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Integrative taxonomy helps to reveal the mask of the genus Gynandropaa (Amphibia: Anura: Dicroglossidae)

Integrative Zoology 2016年第2期11卷 134-150页

作者： Yan HUANG Junhua HU Bin WANG Zhaobin SONG Caiquan ZHOU jianping jiang Chengdu Institute of Biology Chinese Academy of SciencesChengduChina College of Life Science Sichuan UniversityChengduChina University of Chinese Academy of Sciences BeijingChina Key Laboratory of Southwest China Wildlife Resources Conservation China West Normal UniversityMinistry of EducationNanchongChina

Species of the genus Gynandropaa within the family Dicroglossidae are typical spiny frogs whose taxonomic status has long been in *** used integrative methods,involving morphological and molecular analyses,to elucidate the phylogenetic relationships,and to determine identities and the geographic distribution of each valid *** obtained DNA sequence data of 5 species of Gynandropaa(complete sequences of the mitochondrial NADH dehydrogenase subunit 2[ND2]gene,and 890 bp of 12S rRNA and 16S rRNA partial sequences)from 37 localities(including the topotypes of 5 described species)and constructed Bayesian and maximum-likelihood trees to examine the patterns of phylogeography.A total of 28 morphological variables were taken on 624 *** clades with clear geographic patterns were recognized:clade C(from south-western Sichuan Province and central Yunnan Province),clade E(western Guizhou Province and eastern to central Yunnan Province)and clade W(western to southern Yunnan Province).Integrating morphological characteristics and distribution information,the clades W,E and C represent Gynandropaa yunnanensis,*** and ***chuanensis,*** draw the following conclusions:(i)the taxon ***,formerly evaluated as a junior synonym of ***,is revalidated herein at the rank of species;(ii)*** is a junior synonym of ***;and(iii)*** is a valid species while *** is probably a subspecies of ***,with the distribution range from Vietnam to southern Yunnan *** study clears up the taxonomic status of Gynandropaa and provides important information for understanding the evolution and conservation of these spiny frogs.

关键词： amphibians morphological traits spiny frogs mitochondrial DNA systematics

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A New Species of Genus Microhyla(Amphibia： Anura： Microhylidae) from Zhejiang Province, China

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Asian Herpetological Research 2018年第3期9卷 135-148页

作者： Meihua ZHANG Liang FEI Changyuan YE Yufan WANG Bin Wang jianping jiang CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization and Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province Chengdu Institute of Biology Chinese Academy of Sciences Chengdu 610041 China University of Chinese Academy of Sciences Beijing 100049 China Zhejiang Forest Resource Monitoring Center Hangzhou 310020 China

We described a new species, Microhyla beilunensis sp. nov., from Zhejiang Province of China. Phylogenetic analyses based on the mitochondrial 12 S, 16 S and CO1 gene sequences suggested that the new taxon was distinctly separated from its congeners and closed to M. mixtura and M. okinavensis. Morphologically, the new species could be identified from its congeners except M. mixtura by several characters：（1） rudimentary webs on toe base;（2） absence of disks and dorsal median longitudinal grooves on finger tips;（3） presence of disks and dorsal median longitudinal grooves on toe tips. As well, the new species could be identified from topotype M. mixtura by the combination of characters：（1） apart from the stripes, bar-shaped and oval-shaped patterns, the rounded spots present on the dorsum of body and legs;（2） the outer metacarpal tubercles prominently larger than the inner one;（3） of males, the ratios of HW, IND, UEW and LAW to SVL of the new species were significantly larger than those of M. mixtura（P 〈 0.01）, and the ratios of SL, IOD, LAHL, HLL, TL, TFL and FL to SVL of the new species were significantly less than those of M. mixtura（P 〈 0.05）.

关键词： Microhyla morphological comparison new species phylogenetic analysis taxonomy Zhejiang

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A New Species of the Asian Toad Genus Megophrys sensu lato(Amphibia: Anura: Megophryidae) from Guizhou Province, China

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Asian Herpetological Research 2018年第4期9卷 224-239页

作者： Shize LI Ning XU Jing LIU jianping jiang Gang WEI Bin WANG Department of Food Science and Engineering Maotai University CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization and Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province Chengdu Institute of Biology (CIB) Chinese Academy of Sciences (CAS) Biodiversity Conservation Key Laboratory Guiyang College

We describe a new species of the genus Megophrys sensu lato from Guizhou Province, China. Molecular phylogenetic analyses based on mitochondrial DNA and nuclear DNA sequences all strongly supported the new species as an independent lineage in Megophrys(Panophrys) clade. The new species is distinguished from its congeners by a combination of the following morphological characteristics:(1) small body size with SVL < 38.8 mm in male and SVL < 42.3 mm in female;(2) vomerine teeth absent;(3) tongue not notched behind;(4) a small horn-like tubercle at the edge of each upper eyelid;(5) tympanum distinctly visible, rounded;(6) two metacarpal tubercles in hand;(7) relative finger lengths: II < I < V < III;(8) toes with rudimentary webbing at bases;(9) heels overlapping when thighs are positioned at right angles to the body;(10) tibiotarsal articulation reaching the level between tympanum to eye when leg stretched forward;(11) an internal single subgular vocal sac in male;(12) in breeding male, the nuptial pads with black nuptial spines on the dorsal bases of the first and second fingers.

关键词： Megophrys sensu lato new species taxonomy phylogenetic analysis Guizhou Province China

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Description of a New Species of Amolops Cope, 1865(Amphibia: Ranidae) from Nepal and Nomenclatural Validation of Amolops nepalicus Yang, 1991

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Asian Herpetological Research 2020年第2期11卷 71-94页

作者： Janak Raj KHATIWADA Guocheng SHU Bin WANG Tian ZHAO Feng XIE jianping jiang CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization&Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province Chengdu Institute of BiologyChinese Academy of SciencesChengdu 610041China

A new species,Amolops mahabharatensis ***.,is described from Mahabharat range(middle mountain)of *** new species is a member of the *** group and is distinguished from its congeners using morphological and molecular *** new species is diagnosed by having numerous warts on dorsum and flanks,dorsal body greyish olivebrown/light brown,presence of vomerine teeth series,presence of a pair of subgular vocal sacs in males and tadpole withⅢ:5+5/1+1:Ⅱ–labial tooth *** addition,evidenced by the phylogenetic and morphological analyses in this study,Amolops nepalicus is shown to be a valid species.A molecular phylogenetic analysis based on 16 S ribosomal gene for six members of the *** group suggested that the new species is sister to a clade containing *** and *** uncorrected genetic divergences between the new species and its closest congeners ***,*** and *** based on 16 S rRNA gene were 10.5%,11.6%,and 8.6%*** new species showed wide distribution in the Mahabharat range of Nepal.

关键词： A.marmoratus group mahabharat range molecular phylogeny taxonomy

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A Rapid, Non-invasive Method for Anatomical Observations of Tadpole Vertebrae in Vivo

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Asian Herpetological Research 2018年第2期9卷 99-109页

作者： Guocheng SHU Shan XIONG Wenyan ZHANG jianping jiang Cheng LI Feng XIE Chengdu Institute of Biology Chinese Academy of Sciences Chengdu 610041 China University of Chinese Academy of Sciences Beijing 100049 China

The tadpole is a critical stage in the amphibian life cycle and plays an important role during the transition from the aquatic to the terrestrial stage. However, there is a large gap in tadpole research, which represents a vital component of our understanding of the diversity and complexity of the life history traits of amphibians, especially their developmental biology. Some aspects of this gap are due to limited research approaches. To date, X-ray microcomputed tomography （micro-CT） has been widely used to conduct osteology research in adult amphibians and reptiles, but little is known about whether this tool can be applied in tadpole studies. Thus, we compared the results of two methods （the bone-cartilage double-staining technique and micro-CT） to study vertebrae in tadpole specimens. The results revealed no significant difference between the two methods in determining the number of vertebrae, and micro-CT represents a rapid, non-invasive, reliable method of studying tadpole vertebrae. When scanning tadpoles, voltage is the most critical of the scanning parameters （voltage, current and scan time）, and moderate scanning parameters are recommended. In addition, micro-CT performed better using specimens stored in 70% ethanol than those preserved in 10% formalin. Finally, we suggest that micro-CT should be more widely applied in herpetological research to increase specimen utilization.

关键词： micro-CT bone-cartilage double-stain tadpole vertebrae

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Age Structure of Females in a Breeding Population of Echinotriton chinhaiensis(Caudata:Salamandridae) and Its Conservation Implication

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Asian Herpetological Research 2011年第2期2卷 91-96页

作者： Weizhao YANG Chang LIU jianping jiang Cheng LI Feng XIE Chengdu Institute of Biology Chinese Academy of Sciences The Graduate University of Chinese Academy of Sciences

Knowledge of life history is important for understanding possible connections to population declines. Here, we investigated the female age structure and fecundity of Echinotriton chinhaiensis, one of the most endangered salamanders in the world, using skeletochronology based on specimens collected in 2008 and 2009 from a population in Ruiyansi, northeast of Ningbo, Zhejiang, China. The results showed that most female salamanders were between 5 and 6 years of age, with the minimal reproductive age, predicted to be 3 years, and the clutch size correlated to the body size. We argue that both delayed attainment of sexual maturity and low fecundity make this species more vulnerable to extinction.

关键词： skeletochronology age structure sexual maturity fecundity clutch size

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Ambient temperature alters body size and gut microbiota of Xenopus tropicalis

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Science China(Life Sciences) 2020年第6期63卷 915-925页

作者： Jiaying Li Junpeng Rui Yulong Li Na Tang Songping Zhan jianping jiang Xiangzhen Li Key Laboratory of Environmental and Applied Microbiology Chinese Academy of SciencesEnvironmental Microbiology Key Laboratory of Sichuan ProvinceChengdu Institute of BiologyChinese Academy of SciencesChengdu 610041China University of Chinese Academy of Sciences Bejing 100049China Department of Herpetology Chengdu Institute of BiologyChinese Academy of SciencesChengdu 610041China

Temperature is important to determine physiological status of ectotherms. However, it is still not fully understood how amphibians and their symbiotic microbiota acclimate to ambient temperature. In this study, we investigated the changes of gut microbiota of Xenopus tropicalis at different temperatures under controlled laboratory conditions. The results showed that microbial communities were distinct and shared only a small overlap among froglet guts, culture water and food ***, the dominant taxa harbored in the gut exhibited low relative abundance in water and food. It indicates that bacterial taxa selected by amphibian gut were generally of low abundance in the external environment. Temperature could affect betadiversity of gut microbiota in terms of phylogenetic distance, but it did not affect alpha diversity. The composition of gut microbiota was similar in warm and cool treatments. However, signature taxa in different temperature environments were identified. The relationships between temperature, gut microbiota and morphology traits of X. tropicalis revealed in this study help us to predict the consequences of environmental changes on ectothermic animals.

关键词： gut microbiota Xenopus tropicalis temperature body size thermal adaptation

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飞轮微振动的准零刚度多向隔振方法

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振动与冲击 2022年第2期41卷 123-129页

作者：余松黄可凡蒋建平中山大学航空航天学院广东深圳518107

针对航天器飞轮微振动的低频隔振难题,提出了基于准零刚度机理的多自由度非线性隔振方法。建立基于准零刚度支杆的Stewart隔振平台的动力学模型,通过增量谐波平衡(incremental harmonic balance,IHB)法分析了支杆刚度、激励力和力矩幅... 详细信息

针对航天器飞轮微振动的低频隔振难题,提出了基于准零刚度机理的多自由度非线性隔振方法。建立基于准零刚度支杆的Stewart隔振平台的动力学模型,通过增量谐波平衡(incremental harmonic balance,IHB)法分析了支杆刚度、激励力和力矩幅值对隔振性能的影响。在四自由度飞轮线性扰动模型的基础上,建立飞轮和隔振平台的耦合动力学模型,并用数值仿真分析了隔振效果。结果表明:该隔振方法能避免传统线性隔振在低频处的扰动放大现象,提升低频隔振性能,实现飞轮的全转速隔振,并且飞轮角位移响应幅值能满足动量矩矢量的指向精度要求。

关键词：飞轮微振动非线性隔振准零刚度六自由度隔振平台增量谐波平衡(IHB)法

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Microhabitat Segregation of Parapatric Frogs in the Qinling Mountains

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Asian Herpetological Research 2019年第1期10卷 48-55页

作者： Shengnan YANG jianping jiang Zhenhua LUO Xin YANG Xiaoyi WANG Wenbo LIAO Junhua HU Chengdu Institute of Biology Chinese Academy of Sciences Key Laboratory of Southwest China Wildlife Resources Conservation (Ministry of Education) China West Normal University School of Life Sciences Central China Normal University

Coexistence mechanisms for species with similar ecological traits and overlapping geographic distributions are basic questions in ecology and evolutionary biology. Specific habitat requirements often limit distribution range as well as facilitate partitioning resource utilization in ecological similar species. Understanding niche segregation and differences in microhabitat utilization can contribute to identifying coexistence mechanisms between parapatric species. Feirana quadranus and F. taihangnica are two closely related frog species with parapatric geographic ranges and an elongated contact zone within the Qinling Mountains, which is an important watershed for East Asia. Here, we analysed the difference in microhabitat utilization between the two frog species and explored the key ecological factors that induced their microhabitat differentiation based on quadrats sampled in the contact zone. Our comparison of twenty environmental variables showed that both species used microhabitats with alkalescent warm water and gentle slope conditions. The principal component analysis indicated that climate-related variables, vegetation conditions, and river width were the important factors for microhabitat utilization of these species. These findings contribute to our understanding on the coexistence mechanisms of these two related and parapatric Asian mountain frog species. This study can also be helpful for identifying target habitats to conduct conservation actions and management strategies effectively in the face of environmental changes.

关键词： coexistence contact zone microhabitat utilization niche segregation Feirana Qinling Mountains

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Leptobrachium bompu(Amphibia,Anura,Megophryidae)Discovered in Upper Medog,Tibet,China with Descriptions of its Tadpoles,Advertisement Calls and Systematic Position

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Asian Herpetological Research 2017年第2期18卷 137-146页

作者： Xixi LIANG Wulin LIU Bin WANG Li DING Jianpu WU Feng XIE jianping jiang Chengdu Institute of Biology Chinese Academy of SciencesChengdu 610041SichuanChina University of Chinese Academy of Sciences Beijing 100049China Institute of Forestry Survey Plan and Research of Xizang Autonomous RegionLhasa 850000TibetChina

Leptobrachium bompu Sondhi and Ohler, 2011 was described based on a single specimen collected from Eaglenest in southern slope of Himalaya（holotype： No. KA0001/200905）. In April, 2014, seven adults and three tadpoles of Leptobrachium bompu were collected from upper Medog, Tibet, China since most the morphological characters of the adult frogs matched the species Leptobrachium bompu, while the tadpoles mentioned above were determined as the same species as the adults by molecular systematics analysis. Three types of iris coloration were found in the seven adult specimens and two types of spiraculum in the three tadpoles. Advertisement calls usually had 6-8 notes and the fundamental frequency ranged from 1076 to 1466 Hz. All the specimens collected at upper Medog were clustered as one lineage with very low genetic variation and located at the base of the phylogenetic tree of the genus Leptobrachium.

关键词： acoustics morphology molecular systematics Leptobrachium bompu megophryidae Medog Tibet

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