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New Jurassic sauropod material from China



From: Ben Creisler
bh480@scn.org

A new online paper:

Oliver Wings, Daniela Schwarz-Wings and Denver W. Fowler (2011)
New sauropod material from the Late Jurassic part of the Shishugou
Formation (Junggar Basin, Xinjiang, NW China). 
Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen (advance
online publication)
DOI: 10.1127/0077-7749/2011/0183
http://www.ingentaconnect.com/content/schweiz/njbgeol/pre-prints/0183


Abstract:

In April 2006, three new dinosaur localities were discovered in the upper
part of the Middle to Late Jurassic Shishugou Formation within "Dinosaur
Valley", a classic Junggar Basin locality for Jurassic vertebrates.
Recovered bones comprise cervical vertebrae of an adult and a juvenile
sauropod and several sauropod forelimb elements. The vertebrae show several
affinities to Mamenchisaurus, but a generic assignment cannot be undertaken
considering the fragmentary nature of the material and the uncertain status
of taxa assigned to the genus Mamenchisaurus. Comparisons make it likely
that they are more closely related to Mamenchisaurus and Omeisaurus than to
other eusauropods and Euhelopus. All vertebrae expose an accessory lamina
at the vertebral centrum, which might also be present but remained
undescribed in species of Mamenchisaurus. Indications in the forelimb
elements, such as humerus, ulna, and pollex claw, do not allow a
determination of the taxa, although there are no distinct differences to
Mamenchisaurus. The remains are important because of their extreme size,
including potentially the first recognized juvenile remains of a
Mamenchisaurus relative, and demonstrate further evidence for the
occurrence of non-neosauropod eusauropods in the Junggar Basin. 



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