[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
Fwd: Re: Falcarius utahensis (was RE: Newfound Dinosaur a Transitional Creature)
I got an error message sending this, but it registers as sent in my mailbox, so
I will send again just in case, and appologies for the repeat to anyone that
gets TWO annoying messages from me.
> Tim Williams (firstname.lastname@example.org) wrote:
> <The anatomy of _Falcarius_ indicates that the teeth (small, leaf-like) and
> pelvis were among the first things to change in the transition from carnivory
> to herbivory in therizinosauroid evolution. Nevertheless, "similarities
> between the dentition of the basal therizinosaur _Falcarius_ and the basal
> oviraptorosaur _Incisivosaurus_, ... raises the possibility that the common
> ancestor of these clades [Oviraptorosauria, Therizinosauroidea] had already
> undertaken the initial steps in this transition." But I wonder if this
> transition might have begun even earlier, based on the dentition of
> and the posterior shift of the pubic shaft that appears to be primitive for
> This is a very beautiful animal, and I was so happy to finally see it
> presented in Denver last year for SVP. Kudos on a great and imaginitive name!
> To note, though, it is my observation that "rootward" segnosaurs like
> *Falcarius* and *Beipiaosaurus* possessed relatively mesopubic pelves, while
> reversion was occuring in *Nothronychus* and *Alxasaurus*. Similar vertical
> pubes occur in *Nomingia*, *Caudipteryx*, and apparently also in _some_ of
> oldest troodontids, such as *Sinornithoides* (whereas *Sinovenator* appears
> have a somewhat opisthopubic pelvis). It would be likely, therefore, that a
> vertical pubis was the primitive condition for segnosaurs.
> Jaime A. Headden
> Little steps are often the hardest to take. We are too used to making
> leaps in the face of adversity, that a simple skip is so hard to do. We
> should all learn to walk soft, walk small, see the world around us rather
> than zoom by it.
> "Innocent, unbiased observation is a myth." --- P.B. Medawar (1969)
> Yahoo! Mail Mobile
> Take Yahoo! Mail with you! Check email on your mobile phone.
Jaime A. Headden
Little steps are often the hardest to take. We are too used to making leaps
in the face of adversity, that a simple skip is so hard to do. We should all
learn to walk soft, walk small, see the world around us rather than zoom by it.
"Innocent, unbiased observation is a myth." --- P.B. Medawar (1969)
Yahoo! Mail Mobile
Take Yahoo! Mail with you! Check email on your mobile phone.