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Sereno's ceratopsians

In followup to the message I just out in reply to Keesey, here is Sereno's
ceratopsian cladogram from the 1997 paper:

Ceratopsia
-Psittacosaurus
-Neoceratopsia
--"Chayoungosaurus"
--unnamed
---unnamed
----Leptoceratops
----Udanoceratops
---unnamed (perhaps Coronosauria Sereno 1986)
----Protoceratopsidae
-----Microceratops
-----Bagaceratops
-----Protoceratops
----Ceratopsoidea
-----Montanaceratops
-----unnamed
------Turanoceratops
------Ceratopsidae

Enjoy.

Thomas R. Holtz, Jr.
Vertebrate Paleontologist     Webpage: http://www.geol.umd.edu
Dept. of Geology              Email:th81@umail.umd.edu
University of Maryland        Phone:301-405-4084
College Park, MD  20742       Fax:  301-314-9661