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New Therizinosauroid paper



New from the Canadian Journal of Earth Sciences (in the advanced issue
section) is a paper on a new find of Suzhousaurus.

Da-qing Li, Hai-lu You, and Jian-ping Zhang (2008). A new specimen of
Suzhousaurus megatherioides (Dinosauria: Therizinosauroidea) from the Early
Cretaceous of northwestern China. Can. J. Earth Sci. 45(7): 769-779 

Abstract: A new specimen of a therizinosauroid dinosaur recovered from the
Lower Cretaceous Xinminpu Group in the Yujingzi Basin of the Jiuquan area,
Gansu Province, northwestern China, consists of a partial postcranial
skeleton, including a well-preserved left half of the pelvic girdle. It is
referred to Suzhousaurus megatherioides Li et al., 2007 based on the
autapomorphic anterior concavity of its pubic shaft and is the second known
specimen of this taxon. Comparisons of the structure of therizinosauroid
pelvic girdles show that the pelvis of Suzhousaurus possesses several unique
features, including a laterally deflected, thin, and flat preacetabular
process of the ilium, a smoothly curved anterodorsal margin of the
preacetabular process of the ilium, and a concave anterior margin of the
pubic shaft. Cladistic analysis confirms that Suzhousaurus is more derived
than the Early Cretaceous therizinosauroids Falcarius and Beipiaosaurus,
less derived than Late Cretaceous forms, and likely closely related to
Alxasaurus from the Early Cretaceous of Inner Mongolia, China.

Darryl Jones  <dinoguy@sympatico.ca>

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visit my web page at:

http://www3.sympatico.ca/dinoguy/