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Re: Shenzhousaurus, new ornithomimosaur
This paper is available for download, in .pdf format, from the AMNH digital
----- Original Message -----
Sent: Friday, November 07, 2003 3:30 PM
Subject: Shenzhousaurus, new ornithomimosaur
> From: Ben Creisler firstname.lastname@example.org
> In case this item has not been mentioned yet, the latest issue of American
> Museum Novitates describes a new dinosaur:
> QIANG J., M. NORELL, P. MAKOVICKY, KE-QIN G., SHU'AN J., and CHONGXI Y.,
> 2003. An Early Ostrich Dinosaur and Implications for Ornithomimosaur
> Phylogeny. American Museum Novitates: No. 3420, pp. 1-19.
> TEXT HIGHLIGHTS:
> COELUROSAURIA VON HUENE, 1914
> ORNITHOMIMOSAURIA BARSBOLD, 1976
> ORNITHOMIMINAE SERENO, 1998
> Shenzhousaurus orientalis, new taxon
> TYPE SPECIMEN: NGMC (National Geological Museum of China) 97-4-002.
> MATERIAL: A partial skeleton preserved on a sandstone block in a death
> with its head above the torso. The distal hindlimbs, distal tail, and the
> forelimbs (except for part of the right hand) and the pectoral girdle are
> missing. The head is crushed, exposing the left side obliquely.
> ETYMOLOGY: Shenzhou is the ancient name of China; orientalis refers to the
> TYPE LOCALITY: Sihetun fossil site, Beipiao, Western Liaoning, China
> GEOLOGICAL OCCURRENCE: ...lowermost, fluvial part of the Early Cretaceous
> Yixian Formation...
> an ornithomimosaur distinguishable from all others except Harpymimus in
> having teeth restricted to the anterior dentarys...primitive characters
> found in advanced ornithomimosaurs, like a straight ischium and a
> postacetabular process that is gently curved rather than truncated...
> distinguishable from Pelecanimimus by the tooth distribution pattern and
> the primitive configuration of the hand where digit I is shorter than
> digits II and III.
> Skull length: 185 mm
> Sacrum length 140 mm
> Ilium length: 153 mm
> Ischium length: 169 mm
> Femut length: 191 mm
> Pubic boot length: 62 mm
> The thoracic cavity ...contains numerous pebbles, which are best
> interpreted as gastroliths....
> Ornithomimosaurs are monophyletic and are the sister group to a clade
> composed of Maniraptora (including Ornitholestes... No support was found
> for a close relationship between ornithomimosaurs and troodontids (Holtz,
> 1994 ). Alvarezsaurids, which have been postulated as close
> relatives (Sereno, 2001 ), are found to be the sister group of all other
> Maniraptora except Ornitholestes ...
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