Hypselospinus

Hypselospinus is a genus of iguanodontian dinosaur which was first described as a species of Iguanodon (I. fittoni) by Richard Lydekker in 1889, the specific name honouring William Henry Fitton.

==History and naming== In the 1880s, the Natural History Museum, London, purchased multiple collections of fossils discovered by Charles Dawson from the region Hastings. Among these collections of specimens were multiple individuals identified as species of Iguanodon by British palaeontologist Richard Lydekker, from the Early Cretaceous Wadhurst Clay Formation. The first of these specimens, NHMUK R.1635, was found in Shornden Quarry over distance of , and includes a partial and believed to be from a single individual. As the specimen was smaller than and younger than the similar and nearby species Iguanodon dawsoni and the pelvis showed some differences, Lydekker chose to name the new species Iguanodon fittoni in 1889, with the species name honouring William Henry Fitton who had worked in the Early Cretaceous strata of England.