Protohadros, Head, 1998

Norman, David B., 2015, On the history, osteology, and systematic position of the Wealden (Hastings group) dinosaur Hypselospinus fittoni (Iguanodontia: Styracosterna), Zoological Journal of the Linnean Society 173 (1), pp. 92-189 : 157-158

PROTOHADROS BYRDI HEAD, 1998

Protohadros is represented by a partial skull and fragments of the postcranium collected from the Cenomanian of Texas ( Head, 1998). This represents a comparatively derived ornithopod whose anatomy differs substantially from that of Hy. fittoni .

Teeth and jaws

The dentary teeth ( Head, 1998: fig. 13) appear to be narrower in lingual view than those seen in Hy. fittoni and more symmetrical, exhibiting a prominent submedian primary ridge. The lower jaw is represented by a well-preserved dentary that is deeply expanded anteriorly, as well as being strongly arched along its length. The dentition was clearly borne in a deep alveolar trough and posteriorly there is a tall, perpendicular coronoid process ( Head, 1998: fig. 11).

Postcranial skeleton

What little is currently known ( Head, 1998) cannot be compared with that of the hypodigm of Hy. fittoni .