A new potentially Endangered species of <i>Megophrys</i> (Amphibia: Megophryidae) from Mount Ky Quan San, north-west Vietnam

The genus <i>Megophrys</i> is known to harbour morphological cryptic species diversity. During field work on Vietnam’s third highest peak, Mount Ky Quan San, north-west Vietnam, we collected specimens of a new species of <i>Megophrys</i> at two locations more than 2000 m above sea level (asl). Phylogenetic analyses using mitochondrial markers place the new species within the subgenus <i>Panophrys</i>, a primarily Chinese radiation within the genus <i>Megophrys</i>. We describe the species based on an all-male type series and distinguish it from all other <i>Megophrys</i> species from mainland Southeast Asia, north of the Isthmus of Kra and nearby provinces of China (Yunnan, Guangxi and Guizhou) based on morphological, molecular and bioacoustic data. The new species is inferred to form a clade along with <i>M. hoanglienensis</i> and <i>M. fansipanensis</i>; it is syntopic with the former but has a non-overlapping range with the latter. Uncorrected <i>p</i> distances for the 16S rDNA and CO1 genes between the new species and closest relatives exceed values observed between other closely related species in the <i>Panophrys</i> subgenus. The new species is most similar to <i>M. fansipanensis</i> in terms of morphology, and several call parameters also overlap with this species; however, these two species call at different times of year. This is the fourth likely range-restricted and Endangered <i>Megophrys</i> species described from the Hoang Lien Range since 2017, and this discovery further highlights the significance of the Hoang Lien Range for Vietnam’s amphibian diversity. http://zoobank.org/NomenclaturalActs/69340DD7-B21E-4DD0-836F-6741878013BB

已知角蟾属（Megophrys）存在形态隐存物种多样性。本研究在越南西北部第三高峰吉泉山（Mount Ky Quan San）的野外调查期间，于两处海拔超2000米（asl）的采样点采集到了角蟾属一新种标本。基于线粒体标记的系统发育分析显示，该新种隶属于角蟾属下的拟角蟾亚属（Panophrys）——该亚属为角蟾属中主要分布于中国的演化辐射类群。本研究基于全雄性模式标本系列对该新种进行形态描述，并通过形态学、分子生物学及生物声学数据，将其与克拉地峡以北的东南亚大陆及中国邻近省份（云南、广西、贵州）的所有其他角蟾属物种进行了区分。该新种被推测与黄莲角蟾（Megophrys hoanglienensis）和番西邦角蟾（Megophrys fansipanensis）构成单系支；它与前者同域分布，但与后者的分布范围无重叠。该新种与近缘类群的16S rDNA及CO1基因的未校正p距离，高于拟角蟾亚属（Panophrys）内其他近缘物种间的对应数值。该新种在形态上与番西邦角蟾最为相似，且部分鸣唱参数也与该物种重叠，但二者的鸣唱时节存在差异。自2017年以来，本研究是第4个从黄连山山脉（Hoang Lien Range）地区发表的、分布区狭窄且大概率为濒危的角蟾属物种，该发现进一步凸显了黄连山山脉对于越南两栖动物多样性的重要意义。http://zoobank.org/NomenclaturalActs/69340DD7-B21E-4DD0-836F-6741878013BB

搜集汇总

背景与挑战

背景概述

该数据集包含越南西北部Ky Quan San山新发现的潜在濒危Megophrys物种的研究数据，包括形态学、分子和生物声学信息。数据集支持了该新物种的分类描述，并显示其属于Panophrys亚属，与邻近物种有显著差异，进一步强调了Hoang Lien山脉对两栖动物多样性的保护意义。