Of the tens of thousands of mistakes I have made
while creating ReptileEvolution.com, the LRT and this blog over the last 7 years, this time I read ‘right’ and I applied ‘left’ to the ilium of Mirischia. Here corrections were made within 24 hours of its original posting. Thanks to MM for reporting the error. Apologies for the error.
Naish, Martill and Frey 2004
bring us an Early Cretaceous Santana Formation theropod pelvis and femur they named Mirischia asymmetrica (Fig. 1; SMNK 2349). They align the specimen with the French compsognathid (CNJ79), which is correct.
A key taxon
The traits visible in the Mirischia pelvis and femur (Fig. 1) are just enough to nest it between the Compsognathus clade (which includes tyrannosaurs, ornithomimosaurs and microraptors) and the Ornitholestes clade (which includes dromaeosaurs, troodontids and birds). And it is transitional in size, too.
Choiniere JN, Clark JM, Forster CA and Xu X 2010. A basal coelurosaur (Dinosauria: Theropoda) from the Late Jurassic (Oxfordian) of the Shishugou Formation in Wucaiwan, People’s Republic of China. Journal of Vertebrate Paleontology. 30 (6): 1773–1796.
Naish D, Martill DM and Frey E 2004. Ecology, systematics and biogeographical relationships of dinosaurs, including a new theropod from the Santana Formation (?Albian, Early Cretaceous) of Brazil. Historical Biology 16(2–4):57–70.