Lambeosaurus

Lambeosaurus
	Live reconstruction of Lambeosaurus laticaudus
Temporal occurrence
	Upper Cretaceous ( Campanium )
	83.6 to 72 million years
Locations
	Dinosaur Provincial Park in Alberta ( Canada ); Baja California Norte ( Mexico );
Systematics
	Pelvic dinosaur (Ornithischia)
	Cerapoda
	Ornithopoda
	Iguanodontia
	Hadrosaurs (Hadrosauridae)
	Lambeosaurus
Scientific name
	Lambeosaurus
	Parks , 1922
species
	L. laticaudus (Morris, 1981); L. lambei (Parks, 1922); L. magnicristatus (Sternberg, 1935);

Lambeosaurus (" Lambes Lizard") is a genus of hadrosaurs , a species-rich group of bird's pelvis dinosaurs from the Upper Cretaceous ( Campanium ) of North America.

Fossils of two species ( L. lambei and L. magnicristatus ) have been found in the Judith River Group in Dinosaur Provincial Park in Alberta, Canada . These include almost 20 well-preserved skulls , some together with skeletons found in an anatomical context. The fossils include both adult and young animals. A skull and some skeletal parts of another species ( L. laticaudus ) were found in the El Gallo Formation in the Mexican state of Baja California Norte .

Features and systematics

Lambeosaurus is the eponymous genus of the taxon Lambeosaurinae , the group of hadrosaurs whose representatives wore a hollow crest formed from the nasal bone (nasal) and intermaxillary bone (premaxillary) on the skull. In Lambeosaurus , however, the cavity only took up a very small area of the bone crest. An outgrowth of the cheekbone (jugale) pointing towards the snout is triangular in cross section. The spoke (radius) was longer than the upper arm bone (humerus). Together with Corythosaurus , Hypacrosaurus and Parasaurolophus , Lambeosaurus forms a monophyletic clade compared to the basal Tsintaosaurus , in which these features are even less pronounced or absent. Lambeosaurus reached an average length of about 12 meters. However, some finds even indicate a length of 15 to 16 meters, making Lambeosaurus one of the largest hadrosaurs. The vertebral anatomy shows that the spine was mostly kept horizontal, that the animal, like hadrosaurs mostly, moved predominantly quadruped (four-legged).

literature

John R. Horner , David B. Weishampel , Catherine A. Forster: Hadrosauridae. In: David B. Weishampel, Peter Dodson , Halszka Osmólska (eds.): The Dinosauria . 2nd edition. University of California Press, Berkeley CA et al. 2004, ISBN 0-520-24209-2 , pp. 438-463.

Web links

Commons : Lambeosaurus - collection of images, videos and audio files

Individual evidence

^ Dougal Dixon : The World Encyclopedia of Dinosaurs & Prehistoric Creatures. Lorenz, London 2007, ISBN 978-0-7548-1730-7 , p. 345.

[dixon_08-1] Dougal Dixon : The World Encyclopedia of Dinosaurs & Prehistoric Creatures. Lorenz, London 2007, ISBN 978-0-7548-1730-7 , p. 345.