中国四川省蛙科一新种——南江臭蛙(两栖纲:无尾目)

A New Ranidae Frog Species from Sichuan, China──Odorrana (Odorrana) nanjiangensis (Ranidae : Anura)

对分布于四川、重庆市、贵州、湖北、湖南、安徽和福建的花臭蛙[Odorrana(Odorrana)schmackeri(Boettger,1892)]标本进行了形态比较,结果发现四川省南江和万源县的花臭蛙标本与其他产地的花臭蛙标本在形态特征上存在明显区别,主要是:1)成体雄雌体长之比值较小,约为1∶1.34;2)犁骨齿列短,两内侧间距宽,距内鼻孔远;3)背面深色斑点周围无浅色边缘;4)股后部深色斑大而稀疏;5)趾间蹼较弱,第四趾蹼达远端关节下瘤;6)腹内成熟卵的动植物极均为乳白色。故将四川省南江和万源的标本订为新种--南江臭蛙[Odorrana(Odorrana)nanjiangensis,sp.nov.]。

A new odor frog Odorrana （Odorrana） nanjiangensis sp. nov. （Holotype： CIB610623, adult male, SVL 59.6 mm） has been recognized based on the collections from Nanjiang County, Sichuan Province in China, which was previously recognized as O. schmackeri. This new species can be distinguished from the latter by the combination of the following characteristics： （1） the sexual dimorphism ratio is smaller in size between males and females of O. nanjiangensis; 1 ： 1.34 （male to female）, males＇ mean SVL 55.6 mm, females＇ mean SVL 74.6 mm, compared to the ratio of males （mean SVL 44.6 mm） to females （mean SVL 80.0 mm） of O. schmackeri is 1 ： 1.93, （2） vomerine teeth have two short series in O. nanjiangensis, compared to two long series in O. schmackeri; （3） dark spots present on green body back and have no light edge on O. nanjiangensis, while light-edged compared to dark spots with light edge on O. schmackeri; （4） rear of the thigh of O. nanjiangensis has large, scattered dark brown markings, compared to the rear of the thigh of O. schmackeri has small, densely marbled or spotted, dark brown markings; （5） webs of toes are rather small, web on fourth toe reaches distal sub-articulate tubercle of O. nanjiangensis, compared to the webs on the toes of O. schmackeri, which reaches the disc of the toe; （6） eggs of O. nanjiangensis are creamy white without pigment, whereas the eggs of O. schmackeri are pigmented and the animal pole is brown in color.