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RE: Thoughts on Tanycolagreus
> From: firstname.lastname@example.org [mailto:email@example.com]On Behalf Of
> Jaime A. Headden
[lots of stuff snipped!]
> Nonetheless, the similarities
> between *T. topwilsoni* and *D. paradoxus* are unmistakable and provide the
> following hypothesis:
> *Tanycolagreus topwilsoni* is the most basal member of Tyrannosauroidea, and
> provides the most complete skeletal evidence for Tyrannosauroidea in the Upper
> Jurassic, affirming *Aviatyrannis jurassica* and *S. clevelandi* as
> Further data would arrive in the form of a more indepth analysis and
> inclusion of *T. topwilsoni* into a cladistic analysis, such as Holtz' latest
> monster, and the presence of two tyrannosauroids in the Morrison Formation may
> argue that *S. clevelandi* and *T. topwilsoni* are synonyms, yet the only
> comparable material so far are caudal vertebrae.
I haven't included it yet, but planned on including it for the Rockford Jane
symposium. However, my impressions run pretty close to
yours, and I wouldn't be terribly surprised if it isn't a basal tyrannosauroid.
Incidentally, it is decent sized animal: Carpenter et al. estimate the
Cleveland-Lloyd individual at about 3.5 m long.
Thomas R. Holtz, Jr.
Department of Geology Director, Earth, Life & Time Program
University of Maryland College Park Scholars
Building 237, Room 1117
College Park, MD 20742
Phone: 301-405-4084 Email: firstname.lastname@example.org
Fax (Geol): 301-314-9661 Fax (CPS-ELT): 301-405-0796