[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]

Dongyangopelta, new nodosaur from Early Cretaceous of China



From: Ben Creisler
bcreisler@gmail.com

A new paper (the pdf download does not appear to work for this link):


CHEN Rongjun,  ZHENG Wenjie,  Yoichi AZUMA,  Masateru SHIBATA,  LOU
Tianliang,  JIN Qiang &  JIN Xingsheng (2013)
A New Nodosaurid Ankylosaur from the Chaochuan Formation of Dongyang,
Zhejiang Province, China.
Acta Geologica Sinica (English Edition) 87(3): 658-671
http://www.geojournals.cn/dzxben/ch/reader/view_abstract.aspx?file_no=201303003&flag=1


Dongyangopelta yangyanensis gen. et sp. nov. from the Chaochuan
Formation (Albian - Cenomanian) of Dongyang, Zhejiang Province, China
is characterized: the convex anterior surface of the first presacral
rod centrum strongly inflates laterally and slightly curves
posteriorly; the fused pelvic shield composes of larger pebble-shaped
bosses, defined by smaller tubercles or flat stretches of bone; most
osteoderms are heavily roughened with notches and grooves for dermal
attachment along the edge; domed triradiate osteoderm is present;
sigmoid curvature of the dorsal surface of the ilium is present; the
preacetabular process curves lateroventrally at the anterior end and
has a shallow groove in the edge of the lateral and anterior ends and
strong lateromedial expansion of the distal femur. The femoral head is
well separated from the greater trochanter, indicating that
Dongyangopelta is a nodosaurid ankylosaur, the second from southeast
China. Phylogenetic analysis also positions this taxon in the
Nodosauridae clade. Dongyangopelta differs from Zhejiangosaurus in the
characters of presacral rod, ilium, and femur. Dongyangopelta
represents the first ankylosaur outside North America and Europe that
definitively possesses a pelvic shield with fused armor.
==