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Ganzhousaurus, new oviraptorid from Upper Cretaceous of China



From: Ben Creisler
bcreisler@gmail.com

A new genus in Zootaxa:

Shuo Wang, Chengkai Sun, Corwin Sullivan & Xing Xu (2013)
A new oviraptorid (Dinosauria: Theropoda) from the Upper Cretaceous of
southern China.
Zootaxa 3640 (2): 242–257
http://dx.doi.org/10.11646/zootaxa.3640.2.7
http://www.mapress.com/zootaxa/content.html
Preview first page:
http://www.mapress.com/zootaxa/2013/f/z03640p269f.pdf


This paper describes a new oviraptorid dinosaur taxon, Ganzhousaurus
nankangensis gen. et sp. nov., based on a specimen collected from the
Upper Cretaceous Nanxiong Formation of Nankang County, Ganzhou City,
Jiangxi Province, southern China. This new taxon is distinguishable
from other oviraptorids based on the following unique combination of
primitive and derived features: relatively shallow dentary; absence of
fossa or pneumatopore on lateral surface of dentary; weakly downturned
anterior mandibular end; shallow depression immediately surrounding
anterior margin of external mandibular fenestra; external mandibular
fenestra subdivided by anterior process of surangular; dentary
posteroventral process slightly twisted and positioned on mandibular
ventrolateral surface; shallow longitudinal groove along medial
surface of dentary posteroventral process; angular anterior process
wider transversely than deep dorsoventrally; sharp groove along
ventrolateral surface of angular anterior process; ventral border of
external mandibular fenestra formed mainly by angular; ventral flange
along distal half of metatarsal II; and arctometatarsal condition
absent. Phylogenetic analysis places Ganzhousaurus nankangensis gen.
et sp. nov. in the clade Oviraptoridae, together with Oviraptor,
Citipati, Rinchenia and the unnamed Zamyn Khondt oviraptorid.