The most noticeable feature was the cranial crest, which protruded from the rear of the head and was made up of the premaxilla and nasal bones. walkeri, showing uniform tubercle-like scales but no larger structures. The neural spines of the vertebrae were tall, as was common in lambeosaurines tallest over the hips, they increased the height of the back. It probably preferred to forage for food on four legs, but ran on two. Like other hadrosaurids, it was able to walk on either two legs or four. The upper arm and pelvic bones were also heavily built. walkeri and is robust for its length when compared to other hadrosaurids. The thighbone measures 103 centimeters (3.38 ft) long in P. Its single known forelimb was relatively short for a hadrosaurid, with a short but wide shoulder blade. Its weight is estimated at 2.5 tonnes (2.7 tons). tubicen is over 2.0 meters (6.6 ft) long, indicating a larger animal. Its skull is about 1.6 meters (5.2 ft) long, including the crest, whereas the type skull of P. walkeri is estimated at 9.5 meters (31 ft). 4.2.2 Rejected hypotheses about functionĪs is the case with most dinosaurs, the skeleton of Parasaurolophus is incompletely known.4.2.1 Differences between species and growth stages.It is one of the rarer duckbills, being known from only a handful of good specimens. The crest has been much discussed by scientists the consensus is that major functions included visual recognition of both species and sex, acoustic resonance, and thermoregulation. Charonosaurus from China, which may have been its closest relative, had a similar skull and potentially a similar crest. This genus is known for its large, elaborate cranial crest, which at its largest forms a long curved tube projecting upwards and back from the skull. Parasaurolophus is a hadrosaurid, part of a diverse family of Cretaceous dinosaurs known for their range of bizarre head adornments. It was first described in 1922 by William Parks from a skull and partial skeleton in Alberta. Remains are known from Alberta, Canada, and New Mexico and Utah, USA. It was a herbivore that walked both as a biped and a quadruped. Parasaurolophus (pronounced / ˌpærəsɔˈrɒləfəs/ PARR-ə-saw-ROL-ə-fəs, commonly also / ˌpærəˌsɔrəˈloʊfəs/ PARR-ə-SAWR-ə-LOH-fəs meaning "near crested lizard" in reference to Saurolophus) commonly shortened as Parasaur is a genus of ornithopod dinosaur from the Late Cretaceous Period of what is now North America, about 83-73 million years ago. "Paralophosaurus" Martin, 2014 (lapsus calami).† Parasaurolophus walkeri (Parks, 1922).† Parasaurolophus tubicen ( Wiman, 1931).† Parasaurolophus cyrtocristatus ( Ostrom, 1961).
0 kommentar(er)
