贵州高原6种掌突蟾形态特征差异分析  

Analysis on Morphological Characteristics of Six Species of Leptobrachella in Guizhou Plateau

作　　者：沈拓 李仕泽 刘京 魏刚[3] 穆浪 粟海军[1] SHEN Tuo;LI Shi-Ze;LIU Jing;WEI Gang;MU Lang;SU Hai-Jun(College of Forestry,Guizhou University,Biodiversity and Nature Conservation Research Center,Guizhou University,Guiyang 550025,China;College of Animal Science,Guizhou University,Guiyang 550025,China;Guiyang College,Guiyang 550002,China)

机构地区：[1]贵州大学林学院,贵州大学生物多样性与自然保护研究中心,贵阳550025 [2]贵州大学动物科学学院,贵阳550025 [3]贵阳学院,贵阳50001

出　　处：《动物学杂志》2022年第1期49-68,共20页Chinese Journal of Zoology

基　　金：贵州省科技支撑项目(黔科合支撑[2020]4Y029);国家自然科学基金项目(No.3196099);贵州省科技厅青年人才成长项目(黔教合KY字[2018]455;黔教合KY字[2018]468);贵州省基础研究项目(黔科合基础[2020]1Y083);贵州省林业科研项目(黔林科合[2020]13号)。

摘　　要：本文通过形态指标测量,比较了分布于贵州高原的6种掌突蟾属(Leptobrachella)物种的形态特征差异。结果显示,头体长比较,6种掌突蟾的头体长从大到小依次为赤水掌突蟾(L.chishiensis).绥阳掌突蟾(L.suiyangensis)、金沙掌突蟾(L.jinshaensis)、毕节掌突蟾(L.biie)、武陵掌突蟾(L.wulingensis)、紫腹掌突蟾(L.purpuraventra);聚类分析显示,在6个物种中,紫腹掌突蟾与毕节掌突蟾差异最大,与赤水掌突蟾差异最小:6种掌突蟾的差异主要表现在吻长/头体长、鼻间距/头体长、上眼睑宽/头体长、胫宽/头体长、后肢长/头体长和第4指长/头体长这6项比值性状上,形态特征判别准确率为75.0%~100.0%,综合判别准确率为90.0%。此外,本研究还对6种掌突蟾的质量特征进行了比较。综合形态测量特征,本研究初步揭示了贵州高原这6种掌突蟾的形态特征差异,为后续掌突蟾属的分类学及谱系地理学研究提供了一定基础。[Objectives]In order to reveal the differences in the main morphological characteristics of the Leptobrachella,it is hoped to provide a reference for the subsequent taxonomy and pedigree geography of Leptobrachella.[Methods]Apply morphological analysis methods,use the shortest distance method of Euclidean distance for cluster analysis,construct a cluster tree to show the grouping relationship of six species.The stepwise discriminant method is used for discriminant analysis,the trait parameters that contribute greatly to the discrimination are selected,and the discriminant formulas of six species of Leptobrachella are established.The morphological characteristic values of the individuals to be determined are respectively substituted into the discriminant formulas,and the formula values are calculated and compared.The largest is the population to which the individual of Leptobrachella belongs,so as to verify the ability of each main deformation contribution trait to distinguish species.[Results]The results indicated that:Morphological character Snout-vent length comparison:From large to small,the snout-vent length of the six species of Leptobrachella are L.chishuiensis,L.suiyangensis,L.jinshaensis,L.bijie,L.wulingensis and L.purpuraventra(Table 3);Cluster analysis showed that among the 6 species,the difference between the L.purpuraventra and the L.bijie was the largest,and the L.purpuraventra and the L.chishuiensis had the smallest difference(Fig.2);The difference of six species of Leptobrachella mainly focused on the ratio of snout length/snout-vent length,intemasal distance/snout-vent length,upper eyelid width/snout-vent length,maximal tibia width/snout-vent length,hindlimb length/snout-vent length,fourth finger length/snout-vent length(Fig.4).The accuracy rate of morphological feature discrimination was 75.0%-100.0%,and the comprehensive discrimination accuracy rate was 90.0%.In addition,we also compared the quality characteristics of six species of Leptobrachella(Table 4),and found that they can also be disting

关 键 词：掌突蟾属 形态特征差异:贵州高原 

分 类 号：Q959[生物学—动物学]