[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
Re: Sinocalliopteryx (Theropoda: Compsognathidae) ate confuciusornithids and dromaeosaurids
I doubt if either of these studies are the last word on the topic.
> However, the assumption that basal (non-ornithothoracean) avialans
> were capable of powered flight is on very thin ice. Not just because
> of the conclusions of the above two studies, but also the inferred
> absence of an elevating supracoracoideus.
What about the deltoideus? That's what bats use, and apparently what
pterosaurs used, too. Indeed, in eumaniraptorans, the deltopectoral
crest is huge even in *Ichthyornis* (an animal that doesn't make sense
as anything but a powered flier).
In any case, it is highly unlikely that confuciusornithids (and other
> basal avialans) were capable of a ground-level take-off.
Assuming they were capable of powered flight in the first place -- why?
Pigeons need the supracoracoideus to take off from the ground, but other
birds don't. After all, almost all the force for taking off comes from
the hindlimbs. Even hummingbirds don't just stand there and flap, they