Images for Chapter 12 Dinosaurs
Cladogram of Dinosauria: Image by Tom Holtz, University of Maryland
Late Triassic basal theropods from Argentina:
The other theropods, (collectively called tetanurans, separated early into the allosaurs (massive, powerful predators) and the lighter and more agile coelurosaurs.
Cladogram of coelurosaurs : Image by Tom Holtz, University of Maryland
Compsognathus, an early basal coelurosaur.
Cladogram of 'eumaniraptors' Image by Tom Holtz, University of Maryland.
A little theropod, probably a young maniraptor, from Italy, Scipionyx, is beautifully preserved. (This specimen has been called "Skippy" -- irresistible!).
Within coelurosaurs, one lineage of small, agile carnivores includes the birds (Chapter 13) and dromaeosaurs.
Sinovenator, a little theropod dinosaur from China, described in 2002.
Field Museum, Chicago.
Mononykus.a bird-like theropod from Mongolia, placed within a group called the alvarezsaurids. I write in the book that I suspect it operated rather like a megapod, for example, the brush turkey of Queensland, Australia.
Ornithomimids are the so-called ostrich dinosaurs.
Ornitholestes drawing Paul Olsen's Earthscape site.
Large theropods from the Cretaceous of Gondwana
Giganotosaurus at the Academy of Natural Sciences in Philadelphia, which proudly displays its specimen.
A new genus, related to Giganotosaurus, is claimed as the largest theropod: Picture from BBC News OnLine, March 13, 2000 (with Phil Currie, for scale and authenticity!).
Rajasaurus, from the latest Cretaceous of India.
Carcharodontosaurus from North Africa.
Incisivosaurus, a gnawing oviraptosaur.
No-one properly understands Therizinosaurs yet. They are theropods, but evolved toward a vegetarian life style.
Abelisaurs, theropod dinosaurs that flourished in Gondwanaland, in parallel with the dominantly Laurasian coelurosaurs.
The latest new abelisaurid is Masiakasaurus, from Madagascar. (Press release from NSF).
Masiakasaurus head with projecting teeth. National Geographic News, 2001
Cladogram of ornithischians. Figure 12.12.
Early and basal ornithischians
Cladogram of marginocephalians Image by Tom Holtz, University of Maryland
Thyreophora: Stegosaurs and Ankylosaurs
Cladogram of sauropodomorphs. Image by Tom Holtz, University of Maryland
The earliest sauropod: from the late Triassic of South Africa. National Geographic News, July 10, 2003.
Cladogram of neosauropods. Image by Tom Holtz, University of Maryland
Skull of Diplodocus, from Marsh. Figure 12.20.
Skeleton of Diplodocus
Diplodocid skulls: Barosaurus, Apatosaurus, Dicraeosaurus Paul Olsen's Earthscape site.
Drawing of Brachiosaurus and Brachiosaurus skull Paul Olsen's Earthscape site.
Camarasaurus drawing. Paul Olsen's Earthscape site.
Skull of Camarasaurus, from Marsh. Figure 12.21.
Rapetosaurus from Madagascar. NSF news release, 2001.
Rapetosaurus, skeleton reconstruction NSF news release, 2001.
Paralititan, a titanosaur from Egypt
Even a cautious person must admit that well-documented sauropod body lengths are over 100 feet and weights are at least 50 tons. For example, Seismosaurus
Dinosaur Paleobiology: Life at Large Size
Posture and Habitat
Growth curve for Tyrannosaurus. NOTE: this is in Science, November 4, 2004, so may not be freely available until some time in 2005.
Slow-growing dinosaur bone. The caption says it is a "rib-like" bone from Deinonychus. NOTE: this is in Science, November 4, 2004, so may not be freely available until some time in 2005.
Fast-growing dinosaur bone. A leg bone from Troodon. NOTE: this is in Science, November 4, 2004, so may not be freely available until some time in 2005.
Dinosaur nostrils may have been reconstructed in the wrong place. New Scientist
Eggs and Nests
BROWSE THIS: Dino Russ's dinosaur egg site, with many links
Were Dinosaurs Warm-Blooded?
Feathers on theropod dinosaurs
Reconstruction of Dilong, the feathery tyrannosaur. National Geographic News
Skeletal features of Dilong, the feathery tyrannosaur. National Geographic News
Skull of Dilong, the feathery tyrannosaur. National Geographic News
Feathered dromaeosaur . National Geographic News, 2001
Feathered juvenile dromaeosaur. Natural History magazine.
Feathered juvenile dromaeosaur Natural History magazine.
Shuvuuia from Mongolia. National Geographic News
Sinosauropteryx. From the Peabody Museum, Yale.
Sinosauropteryx skull with teeth. From the Peabody Museum, Yale.
Juvenile Sinosauropteryx. From the Peabody Museum, Yale.
Dramatic painting of Sinosauropteryx by Luis Rey
Another Luis Rey painting of Sinosauropteryx
Protarchaeopteryx. From the Peabody Museum, Yale.
Caudipteryx. From the Peabody Museum, Yale.
Caudipteryx tail with feathers. From the Peabody Museum, Yale.
Model of Caudipteryx. National Geographic
But Archaeoraptor was a fake. BBC News OnLine.
Convincing feathers on a dinosaur: great images
Dinosaur respiration: they could breathe while they ran