古脊椎动物学报2005，Vol.43Issue(4)：312-324,13.
四川自贡晚侏罗世西蜀鳄一新种
A NEW SPECIES OF HSISOSUCHUS FROM THE LATE JURASSIC OF ZIGONG, SICHUAN, CHINA
摘要
Abstract
A crocodyliform specimen collected from the Late Jurassic Shangshaximiao Formation,Zigong, Sichuan Basin, China comprises a nearly complete skull, mandibles, most vertebrae, partial pectoral and pelvic girdles, most forelimbs and osteoderms. It represents a new species of Hsisosuchus, H. chowi sp. nov. Diagnostic features of the new species include a shallow longitudinal depression between nasals; a ridge along orbital margin of frontal; a faint ridge along suture between frontals; a distinct ridge along medial margin of supratemporal fossa; an anteromedian process of parietal wedging between posterior processes of frontals; ventral margin of jugal distinctly waved in lateral view; postorbital haying an angular anterolateral corner; posterolateral process of squamosal extraordinarily elongated and extending outwards, downwards and backwards, leading to lateral margin of squamosal distinctly arched medially; exoccipital not contacting its opposite on occipital condyle; a ventral median ridge of pterygoid originated from main body of pterygoid; and choana positioned anteriorly. The discovery of H. chowi increases not only the distribution but also the understanding of the specialized hsisosuchids.关键词
四川自贡/晚侏罗世/上沙溪庙组/西蜀鳄Key words
Zigong/Sichuan/Late Jurassic/Shangshaximiao Formation/Hsisosuchus分类
生物科学引用本文复制引用
彭光照,舒纯康..四川自贡晚侏罗世西蜀鳄一新种[J].古脊椎动物学报,2005,43(4):312-324,13.基金项目
自贡恐龙博物馆馆长基金项目(编号:2003-F01)资助. （编号:2003-F01）
