Iguanodon Species and Classification When Iguanodon was first named by Gideon Mantell in 1825 it was simply named 'Iguanodon' with no specific species name. Friedrich Holl created I. anglicum for the holotype of the tooth which had to be changed to I. anglicus for correct grammar. In 1832 Christian Erich Hermann von Meyer named another species I. mantelli which has since been renamed as Dollodon. The discovery of multiple Iguanodon remains in a coal mine near Bernissart in Belgium resulted in a creation of another species I. bernissartensis by George Albert Boulenger in 1881. Because the holotype I. anglicus is based upon only a tooth it is not considered to be diagnostic enough to identify new species, especially when the teeth of other specimens are not present. This had led to the establishment of I. bernissartensis as the neotype, which now replaces I. anglicus as the type that all modern fossils are compared to when palaeontologists suspect they may have found Iguanodon remains. Like other early dinosaurs like Megalosaurus, Iguanodon has suffered from the wastebasket taxon effect resulting in much of the material originally being assigned to it being later found to actually belong the same as other species or even to other dinosaurs. This is particularly the case for far flung specimens from North America and Asia, but even some European specimens have since been found to actually be other species. Most of the species which are still sometimes mentioned are considered dubious in that they probably do no warrant their own group. Unfortunately the list varies between individual palaeontologists and resources, and the only 'safe' species now is the neotype I. bernissartensis. - Monograph on the Fossil Reptilia of the Wealden and Purbeck Formations. Dinosauria (Hylaeosaurus) - Paleontographical Society Monograph 10: 1–26. - Note sur les restes de dinosauriens recontrs dans le Crtac Suprieur de la Belgique.
American Palaeontologist Edward Drinker Cope created the Iguanodontoidea in 1869 which includes Iguanodon and all dinosaurs thought to be similar to it. Because Iguanodon was the first dinosaur of this group to be named, its name was used as the basis of the group name, something that it standard practice in zoological nomenclature when creating new groups of animals. Many other ornithopod dinosaurs like the small Dryosaurus and the more medium sized Camptosaurus lie within the Iguanodontidae, but others such as Ouranosaurus that were once thought to be similar to Iguanodon are now regarded as being closer to the later and more advanced hadrosaurs. Dinosaurs in these cases are usually regarded as being distantly related yet still separate from the main group. - On the structure of the jaws and teeth of the Iguanodon. - On the ornithoidichnites of the Wealden - Quarterly Journal of the Geological Society of London 10: 456–464. - Bulletin du Muse Royal d'Histoire Naturelle de Belgique 2: 205–221 - Louis Dollo - 1883.
The famous teeth of Iguanodon were only present towards the rear of the jaws with the teeth of the lower jaw arranged so that they would rub against the internal sides of the upper teeth. This rubbing motion would create a shearing action similar to how a pair of scissors work, something which enabled Iguanodon to bite through tougher vegetation. As with all dinosaurs these teeth were constantly replaced throughout the animals entire life, although Iguanodon seems to have had only one spare replacement for each tooth at a time. Later forms of large ornithopods like the hadrosaurs would develop several replacement teeth. Iguanodon most probably also had cheeks that prevented food from falling out of the sides of the mouth as it was bearing mashed between the teeth. - Mmoires de l'Institut Royal des Sciences Naturelles de Belgique 178: 1–105. - On the anatomy of Iguanodon atherfieldensis (Ornithischia: Ornithopoda).
The front portion of the mouth was toothless which makes the front of the lower jaw resemble a scoop. The front of the upper jaw was similar to form a cropping beak edge, and both were likely covered by keratin to increase durability. Iguanodon was once thought to have a prehensile tongue like a giraffes, however study of the mouths hyoid bones that support the tongue are very robust, strongly suggesting that Iguanodon could only move its tongue to push food around inside its mouth. - Bulletin du Muse Royal d'Histoire Naturelle de Belgique 1: 161–180 - Louis Dollo - 1882. - Bulletin de L'institut Royal des Sciences Naturelles de Belgique Sciences de la Terre 56: 281–372 - David B. - A mass-accumulation of vertebrates from the Lower Cretaceous of Nehden (Sauerland), West Germany.
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These data indicate that skeletal preservation of fossil assemblages from deflation hollows can reflect an unexpectedly high proportion of porous, low density skeletal parts.
- Philosophical Transactions of the Royal Society 115: 179–186. - Quarterly Journal of the Geological Society of London 44: 46–61. Small mammals are represented by high proportions of non-mineralized, dense, skeletal parts, especially long bones. The exact discovery of Iguanodon has become something of a popular story, but with successive retelling some of the details have become a little blurred. The main area of this is just who discovered the first Iguanodon teeth, one Gideon Mantell, or his wife Mary Ann. Gideon Mantell was a practising obstetrician and the popular version of this story is that his wife Mary Ann discovered the first teeth in a quarry in Whiteman's Green, Sussex while he was visiting a patient in 1822. However a statement by Gideon Mantell himself in 1851 stated that it was he who had found the original teeth. Mantell's notes dating back to 1820 also show that he had discovered other material as well as different teeth from what we would call today a carnivorous theropod. There is also a mention of the discovery of teeth that seem to have belonged to a herbivore. This is why who discovered the Iguanodon teeth varies depending upon who is telling the story. - On the ornithoidichnites of the Wealden - Quarterly Journal of the Geological Society of London 10: 456–464. Germany Sex Guide advises where to find sex, working girls, prostitution, street hookers, brothels, red-light districts, sex shops, prostitutes, erotic massage parlors, strip clubs and escorts in Germany, Europe.Germany, (officially: the Federal Republic of Germany), (German: Bundesrepublik Deutschland) is the largest country in Central Europe.