomorphy of a clade within Diasporus, which may be recognized as the Diasporus diastema species group. We also discussed the phylogenetic significance of two morphological characters previously considered of systematic value in Diasporus, the occurrence of oval palmar tubercles (undivided) and longitudinal folds (of the vocal sacs) on the throat. On this basis, we demonstrated that these characters appear to be symplesiomorphies rather than synapomorphies of Diasporus. Regarding pointed disc covers (ungual flap) present in some species of Diasporus, we show that this character conflates various characters, involving variation in pad shape, dorsal outline of the disc (ungual flap), and dependence between discs of different digits. Finally, considering that phenotypic data are a valuable source of evidence in testing phylogenetic hypotheses of terraranan frogs, we encourage future research to incorporate phenotypic evidence into phylogenetic studies involved in the genus Diasporus.

【 授权许可】

CC BY