Data from: New species of Arthroleptis (Anura: Arthroleptidae) from Ngozi Crater in the Poroto Mountains of southwestern Tanzania

A new species of squeaker frog (Arthroleptis) is described from Ngozi Crater in the Poroto Mountains of southwestern Tanzania. The holotype, and only specimen, was collected 80 years ago but remained undescribed because of past taxonomic confusion relating to large-bodied species of Arthroleptis from eastern Africa. Morphological study, including multivariate analysis of measurement data, indicates that this new species is distinguishable from other species of Arthroleptis, including large-bodied species such as Arthroleptis adolfifriederici, Arthroleptis affinis, Arthroleptis nikeae, Arthroleptis nguruensis, and Arthroleptis tanneri. The new species differs from other described species of Arthroleptis by the combination of its large body size, relatively long toes, and relatively small tympanum. The description of this new species further highlights the biological diversity of the Southern Rift Mountains.

本研究描述了采自坦桑尼亚西南部波罗托山脉恩戈齐火山口的尖吻蛙属（Arthroleptis）一新物种。该物种的正模标本（亦是唯一馆藏标本）于80年前被采集，但由于此前东非地区尖吻蛙属大体型类群存在分类学混淆问题，该物种始终未被正式发表描述。本研究通过形态学分析，包括对测量数据的多变量统计分析，证实该新物种可与其他尖吻蛙属物种相区分，其中包括阿道夫尖吻蛙（Arthroleptis adolfifriederici）、近缘尖吻蛙（Arthroleptis affinis）、耐克尖吻蛙（Arthroleptis nikeae）、恩古鲁尖吻蛙（Arthroleptis nguruensis）以及坦纳尖吻蛙（Arthroleptis tanneri）等大体型类群。该新物种凭借大体型、相对修长的趾部以及相对小巧的鼓膜这一特征组合，区别于其他已正式描述的尖吻蛙属物种。该新物种的正式描述进一步凸显了南裂谷山脉的生物多样性。