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Re: Yizhousaurus, new early Chinese sauropod from complete skeleton



Read '*Yizhousaurus sunae*, a new nomen nudum from China'.

Cheers,
Jocelyn

Le 28/10/2010 00:18, bh480@scn.org a écrit :
From: Ben Creisler
bh480@scn.org

In case this news story and abstract have not been
mentioned yet:

http://news.discovery.com/dinosaurs/sauropod-dinosaurs-
skeleton.html
(with photo of complete skull)

This conference abstract is also posted online with
permission to distribute:
http://gsa.confex.com/gsa/2010AM/finalprogram/abstract_175
675.htm

CHATTERJEE, Sankar, WANG, T., PAN, S.G., DONG, Z., WU,
X.C., and UPCHURCH, P. (2010)

A COMPLETE SKELETON OF A BASAL SAUROPOD DINOSAUR FROM THE
EARLY JURASSIC OF CHINA AND THE ORIGIN OF SAUROPODA.

Sauropods were very successful group of herbivorous
dinosaurs in terrestrial ecosystems, but their early
evolution is poorly understood because of a highly
incomplete fossil record. Characterizing the evolutionary
history of early sauropods is central to understanding
their rise and diversification in the Jurassic and
Cretaceous. Here we report the discovery of a nearly
complete and exquisitely preserved skeleton of a basal
sauropod from the Lower Lufeng Formation (Early Jurassic)
in Yunnan, China that fills a critical gap in the early
evolution of sauropod dinosaurs. The new taxon,
Yizhousaurus sunae gen. et sp. nov., is the most complete
basal sauropod currently known with intact skull; it is
an important transitional fossil documenting the
evolution of sauropods from prosauropods. The skull of
Yizhousaurus is particularly significant because basal
sauropods are diagnosed solely on the basis of
fragmentary postcranial material. The new material
reveals a mosaic of plesiomorphic and derived features
that clarify early sauropod evolution, increase our
anatomical knowledge of basal sauropods, and shed new
light on their patterns of early diversifications.