Iguanodon
There are at least two species recognised:I. bernissartensis, described by George Albert Boulenger in 1881, is the type species for the genus. This species is best known for the many skeletons discovered in a coal mine in Bernissart, Belgium in 1878. The coal dates to the earliest Cretaceous period. 36 adult skeletons were excavated at this site, a coal mine. This is by far the largest find of this species. The species is large and strong.I. galvensis, described in 2015, is based on adult and juvenile remains found in deposits in Teruel, Spain, dating to about 126 mya.