Vertebrata Palasiatica ›› 2005, Vol. 43 ›› Issue (04): 312-324.
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PENG Guangzhao, SHU Chunkang
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彭光照, 舒纯康
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 margm 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 having an angular anterolateral comer; 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.
摘要: 记述了四川省自贡市汇东新区自贡市乳品厂发现的西蜀鳄一新种——周氏西蜀鳄(Hsisosuchus chowi sp.nov.)。新种区别于西蜀鳄已知种的特征是:鼻骨后部沿缝合线有一浅的纵凹,额骨的眶缘向上凸起成嵴,沿额骨缝合线也隆起成一微弱的纵嵴,上颞窝的内侧缘向上凸起呈明显的嵴,顶骨具一前中突,侧视颧骨腹缘呈明显的波曲状,眶后骨前侧角约90°,鳞骨后侧突特别拉长,向侧下后方伸展,使鳞骨侧缘明显向内侧弓曲,左右外枕骨的枕髁部分不相接,翼骨的腹中嵴源于翼骨主体部分,内鼻孔位置比较靠前。此外,齿骨外面和
PENG Guangzhao, SHU Chunkang. A NEW SPECIES OF HSISOSUCHUS FROM THE LATE JURASSIC OF ZIGONG, SICHUAN, CHINA. Vertebrata Palasiatica, 2005, 43(04): 312-324.
彭光照, 舒纯康. 2005, 43(04): 312-324, 四川自贡晚侏罗世西蜀鳄一新种. 古脊椎动物学报.
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https://www.vertpala.ac.cn/EN/Y2005/V43/I04/312