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Fierce Compsognathid, try 2



One more tidbit for the evening: marauding, dromaeosaurid-eating, giant
Yixian compsognathids


A New Giant Compsognathid Dinosaur with Long Filamentous Integuments from
Lower Cretaceous of Northeastern China JI Shu?an*, JI Qiang, LÜ Junchang
and YUAN Chongxi Institute of Geology, Chinese Academy of Geological
Sciences, Beijing 100037 Key Laboratory of Stratigraphy and Paleontology,
Chinese Academy of Geological Sciences, Beijing 100037 ACTA GEOLOGICA
SINICA Vol. 81 No. 1 pp. 8?15 2007-03-01 15:27:36

Abstract: A new compsognathid dinosaur, Sinocalliopteryx gigas gen. et
sp. nov., is erected based on a complete skeleton from the Early
Cretaceous Yixian Formation of western Liaoning, northeastern China. It
shares the features with Huaxiagnathus orientalis in having a manus as
long as the humerus plus radius, very large and subequally long manual
claws I and II, and reduced olecranon process on the ulna. But it differs
from Huaxiagnathus orientalis in having the much large size, a very long
maxillary process of premaxilla not extending the vertical level of the
maxillary antorbital fossa, and the proportionally longer ulna and so on.
Sinocalliopteryx gigas gen. et sp. nov. represents the largest species
among the known compsognathid dinosaurs, suggesting the tendency of the
body enlargement in compsognathids to some extent. The long filamentous
integuments are attached to the whole body of this compsognathid,
confirming that such integuments evolved firstly in the basal
coelurosaurs. This new giant compsognathid was a fierce carnivorous
theropod, as shown further by an incomplete dromaeosaurid leg inside its
abdominal cavity.


The abstract can also be found at
http://www.geosociety.org.cn/c_b_w4_gournals.htm; just click on the Vol.
81, No. 1 link, then the proper compsognathid-related article.-Justin