Search results
Results From The WOW.Com Content Network
Skulls of the three species compared: P. perotorum (with inaccurate epiparietal placement), P. canadensis, and P. lakustai Pachyrhinosaurus canadensis, was described in 1950 by Charles Mortram Sternberg based on the holotype incomplete skull NMC 8867, and the paratype incomplete skull NMC 8866, which included the anterior part of the skull but was lacking the right lower mandible, and the "beak".
The clade Ceratopsidae was in 1998 defined by Paul Sereno as the group including the last common ancestor of Pachyrhinosaurus and Triceratops; and all its descendants. [17] In 2004, it was by Peter Dodson defined to include Triceratops, Centrosaurus, and all descendants of their most recent common ancestor. [18]
Triceratops (/ t r aɪ ˈ s ɛr ə t ɒ p s / try-SERR-ə-tops; [1] lit. ' three-horned face ') is a genus of chasmosaurine ceratopsian dinosaur that lived during the late Maastrichtian age of the Late Cretaceous period, about 68 to 66 million years ago in what is now western North America.
A chasmosaurine ceratopsid that may be a specimen of Triceratops. †Ojoceratops †Ojoceratops fowleri; 68 Ma Ojo Alamo Formation, New Mexico, USA A chasmosaurine ceratopsid, possibly synonymous with Triceratops or Eotriceratops. †Pachyrhinosaurus †Pachyrhinosaurus canadensis †Pachyrhinosaurus lakustai †Pachyrhinosaurus perotorum
Raymond the Triceratops: Red Phantom Triceratops: Late Cretaceous (Maastrichtian, 68-66 million years ago) Roar [39] Naturhistorisk museum: Triceratops Name comes from donor of specimen. Ruben's Triceratops UCMP 113697 [13] University of California Museum of Paleontology: Triceratops: Late Cretaceous (Maastrichtian, 68-66 million years ago)
Centrosaurinae (from the Greek, meaning "pointed lizards") is a subfamily of ceratopsid, a group of large quadrupedal ornithischian dinosaur.Centrosaurine fossil remains are known primarily from the northern region of Laramidia (modern day Alberta, Montana, and Alaska) but isolated taxa have been found in China and Utah as well.
One exceptionally large specimen later became its own genus, Titanoceratops, due to its more derived morphology, similarities to Triceratops, and lack of unique characteristics shared with Pentaceratops. [2] [3] Pentaceratops was about 5.5–6 meters (18–20 ft) long, and has been estimated to have weighed around 2.5 metric tons (2.8 short tons).
The nasal horn was low, situated above the nostril and slightly recurved. It had a narrow rear edge and a transversely flattened point. The horns above the eyes were forward-curving and have been estimated at 80 cm (2.6 ft) long. The lower base of these horns was narrow and vertically directed, which with Triceratops is a juvenile trait. Three ...