Fukuisaurus, Kobayashi & Azuma, 2003

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 : 148

FUKUISAURUS TETORIENSIS KOBAYASHI & AZUMA, 2003

This taxon is based upon a disarticulated partial skull and an isolated sternal plate of a comparatively small (∼ 4 m long) ornithopod collected from Kitadani Quarry , Fukui Prefecture, Japan. The geological age of the material is late Hauterivian−Barremian .

Teeth and jaws

The dentary crowns ( Kobayashi & Azuma, 2003: fig. 5C, D) are similar in general shape to those described in Hy. fittoni . The published description ( Kobayashi & Azuma, 2003: 170–171) is at variance with the actual appearance of the teeth: a well-defined primary ridge is clearly distally offset on the lingual surface of the crown and there is a mesially positioned secondary ridge and minor accessory ridges are present extending thecally from the marginal denticles on the mesial edge of the crown. Details of the secondary ridge and accessory ridges differ from those seen in Hy. fittoni dentary crowns. The dentary ( Kobayashi & Azuma, 2003: fig. 4C, D) is robust and comparatively short, has an anterior end that is straight and somewhat tapered (rather than being arched), and there is a tall, perpendicular coronoid process; all these features are distinct from those seen in material referred to Hy. fittoni .

Appendicular skeleton

A hatchet-shaped sternal, very similar in outline to that seen in M. atherfieldensis ( Norman, 1986: figs 45, 46) and distinct from the robust, posteromedially ‘aproned’ form seen in Hy. fittoni is the only element so far reported in this taxon.