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Re: Details on Hulsanpes



a0000265@unet.univie.ac.at wrote-

> He? Osmólska is a woman, otherwise her name would be Osmólski...

Dreadfully sorry, especially to Halszka!

> Patagopteryx too? So it's neither a euornithine nor an alvarezsaur? Or is
> it? :-(

My and others analyses place it as a non-ornithurine euornithine.

> > but is absent in Confuciusornis.
>
> Nope. The excellent specimen in the Natural History of Vienna clearly
shows
> enlarged claws on the shortened, robust 2nd toes, and the feet look
exactly
> like an old illustration of a dromaeosaurid foot (with reverted 1st toes),
> except that the claws are not THAT big as in dromaeosaurids or Rahonavis.
> Sereno's famous paper confirms this:
> P. C. Sereno: The Evolution of Dinosaurs. Science 284, 2137 - 2147 (25
June
> 1999)

Ah, but Chiappe et al. (1999) in their monograph of confuciusornithids
state, "Confuciusornis sactus lacks the predatorial specializations of digit
II seen in Rahonavis ostromi and retained to a lesser degree in certain more
advanced birds, such as Patagopteryx deferrariisi."
And, "This (the hallux) and the remaining ungual phalanges bear well
developed flexor tubercles and are approximately the same size."
(parentheses mine)
And, "The distal trochlea of metatarsal II also lacks a ginglymoideal
articulation."
Personal examination of figure 45 in that publication indicates that pedal
ungual II is a whopping 5% larger than pedal ungual III, while pedal ungual
IV is 5% shorter.

Chiappe, L.M., Ji, S., Ji, Q., and Norell, M.A. 1999. Anatomy and
systematics of the Confuciusornithidae (Theropoda: Aves) from the Late
Mesozoic of northeastern China. Bulletin of the American Museum of Natural
History 242: 1-89.

> So Vorona does have a "terrible claw", as The Dinosauricon and nobody else
> states?

I wrote, "Hulsanpes appears to resemble Vorona and Patagopteryx more than
confuciusornithids based on the presence of a ginglymoideal articulation on
metatarsal II."
A ginglymoideal articulation, though perhaps neccessary for a sickle claw,
does not imply one's presence by any means.  Unfortunately, no phalanges are
present in the holotype or referred specimen of Vorona.

> > Figures of the metatarsus and phalanx II-1 are available to those who
> > contact me offline.
>
> Offlist?

Well, aren't we picky? ;-)

Mickey Mortimer