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Here's a couple of new papers out:
PETER J. MAKOVICKY, MARK A. NORELL, JAMES M. CLARK, and TIMOTHY ROWE. 2003.
Osteology and Relationships of _Byronosaurus jaffei_ (Theropoda:
Troodontidae). American Museum Novitates: No. 3402, pp. 1?32.
Nicely detailed description (with CAT scanned images) of _Byronosaurus_.
Features described for the first time in Troodontidae include an extensive
secondary palate, an tubular opening interpreted as a subnarial foramen
(also found in Alvarezsauridae), and a connection between the antorbital and
accessory fenestrae though the interfenestral bar.
The authors recognize the following as troodontid synapomorphies:
Dentary nutrient foramina situated in a horizontal groove on labial face of
Pneumatic quadrate with pneumatopore on posterior face
Basisphenoid recess absent
Dorsoventrally flattened internarial bar
Closely packed anterior dentition in symphyseal region of dentary
Depression on the ventral surface of the postorbital process of the
Reduced basal tubera that lie directly ventral to the occipital condyle
Large number of teeth
Long, slender transverse processes
and the following unite all non-_Sinovenator_ troodontids:
Presence of a subotic recess on the side of the braincase ventral to the
Metatarsal IV oval in cross section, deeper than wide
Large otosphenoidal crest defining lateral depression on side of braincase
Presence of enlarged, distally oriented denticles
Also just out:
Holtz, T.R., Jr. 2003. Dinosaur predation: evidence and ecomorphology. Pp.
325-340, in P.H. Kelley, M. Kowalewski and T.A Hansen (eds.), Predator-Prey
Interactions in the Fossil Record, Topics in Geobiology Vol. 20. Kluwer
>From the acknowledgments: "The author would like to acknowledge... the
participants of the Internet Dinosaur Mailing List (firstname.lastname@example.org), for
sharing their thoughts and comments on the predatory modes of theropod
Thomas R. Holtz, Jr.
Department of Geology Director, Earth, Life & Time Program
University of Maryland College Park Scholars
College Park, MD 20742
Phone: 301-405-4084 Email: email@example.com
Fax (Geol): 301-314-9661 Fax (CPS-ELT): 301-405-0796