 Paul noted several differences between the "Mantellisaurus" type (NHMUK R5764) and IRSNB 1551.The "Mantellisaurus" type had proportionally shorter forelimbs with a larger pelvis and he argued it was probably more bipedal, whereas IRSNB 1551 was more likely to be quadrupedal.Paul also noted that the snout and trunk of IRSNB 1551 were proportionally longer than the "Mantellisaurus" type specimen.