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Ornithischian clavicles
Hi all,
Does anyone know of ossified clavicles being found in ornithischian
dinosaurs other than Psittacosaurus, Protoceratops, Montanoceratops and
Leptoceratops? I know that Sereno (1999, 2000), Chinnery and Weishampel
(1998) and Xu et al (2002) code the loss of ossified clavicles as a derived
state of the ceratopsids, yet if they are in fact absent elsewhere in the
Ornithischia then their presence is actually a derived condition of some
basal Neoceratopsians. Right?