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Re: Psittacosaurus queries

----- Original Message -----
From: "Mickey Mortimer" <Mickey_Mortimer111@msn.com>
To: <dinosaur@usc.edu>
Sent: Saturday, July 06, 2002 6:57 AM
Subject: Re: Psittacosaurus queries

> Psittacosaurus mazongshanensis is diagnosed in Xu (1997) by- elongate
> (ventral surface of mandible formed mostly be dentary); deep buccal recess
> on maxilla; posterior maxillary process projects ventrally; sharp right
> angle between ventral and medial margins of jugal; lateral process on
> rim of predentary; more than fourteen denticles on maxillary crowns;

The high number of denticles could be a character that linking P.
xinjiangensis and P. mazongshanensis.

Alessandro Marisa
Via Achille Grandi n°18
Rovereto (TN) ITALY
Tel: 039-0464-434658 Email: amaris@tin.it