Eosinopteryx and the origin of birds

["Dawid Mazurek" <dawidmazurek@wp.pl>]

Let's leave for a moment questions regarding ontogentic age, plumage reduction 
& cursorial abilities of _Eosinopteryx_. Having read the paper some time ago, 
IMHO it's getting increasingly probable that some kind of archaeopterygid 
(Anchiornis/Archaeopteryx-like form) living back in Jurassic was ancestral both 
to Avialae and (secondarily fligthless) deinonychosaurs...

If you're an optimist (i.e. Tiaojishan, Solnhofen & Jehol biotas are anyhow 
representative of morphological and spaciotemporal distribution of Mesozoic 
Paraves), if the cladogram of Godefroit et al. (2013) is more or less correct 
and if it's not being read LITERALLY while reconstructing phylogeny, and if you 
don't care much about phylogenetic definitions, this hypothetical scenarion can 
be assumed:
1. primitive birds arose sometime in the (Early?) Jurassic as supported by 
ichnological record
2. at the Middle/Upper Jurassic they give rise to a flightless lineage of 
troodontids
3. some reversed do occur leading to arboreal, gliding and secondary flying 
forms, i.e. Microraptor and alike
4. sometime in the Early Cretaceous troodontids give raise to macropredatory 
dromeosaurs

The weirdest thing in the Godefroit et al.'s (2013) analysis is that Archie & 
Wellnhoferia are in politomy with deinonychosaurs and taking into account how 
this two former genera are alike morphologically, temporally and 
biogeographically (in reality being islander sister taxa?), and similar to 
basal deinonychosaurs (troodontids - Xiaotingia i Anchiornis), then, if the 
topology presented is more or less correct, I can see no other possibility than 
Archie or related taxon of similar morphology 
being ancestral or at least archetypical for Paraves.

What do you think?

Dawid