FIGURE 10 in A taxonomy of iguanodontians (Dinosauria: Ornithopoda) from the lower Wealden Group (Cretaceous: Valanginian) of southern England

FIGURE 10. Hypselospinus fittoni (Lydekker, 1889) comb. nov. Referred material. NHMUK R1831, right dentary. A. Medial view, reproduced from Owen (1874: pl.1, fig. 1). B. Medial view, sketch drawing taken from the original dentary (December 2009). C. The 'Brickenden jaw' (NHMUK 28660). Sketch (November 2009) in medial view for comparison with NHMUK R1831 (above). This is the right dentary of a large iguanodontian of robust build (attribution unconfirmed at present but it may prove to be attributable to B. dawsoni – Norman in preparation) collected by Col. Brickenden from a quarry near Cuckfield, Sussex. Abbreviations: am – level of alveolar margin; at – 'anomalous tooth' (no longer associated with the jaw); br – extensively broken and crushed dorsal portion of the dentary ramus; ds – dentary-dentary symphysis; m – matrix infill of the Meckelian canal, the medial surface of the postdentary bones and the alveoli; mgr – Meckel's groove; mt – matrix and tooth crown removed since the lithograph was prepared; pr – 'prong' at the anterior end of the dentary ramus that locks against the lateral surface of the median ventral flap of the predentary; sh. alv – large area of the posterior alveolar shelf that has been sheared away post-mortem.