Psittacosaurus species and synonyms

["Alessandro Marisa" <amaris@tin.it>]

Hello listmember,
In my computer data file I have registered almost 10 species of the genus
Psittacosaurus, I say that a lot of this is synonym of other, I have
synonymized as follows:
1- Psittacosaurus mongoliensis including: P. guyangensis, P. osborni,
P.tingi, and Protoiguanodon mongoliensis.
2- Psittacosaurus sinensis including: P. youngi.
3- Psittacosaurus xinjiangensis.
4- Psittacosaurus meileyingensis.
5- Psittacosaurus neimongoliensis.
6- Psittacosaurus ordosensis.
7- Psittacosaurus sattayaraki.
and a lot of undetermined Psittacosaurus from Tujingzi Formation, Ejinhoro
Formation and Luohandong Formation.
In this way I have only 7 species plus a lot of undetermined specimens of
Psittacosaurus, is right?
And could someone tell me the reference of the description of Psittacosaurus
sinensis?

By and thank's
Alessandro Marisa
"Volunteer of Paleontological Museum of Monfalcone"
Via Achille Grandi n°18
38068 ROVERETO (TN) ITALY
Tel: 039-0464-434658 Email: amaris@tin.it