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

Re: "Morosaurus" agilis



Thomas R. Holtz, Jr. wrote:

> Under current taxonomies, Coelurosauria refers to birds and all theropods
> sharing a more recent common ancestor with birds than with Carnosauria
> (Gauthier, 1986), and Carnosauria refers to Allosaurus and all theropods
> sharing a more recent common ancestor with Allosaurus than with
> Coelurosauria (Padian et al., in review; see also Holtz & Padian 1995
> (abstract for SVP)).  Many theropods, however, are neither coelurosaurs nor
> carnosaurs.

I am somewhat confused here.  If Coelurosauria contains all theropods
closer to birds than Allosaurus and Carnosauria includes all theropods
closer to Allosaurus than Coelurosauria, how do you have theropods that
are neither?  It appears that all theropods seem to be split into these
two groups by those definitions.

Joe Daniel