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Re: Oryctos Is Back
Total-evidence approach. Throw it all together and see
which signal is strongest.
The biogeography doesn't seem right. Dispersal of semi-volant
microtheropods around the J-K boundary would be predominantly E -> W IIRC
and they'd have to do a generous bit of ocean crossing for which they were
Then maybe the dispersal just happened earlier.
What seems certain is that highly interesting marerial is liable to occur
in the E slope of the Urals. And perhaps also in some former islands in C
Europe, but I think many have been rather well-explored.
There are extremely few sites from the J-K boundary.
What do you mean? Fusion in adults is the plesiomorphic
condition here, and
a joint the derived one. (Also found in *Rahonavis* and
some or all of the
Chinese long-tailed "birds", I forgot which ones.
Not found in *Sapeornis*
What I mean is how to score the difference between enantis and euornis.
Not as a binary character (fusion/joint).
Indeed not. There's suture/fusion, a joint with flat surfaces (*Jibeinia*
has that if I remember correctly), a joint with a peg on the coracoid and a
socket on the scapula (seen in enantis and the "long-tailed birds"), and a
joint with a socket on the coracoid and a peg on the scapula (seen in
How well is tarsometatarsus evolution documented?