Kok Philippe J R, Nicolaï Michaël P J, Lathrop Amy, MacCulloch Ross D
Amphibian Evolution Lab, Department of Biology, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels, Belgium.
Department of Biology, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels, Belgium.
Zookeys. 2018 May 22(759):99-116. doi: 10.3897/zookeys.759.24742. eCollection 2018.
Recent extinctions and drastic population declines have been documented in the Guiana Shield endemic frog genus , hence the importance to resolve its alpha-taxonomy. Based on molecular phylogenies, the literature has long reported the occurrence of an undescribed species in the Pakaraima Mountains of Guyana in the Pantepui region. We here describe this new taxon and demonstrate that in addition to divergence at the molecular level the new species differs from congeners by a unique combination of morphological characters, notably a small size (maximum SVL in males 18.86 mm, maximum SVL in females 21.26 mm), Finger I = Finger II when fingers adpressed, Finger III swollen in breeding males, fringes on fingers absent, toes basally webbed but lacking fringes, in life presence of a thin dorsolateral stripe from tip of snout to tip of urostyle, and a black throat in preserved males (immaculate cream in females). Virtually nothing is known about the ecology of the new species. We suggest the new species to be considered as Data Deficient according to IUCN standards.
圭亚那地盾特有蛙属近期出现了物种灭绝和种群数量急剧下降的情况，因此解决其科级分类问题十分重要。基于分子系统发育学，长期以来文献报道在潘泰普伊地区圭亚那的帕卡赖马山脉存在一个未描述的物种。我们在此描述这个新分类单元，并证明除了分子水平上的差异外，新物种在形态特征上也有独特组合，与同属其他物种不同，特别是体型小（雄性最大体长18.86毫米，雌性最大体长21.26毫米），手指并拢时第一指等于第二指，繁殖期雄性第三指肿胀，手指无边缘，脚趾基部有蹼但无边缘，活体时从吻端到尾骨末端有一条细的背外侧条纹，保存的雄性喉部为黑色（雌性为纯净的奶油色）。关于这个新物种的生态几乎一无所知。我们建议根据世界自然保护联盟的标准，将这个新物种视为数据缺乏物种。
