Revised December 27, 2015 with extended scapulae on both the tracing and reconstruction.
Yes, I know it has feathers
And yes, it has a tail stiffened with elongated processes.
And yes, it has long ‘raptor’ fingers.
And yes, it could have had a posteriorly-oriented pubis.
And it had relatively shorter hind limbs.
I was really hoping
this one would pull the other micro- aptors back to raptor-ville.
the present (and always provisional) suite of character traits currently attributed to ‘Dave’, the Sinornithosaurus (NGMC 91, Ji et al. 2001) nests it (Fig. 3.) with Microraptor (in the large reptile tree at 619 taxa) which nests with Compsognathus and Tianyuraptor + Zhenyuanlong + Tyrannosaurus. Not Velociraptor.
sometimes you just have to go where the data takes you.
Some interesting things happen
when you play deletion games. For instance, delete the four taxa closest to Sinornithosaurus and there’s a shift in tree topology. T-rex nests between Sinocalliopteryx + Allosaurus and Compsognathus, which nests basal to Sinornithosaurus, and the rest of the tree is the same. The re-insertion of any one of the deleted taxa does not repair the tree other than Tianyuraptor, which alone restores the topology.
And finally, a little about Sinornithosaurus
I note oddly small coracoids here. While the coracoid is elongated, it is also much smaller, probably due to a reduction in flapping capabilities. The so-called ‘killer’ toe claw (#2) is long and gracile, not what you might call robust. Perhaps ideal for perching, but pedal digit 1 is also oddly tiny. The specimen appears to have smaller wing feathers than in Microraptor, it’s provisional ancestor sister. It also has shorter teeth and a down-tipped premaxilla.
Ji Q, Norell MA, Gao KQ, Ji S-A and Ren D 2001. The distribution of integumentary structures in a feathered dinosaurs. Nature, 410(6832): 1084-1087.