大巴山区锄足蟾科齿蟾属一新种——南江齿蟾的描述(两栖纲:无尾目)  

DESCRIPTION OF A NEW PELOBATID TOAD OF GENUS OREOLALAX OREOLALAX NANJIANGENSIS FROM DABA MOUNTAIN REGION OF CHINA

作　　者：费梁[1] 叶昌媛[1] 李成[1] 

机构地区：[1]中国科学院成都生物研究所

出　　处：《动物分类学报》1999年第1期107-113,共7页Acta Zootaxonomica Sinica

基　　金：国家自然科学基金;中国科学院生物分类区系特别支持经费;成都生物所地奥科学基金

摘　　要：对大巴山区四川南江的一种齿蟾标本作了深入研究，认为与我国已知齿蟾属Ｏｒｅｏｌａｌａｘ物种均不相同，其形态特征与宝兴齿蟾Ｏ．ｐｏｐｅｉＬｉｕ，１９４７相近，但又有明显区别，南江标本曾在胡淑琴（１９６６）一文中被归入浦氏短齿蟾ＳｃｕｔｉｇｅｒｐｏｐｅｉＬｉｕ（即宝兴齿蟾Ｏｒｅｏｌａｌａｘｐｏｐｅｉ）。现经过详细的形态学比较和数值分类学的典型判别分析研究。被确定为新种，即命名为南江齿蟾Ｏｒｅｏｌａｌａｘｎａｎｊｉａｎｇｅｎｓｉｓｓｐ．ｎｏｖ．。Oreolalax nanjiangensis Fei et Ye, sp.nov. (Fig.1) Holotype CIB No. 610544,adult male, snout to vent 58.8mm ; type locality: Mt.Guangwu, Nanjiang Co.(32°35′ N,106°45′E), Sichuan Prov., 1600m ; July 20,1961, collected by YE ChangYuan. Paratypes 10 males(CIB610479,610481,610492,610494,610496,610498,610527,610545,610547,610549),8 females(CIB610491,610495,610497,610499,610526,610543,610546,610548),4 juveniles and tadpoles of different developmental stages including metamorphosed individuals; collected from the same locality as that of holotype, altitude 16001850m ; July 1827,1961. Diagnosis. Oreolalax nanjiangensis is closely related to O. popei in secondary sex characters but differs from the latter in the following features: 1) without dark marbling or spots on the throat, belly and vertral sides of the limbs and rear of the thigh; 2) round warts on the dorsal side of the thigh and tibia nearly equal to ones on the back of the body in size; 3) smaller in size, mature males and females measure snoutvent 52.660(mean 56.9±2.25, N=10) mm; 53.358.2(mean 57.4±1.84, N=8) mm; respectively. Description of types.Snout to vent length mean 57mm in the adult, body flattened; head slightly longer than broad; snout rounded and projecting beyond lower lip; canthus rostralis inconspicuous; nostril about midway between the tip of the snout and the anterior corner of the eye; tympanum hidden under skin; loreal region very oblique, concave; maxillary teeth developed; no vomerine teeth; tongue deeply nicked behind; opening Eustachian tube very large; eye large, pupil vertical. Forelimb shorter, the length of lower arm and hand less than half of the body length; tip of finger rounded, whitish; the first and second finger about equal in length, shorter than the fourth; subarticular tubercles indistinct; ventral side of the third and fourth fingers skin ridge shaped; palmer tubercles rounded, inner one larger than the outer one . Hind limb slender and long, the tibiotarsal articu

关 键 词：两栖纲 无尾目 锄足蟾科 齿蟾属 南江齿蟾 新种 

分 类 号：Q959.53[生物学—动物学]