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RE: Antarctosaurus mandible
> From: email@example.com [mailto:firstname.lastname@example.org]On Behalf Of
> Marco Auditore
> Hi to all dinolist members.
> I want to know if, in light of the discovery of the new titanosaur
> Rapetosaurus, is possible that the partial dentary originally assigned by
> Von Huene to Antarctosaurus wichmannianus, and then assigned to the
> rebbachisaurids, was in fact the mandibles of Antarctosaurus or, at least,
> of titanosaurian nature.
Although that does remain a possibility, the A. wichmannianus mandible
shares features with Nigersaurus that are not found in titanosaur skulls
*The teeth are arrayed in rows only along the anterior margin (not unlike
grazing rhinos, among other taxa); in Rapetosaurus the teeth extend down
most of the length of the dentary
*The dentary forms a real nice right angle between the tooth-bearing surface
and the ramus leading posteriorly to the post-dentary bones; in Rapetosaurus
(and other titanosaurs), the dentary is more gently curved.
So the weight of the evidence points to A. wichmannianus being a
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