Postcranial Anatomy of the Mesozoic Dalinghosaurus (Squamata): Evidence from a New Specimen of Western Liaoning  

作　　者：JIShu＇an JIQiang 

机构地区：[1]SchoolofEarthandSpaceSciences,PekingUniversity,Beijing100871 [2]InstituteofGeology,ChineseAcademyofGeologicalSciences,Beijing100037

出　　处：《Acta Geologica Sinica(English Edition)》2004年第4期897-906,共10页地质学报（英文版）

基　　金：This research is supported financially by the"Tenth Five-Year"Special Foundation under the Ministry of Land and Resources to Ji Qiang,the National Natural Science Foundation of China(40272008)to Ji Shu'an,and the Fund for Young Geologist of the former Ministry of Geology and Mineral Resources(Qn979827)to Ji Shui'an.

摘　　要：The postcranial skeleton of a new specimen of the long-tailed lizard Dalinghosaurus longidigitus was excavated from the Yixian Formation in Lingyuan, western Liaoning. The new specimen provides more anatomical information about this species, especially about the anterior dorsal vertebrae, shoulder girdle and forelimbs. This lizard can be included within the clade Scleroglossa by its 27 or more presacrals, moderately long pubis, and gently notched distal end of tibia. But the detailed systematic position for this taxon remains undetermined. The features of the much longer hind limbs and pes compared with forelimbs and manus, metatarsal Ⅳ longer than Ⅲ, pedal phalanges robust, and penultimate phalanx not longer than other phalanges etc. suggest that this lizard was a running and ground swelling animal.The postcranial skeleton of a new specimen of the long-tailed lizard Dalinghosaurus longidigitus was excavated from the Yixian Formation in Lingyuan, western Liaoning. The new specimen provides more anatomical information about this species, especially about the anterior dorsal vertebrae, shoulder girdle and forelimbs. This lizard can be included within the clade Scleroglossa by its 27 or more presacrals, moderately long pubis, and gently notched distal end of tibia. But the detailed systematic position for this taxon remains undetermined. The features of the much longer hind limbs and pes compared with forelimbs and manus, metatarsal Ⅳ longer than Ⅲ, pedal phalanges robust, and penultimate phalanx not longer than other phalanges etc. suggest that this lizard was a running and ground swelling animal.

关 键 词：Dalinghosaurus ANATOMY PHYLOGENY Yixian Formation western Liaomng 

分 类 号：Q915.2[天文地球—古生物学与地层学] P534.4[生物学—古生物学]