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记述产自辽宁西部凌源大王杖子义县组的一件多瘤齿兽类骨架,是早白垩世保存齿列和四肢信息最多的标本.据此建立凌源中国俊兽（新属、新种）Sinobaatar lingyuanensis gen.et sp.nov.新属种头骨狭窄,形态原始,无眶上脊和眶后突.齿式为3·?·5·2/1·0·3·2,齿列形态,特别是颊齿与始俊兽属相似,应属于始俊兽科.头后骨骼基本形态与其他多瘤齿兽类一致.第V（足庶）骨只与骰骨相关节,不与跟骨接触,可能代表了多瘤齿兽类的原始形态,并与全兽类形态接近.9块腕骨,与全兽类中的张和兽形态相近,但中央骨大于小多角骨.多瘤齿兽类的齿列演化阶段性明显,中国俊兽的齿列特征介于晚侏罗世与晚白垩世的类型之间,而且已知始俊兽类仅发现于早白垩世,因此,新属种的发现表明热河生物群时代更可能为早白垩世.
A polygregate mammalian skeleton from Lingdian Wangzizi and Ziyi formations in western Liaoning is described, which is the most pre-preserved specimen of dentition and limbs in Early Cretaceous.According to this, The new species is of narrow skull shape, primitive morphology, no supraorbital and orbital procession. The tooth style is 3 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · , Especially the cheek tooth is similar to the beginning of Jun animal, should belong to the beginning of Jun animals .Basic head skeleton and the basic morphology of other polygamous beast consistent .V (foot Shu) only with the cuboid bone joints, not with the Bone contact may represent the original form of polygamous mammals and is close to that of the whole mammals.9 carpal bones, similar in shape to the beasts and animals of the whole mammals, but with central bony greater than small polygonal bones. The stage of evolution of the dentition of mammals is obvious. The dentition features of the Chinese chengdu range from Late Jurassic to Late Cretaceous, and it is known that the Shichun mammals were only found in the Early Cretaceous. Therefore, The findings suggest that the Jehol Biota was more likely to be Early Cretaceous.