[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]

Re: Mononykus

You wrote: 
>        Note that I meant (and I understand that this was unclear) 
>(in adults) keel" on an "ossified (in adults) sternum". Clearly, the 
>is primitive for Archosauria. The ossified keel is derived. Whether a
>cartilagenous [sic?] keel was present in most theropods may be 
>        Since the current distribution of that character is confined 
to "the
>'headless' wonder", _Mononykus_, and various ornithothoracine birds
>(assuming mony isn't one), and other charcters presumably suggest that 
>'headless' wonder" is not a bird (sorry, George, as scientists, we 
>proceed from the hypothesis which best fits the evidence; "BCF" does 
>then the ossification of the sternal keel is most likely to have 
happened at
>least twice.

And what if the sternum of Mononykus isn't a sternum? What then?