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Philovenator, new troodontid from Late Cretaceous of Inner Mongolia, China



From: Ben Creisler
bcreisler@gmail.com


A new taxon Philovenator (named in part for Phil Currie) in the new
issue of Vertebrata PalAsiatica:

XU Xing, ZHAO Qi, Corwin Sullivan, TAN Qing-wei, Martin SANDER & MA
Qing-yu (2012)
THE TAXONOMY OF THE TROODONTID IVPP V 10597 RECONSIDERED.
Vertebrata PalAsiatica 50(2):140-150
http://www.ivpp.cas.cn/cbw/gjzdwxb/xbwzxz/201204/P020120423369968204026.pdf


The partial troodontid hindlimb IVPP V 10597 was originally described
as a juvenile Sauronithoides mongoliensis. The present study
reconsiders the taxonomic placement of this interesting specimen,
given the significant advances in understanding of the Troodontidae
that have taken place since it was first described. Morphological
comparison and numerical phylogenetic analyses indicate that V 10597
is more closely related to the sympatric Linhevenator tani than to
Sauronithoides mongoliensis, raising the possibility that V 10597
might be juvenile L. tani. However, V 10597 differs significantly from
other troodontids, including L. tani, in numerous hindlimb features
and particularly in the proportions of various hindlimb elements.
These differences are likely to be taxonomic, and suggest that V 10597
represents a new troodontid. Furthermore, histological analysis
indicates that V 10597 is unlikely to be juvenile of L. tani or any
other large troodontid. Based on the available morphological and
histological information, we propose the erection of a new taxon,
Philovenator curriei gen. et sp. nov., based on V 10597. This new find
increases the known taxonomic diversity and morphological disparity of
Late Cretaceous troodontids.