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产自中国辽宁西部下白垩统热河群的蛙类。

Anurans from the Lower Cretaceous Jehol Group of western Liaoning, China.

机构信息

Key Laboratory of Vertebrate Evolution and Human Origin of Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing, China.

出版信息

PLoS One. 2013 Jul 26;8(7):e69723. doi: 10.1371/journal.pone.0069723. Print 2013.

DOI:10.1371/journal.pone.0069723
PMID:23922783
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC3724893/
Abstract

BACKGROUND

To date, the Lower Cretaceous Jehol Group of western Liaoning, China has yielded five monotypic genera of anurans, including Liaobatrachus grabaui, Callobatrachus sanyanensis, Mesophryne beipiaoensis, Dalianbatrachus mengi, and Yizhoubatrachus macilentus. However, the validity and distinctness of these taxa have been questioned.

METHODOLOGY/PRINCIPAL FINDING: We provide a comprehensive analysis of the Jehol frogs that includes a re-examination of the published taxa as well as an examination of a number of new specimens that have been collected over the past 10 years. The results show that the five previously named taxa can be referred to three species of one genus-Liaobatrachus grabaui, L. beipiaoensis comb. nov. and L. macilentus comb. nov.. The diagnosis of Liaobatrachus is revised, and a new diagnosis is provided for each species of this genus. We also establish Liaobatrachus zhaoi sp. nov., on the basis of a dozen well-preserved specimens from a new locality. This taxon is distinguished by a unique combination of characteristics, including relatively long hind limbs, a rounded rather than triangular acetabulum, and a gradually-tapering cultriform process of the parasphenoid. In addition, an unnamed frog from a higher horizon, which has narrow sacral diapophyses and particularly long legs, is different from Liaobatrachus and represents another form of anuran in the Jehol Biota.

CONCLUSION/SIGNIFICANCE: Comparisons with other Mesozoic and extant anurans and the primary phylogenetic analysis both suggest that Liaobatrachus is a member of the anuran crown-group and forms a polytomy with leiopelmatids (Ascaphus and Leiopelma) and the remaining crown-group anurans (Lalagobatrachia).

摘要

背景

迄今为止，中国辽宁西部的早白垩世热河群已产生了 5 种独有的蛙类属，包括巴氏巧蟾、三燕丽蟾、北票泉蛙、孟氏小鲵和张氏辽蛙。然而，这些分类单元的有效性和独特性一直受到质疑。

方法/主要发现：我们对热河蛙类进行了全面分析，包括对已发表的分类单元进行重新检查，以及对过去 10 年来收集的一些新标本进行检查。结果表明，之前命名的 5 个分类单元可归入一个属的 3 个种，即巴氏巧蟾、北票泉蛙（新组合）和张氏辽蛙（新组合）。我们还修订了巧蟾属的诊断，并为该属的每个种提供了新的诊断。此外，我们基于十几个保存完好的新标本建立了张氏辽蛙的一个新种，即赵氏辽蛙。该种以独特的特征组合为特征，包括相对较长的后肢、圆形而非三角形的髋臼，以及逐渐变细的犁骨棒。此外，来自较高层位的一种未命名的蛙类，具有狭窄的荐椎椎弓突和特别长的腿，与巴氏巧蟾不同，代表热河生物群中另一种蛙类形式。

结论/意义：与其他中生代和现生蛙类的比较以及主要的系统发育分析都表明，巴氏巧蟾是蛙类冠群的一个成员，并与蚓螈目（盘舌蟾科和版纳鱼螈）和剩余的冠群蛙类（细趾蟾类）形成一个并系群。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2fe4/3724893/665b0acd03b0/pone.0069723.g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2fe4/3724893/8c705cc937dc/pone.0069723.g001.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2fe4/3724893/25f02e333555/pone.0069723.g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2fe4/3724893/3974108d1cf2/pone.0069723.g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2fe4/3724893/2eea4adfb9d8/pone.0069723.g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2fe4/3724893/897b5a61740e/pone.0069723.g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2fe4/3724893/049394335d3b/pone.0069723.g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2fe4/3724893/665b0acd03b0/pone.0069723.g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2fe4/3724893/8c705cc937dc/pone.0069723.g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2fe4/3724893/8d3bf7fbdde5/pone.0069723.g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2fe4/3724893/25f02e333555/pone.0069723.g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2fe4/3724893/3974108d1cf2/pone.0069723.g004.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2fe4/3724893/897b5a61740e/pone.0069723.g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2fe4/3724893/049394335d3b/pone.0069723.g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2fe4/3724893/665b0acd03b0/pone.0069723.g008.jpg

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