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Consequences of parallel miniaturisation in Microhylinae (Anura, Microhylidae), with the description of a new genus of diminutive South East Asian frogs
Zoosystematics and Evolution ( IF 1.6 ) Pub Date : 2021-01-12 , DOI: 10.3897/zse.97.57968
Vladislav A. Gorin , Mark D. Scherz , Dmitriy V. Korost , Nikolay A. Poyarkov

The genus Microhyla Tschudi, 1838 includes 52 species and is one of the most diverse genera of the family Microhylidae, being the most species-rich taxon of the Asian subfamily Microhylinae. The recent, rapid description of numerous new species of Microhyla with complex phylogenetic relationships has made the taxonomy of the group especially challenging. Several recent phylogenetic studies suggested paraphyly of Microhyla with respect to Glyphoglossus Günther, 1869, and revealed three major phylogenetic lineages of mid-Eocene origin within this assemblage. However, comprehensive works assessing morphological variation among and within these lineages are absent. In the present study we investigate the generic taxonomy of Microhyla–Glyphoglossus assemblage based on a new phylogeny including 57 species, comparative morphological analysis of skeletons from cleared-and-stained specimens for 23 species, and detailed descriptions of generalized osteology based on volume-rendered micro-CT scans for five species–altogether representing all major lineages within the group. The results confirm three highly divergent and well-supported clades that correspond with external and osteological morphological characteristics, as well as respective geographic distribution. Accordingly, acknowledging ancient divergence between these lineages and their significant morphological differentiation, we propose to consider these three lineages as distinct genera: Microhylasensu stricto, Glyphoglossus, and a newly described genus, Nanohylagen. nov.

中文翻译:

微型蛙(阿努拉,微型蛙)中平行微型化的后果,并描述了一种小型东南亚蛙类

Microhyla Tschudi属,1838年,有52种,是Microhylidae科中最多样化的属之一,是亚洲Microhylinae科中物种最多的分类群。最近,对具有复杂系统进化关系的许多新的Microhyla物种的快速描述,使得该组的分类特别具有挑战性。最近的几项系统发育研究表明,Microhyla与GlyphoglossusGünther(1869年)有关,并且揭示了该组合中始新世中期的三个主要系统发育谱系。但是,缺乏评估这些谱系之间和内部的形态变异的全面工作。在本研究中,我们基于包括57种在内的新系统发育学,研究了Microhyla-Glyphoglossus组合的通用分类学,对23种已清除和染色样本的骨骼进行了比较形态学分析,并基于对5种进行体积绘制的Micro-CT扫描得出的广义骨学的详细说明,这些代表了该组中的所有主要谱系。结果证实了三个具有高度差异性和良好支撑的进化枝,它们与外部和骨形态学特征以及各自的地理分布相对应。因此,考虑到这些谱系之间的古老差异及其明显的形态学差异,我们建议将这三个谱系视为不同的属:Microhylasensu stricto,Glyphoglossus和新近描述的一个属Nanohylagen。十一月 以及基于体积渲染的微型CT扫描对5种物种的广义骨科的详细描述,这些物种总共代表了该组中的所有主要血统。结果证实了三个具有高度差异性和良好支撑的进化枝,它们与外部和骨形态学特征以及各自的地理分布相对应。因此,考虑到这些谱系之间的古老差异及其明显的形态学差异,我们建议将这三个谱系视为不同的属:Microhylasensu stricto,Glyphoglossus和新近描述的一个属Nanohylagen。十一月 以及基于体积渲染的微型CT扫描对五种物种进行的广义骨科的详细描述,这些物种一共代表了该组中的所有主要血统。结果证实了三个具有高度差异性和良好支撑的进化枝,它们与外部和骨形态学特征以及各自的地理分布相对应。因此,考虑到这些谱系之间的古老差异及其明显的形态学差异,我们建议将这三个谱系视为不同的属:Microhylasensu stricto,Glyphoglossus和新近描述的一个属Nanohylagen。十一月 结果证实了三个具有高度差异性和良好支撑的进化枝,它们与外部和骨形态学特征以及各自的地理分布相对应。因此,考虑到这些谱系之间的古老差异及其明显的形态学差异,我们建议将这三个谱系视为不同的属:Microhylasensu stricto,Glyphoglossus和新近描述的一个属Nanohylagen。十一月 结果证实了三个具有高度差异性和良好支撑的进化枝,它们与外部和骨形态学特征以及各自的地理分布相对应。因此,考虑到这些谱系之间的古老差异及其明显的形态学差异,我们建议将这三个谱系视为不同的属:Microhylasensu stricto,Glyphoglossus和新近描述的一个属Nanohylagen。十一月
更新日期:2021-01-12
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