Fouquet Antoine, Vacher Jean-Pierre, Courtois Elodie A, Villette Benoit, Reizine Hugo, Gaucher Philippe, Jairam Rawien, Ouboter Paul, Kok Philippe J R
Laboratoire Ecologie, Evolution, Interactions des Systèmes Amazoniens (LEEISA), USR3456, Cayenne, French Guiana Laboratoire Evolution et Diversité Biologique (EDB), UMR5174, Toulouse, France PLECO, Antwerp University, Antwerp, Belgium.
Zootaxa. 2018 Feb 13;4379(1):1-23. doi: 10.11646/zootaxa.4379.1.1.
A large portion of the amphibian species occurring in Amazonia remains undescribed. A recent study on species delineation in Anomaloglossus, a genus endemic to the Guiana Shield, demonstrated the existence of two undescribed species previously identified as A. degranvillei, which we describe herein. In addition to divergence at the molecular level, these two new taxa are also distinguished by subtle morphological characters and substantial differences in the advertisement calls (note length, dominant frequency, note structure). One species occurs in the hilly lowlands of north-eastern French Guiana and is mainly distinguished from its closest relatives by a small body size (15.9-18.8 mm in males) and by vocalisations characterized by the emission of short notes of 0.09 s on average. The other species is only known from the Itoupé Massif in southern French Guiana and is mainly distinguished from its closest relatives by a moderate body size (19.4-20.4 mm in males) and by vocalisations characterized by the emission of long notes of 0.23 s on average. We also provide amended definitions for two previously described species in the A. degranvillei species group: A. degranvillei, which is endemic to a few massifs in central French Guiana, and A. surinamensis, which is distributed throughout Suriname and French Guiana. The new species described here and A. degranvillei have very narrow ranges within French Guiana and seem to have rapidly declined during the last decade. Therefore, we suggest A. degranvillei and A. dewynteri to be considered as "Critically Endangered" and A. blanci as "Vulnerable" according to the IUCN standards.
亚马逊地区存在的大部分两栖动物物种仍未被描述。最近一项关于圭亚那地盾特有的Anomaloglossus属物种划分的研究表明，存在两个先前被鉴定为德氏姬蛙（A. degranvillei）的未描述物种，我们在此对其进行描述。除了分子水平上的差异外，这两个新分类群在形态特征上也有细微差别，在求偶鸣叫方面（音符长度、主频、音符结构）也存在显著差异。其中一个物种分布在法属圭亚那东北部的丘陵低地，主要与其近亲的区别在于体型较小（雄性体长15.9 - 18.8毫米），其叫声特点是平均发出时长0.09秒的短音符。另一个物种仅在法属圭亚那南部的伊图佩地块被发现，主要与其近亲的区别在于体型中等（雄性体长19.4 - 20.4毫米），其叫声特点是平均发出时长0.23秒的长音符。我们还对德氏姬蛙物种组中两个先前描述的物种进行了修订定义：德氏姬蛙，它是法属圭亚那中部少数地块特有的物种；苏里南姬蛙（A. surinamensis），分布于苏里南和法属圭亚那全境。这里描述的新物种和德氏姬蛙在法属圭亚那的分布范围非常狭窄，在过去十年中似乎数量急剧下降。因此，根据国际自然保护联盟（IUCN）的标准，我们建议将德氏姬蛙和德温氏姬蛙（A. dewynteri）列为“极度濒危”物种，将布兰氏姬蛙（A. blanci）列为“易危”物种。
