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RE: Two New Dinosaurs



> From: owner-dinosaur@usc.edu [mailto:owner-dinosaur@usc.edu]On Behalf Of
> Mikko K. Haaramo
>
> And this creature is??
>
> Hadrosauridae: ?Hadrosaurinae:
>
> What else??

The phylogenetic analysis in the paper (based mostly on Norman's basal 
iguanodont chapter in Dinosauria II) places it as a basal
styracosternan in a trichotomy with Lurdusaurus and Hadrosauriformes 
(Ouranosaurus, Iguanodon spp., and hadrosauroids).

The known elements are a mandible missing the predentary, isolated maxillary 
and dentary teeth, cervical and dorsal verts, sternal
plates, ribs, and both pubes.

The generic name comes from Lanzhou (capital of Gansu Province), and of course 
the trivial nomen means "big tooth". Individual teeth
are up to 75 mm wide and 140 mm tall. (It apprently didn't get the memo that 
iguanodontians were increasing the number of tooth
positions, since it has only 14 dentary tooth positions).

Estimated length is 10 m, mass is about 5500 kg.

                Thomas R. Holtz, Jr.
        Senior Lecturer, Vertebrate Paleontology
Department of Geology           Director, Earth, Life & Time Program
University of Maryland          College Park Scholars
        Mailing Address:
                Building 237, Room 1117
                College Park, MD  20742

http://www.geol.umd.edu/~tholtz/
http://www.geol.umd.edu/~jmerck/eltsite
Phone:  301-405-4084    Email:  tholtz@geol.umd.edu
Fax (Geol):  301-314-9661       Fax (CPS-ELT): 301-405-0796