高黎贡山鼠兔一新种

A NEW SPECIES OF OCHOTONA(OCHOTONIDAE,LAGOMORPHA)FROM MT.GAOLIGONG,NORTHWEST YUNNAN

1985年10月,云南省流行病防治研究所调查队在云南西北部高黎贡山北段的贡山地区相继采到3只体色特殊的鼠兔,经与该属各已知种比较均不同,鉴定为一新种,描述如下.

This paper presents description of a new species of Ochotona,collected from Mt.Gaoligong,Northwest Yunnan.The type specimens are kept in the Control and Research Institute of Epidemic Diseases of Yunnan,Dali.Diagnosis of the new species is given as follows:Ochotona gaoligongensis Wang et Gong,sp.nov.Holotype:No.107,male(ad.),collected on October 16,1985,from Dongsao-fang(27°45/N,,98°278E.),Gongshan Co.,northwest Yunnan,alt.2950m.Paratypes:No.90,female(ad.)and No.87,male(ad.),collected on October 15,1985,from the same locality as the holotype.Diagnosis:The new species is similar to Ochotona forresti in size and main characters of skull,it distingished from latter chiefly by its head and neck brilliant brown rufous,back dull rufous-black|by its flattened skull in profile,nasal bones longer and with broader posterior,and processus condy-laris broader in Mandibula.Remarks:The present new species belongs to subgenus Ochotona by its palatal and incisive foramina completely confluent.The new species is closely similar to O.forresti,by its violion-shaped palatal-incisive foramina,lacking small vacuities at the anterior end of frontals,flattened in profile of skull,size medium and well developed claws,but distinctly differ from other of this subgenus.It is dstingushed from O,forresti by the following points:1.Its head and neck is entirely brilliant brown rufous and forms distinguished colourations with back dull rufous-black,against same colourations of head,neck and back on latter.2.Its back is duller than latter,on O.forresti the back tinged with dull greyish brown,or rufscent brown.3.Its back of ear is black against brown-rufous on latter.4.The juncture of under surface and flank tinged with brown-rufous against absent on latter.5.The skull is lowered and flattened in profile,depth of skull 13.1(12.8-13.8)mm.,against 14.2(13.5-15.0)mm.on latter.6.Nasal bone are relatively longer and with broader posterior than that of latter,nasal length 13.1(12.5-13.8)mm.against 11.9(11.3-12.9)mm.;the width of nasal posterior 5.2(4.9-5.3)mm.against 3.8(3.4-4.6)mm.7.Basal occipital bone is narrower,the width between two bullaes 2.32.8mm.,against 3.4(3.1-4.0)mm.on latter.8.Bullae is relatively larger than that of latter,the length of the bullae 10.1-10.9mm.against 9.3(8.8-10.l)mm.9.Processus condylaris in Mandibula are broader than that of latter,the last width of processus condylaris 5.0-5.8mm.against 4.6(4.1-4.8)mm.In Mt.Gaoligong,new species distribute to same locality with O.forresti and O.thibetana,but it distinctly differ from latter.