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Shansisuchus from Triassic of China (free pdf)



From: Ben Creisler
bcreisler@gmail.com


A new paper. The link here has the pdf in open access:

WANG Runfu, XU Shichao, WU Xiaochun, LI Chun and WANG Suozhu (2013)
A New Specimen of Shansisuchus shansisuchus Young, 1964 (Diapsida:
Archosauriformes) from the Triassic of Shanxi, China.
Acta Geologica Sinica(English Edition)87(5): 1185-1197
DOI: 10.1111/1755-6724.12145
http://www.geojournals.cn/dzxben/ch/reader/view_abstract.aspx?file_no=201305001&flag=1

Shansisuchus shansisuchus Young, 1964 was restudied on the basis of a
new specimen. Some anatomical features that were either briefly or not
described at all in the original study were detailed. The new specimen
not only provides further information on the skull anatomy and the
vertebral column but also expands the range of the geographical
distribution of the taxon. With new information, the diagnosis of S.
shansisuchus was emended and its phylogenetic relationships were
further analyzed. S. shansisuchus differs from other archosauriforms
primarily in the presence of a large subnarial fenestra anterior to
the antorbital fenestra, tongue-in-groove articulations between the
ascending process of the premaxilla and nasal and between the
premaxilla and maxilla, a tall and posterodorsally directed ascending
process of the maxilla, a knee-shaped process of the postorbital
projecting into the orbit, a broad descending process of squamosal
distally well forked and a large, deeply bow-shaped intercentrum
tightly anchoring/capping the sharp ventral edges of two neighboring
centra together in cervical and at least first eight dorsal vertebrae.
With additional information derived from the new specimen, the
phylogenetic relationships of S. shansisuchus were reanalyzed; it is
closely related to Erythrosuchus-Vjushkovia clade.