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STRATIGRAPHY OF THE MAMENCHISAURUS FAUNA IN JINGYAN, SICHUAN

ZHANG Yu-guang and LI Jian-jun (Beijing Natural History Museum, Beijing, 100050)  
The Jurassic strata in Jingyan of Sichuan containing the Mamenchinsaurus fauna are dealt with and divided in this paper. The Mamenchisaurus fossils contained there are compared in morphological features and stratigraphically with other types of the genus on by one. The comprehensive analysis show that the Mamenchisaurus fauna of Jingyan appeared in the early Late Jurassic and is primitive in morphology. The results of the morphological identification and stratigraphical study agree with each other. Their evolutionary processes in different apoches of the Late Jurassic also made clear.
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