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Re: semilunate carpal
In a message dated 8/9/01 11:06:22 AM EST, email@example.com writes:
<< _Archaeopteryx_'s integument is highly derived, but its osteology is much
less so (hence its "mosaic" morphology). As I said in a previous response,
_Archaeopteryx_'s skeleton is not all that different from that of many
non-avian maniraptorans. (Professor Ostrom, take a bow.) >>
The skull of Archaeopteryx is much more birdlike than the skull of any known
dromaeosaurid. Dromaeosaurids branched away from the bird lineage quite a bit
earlier than the appearance of Archaeopteryx. I'd say their "ghost lineage"
is about 20 million years long. Something like the ghost lineage of ostriches
from flying paleognaths.