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Chuanjiesaurus (Sauropoda) redescribed with new specimen



From: Ben Creisler
bcreisler@gmail.com

A new paper in Memoir of the Fukui Prefectural Dinosaur Museum,  not
yet mentioned yet on the DML. The pdf is free!

http://www.dinosaur.pref.fukui.jp/archive/memoir/memoir010.html



Toru SEKIYA (2011)
RE-EXAMINATION OF CHUANJIESAURUS ANAENSIS (DINOSAURIA: SAUROPODA) FROM
THE MIDDLE JURASSIC CHUANJIE FORMATION,
LUFENG COUNTY,YUNNAN PROVINCE, SOUTHWEST CHINA.
Memoir of the Fukui Prefectural Dinosaur Museum 10 : 1-54 (2011)
http://www.dinosaur.pref.fukui.jp/archive/memoir/memoir010-001.pdf

ABSTRACT
The present study re-evaluates Chuanjiesaurus anaensis Fang et al.,
2000 from the Middle Jurassic of Lufeng,Yunnan, Southwest China. The
holotype and a new referred specimen are described in detail, and
re-examined osteologically and phylogenetically. In this report, the
author proposes several emended diagnoses based on close observations
and comparisons of the specimens. Some osteological features reveal
that Chuanjiesaurus belongs to Mamenchisauridae. Compared to other
mamenchisaurid dinosaurs, C. anaensis possesses relatively primitive
characters. The phylogenetic position of C. anaensis was determined
according to the present analysis. In addition,the data sets of some
taxa of Mamenchisauridae from southwestern China are modified in the
present research. The present analysis reveals that C. anaensis,
Mamenchisaurus, Tienshanosaurus and Yuanmousaurus constitute a
monophyletic group that belongs to relatively derived Eusauropoda.
This suggests that Mamenchisauridae could be positioned at a more
derived part of Eusauropoda than previously thought. This study
confirms that C. anaensis is a member of Mamenchisauridae.