Lanzhousaurus is a genus of dinosaur. Lanzhousaurus lived in the Gansu region of what is now China during the Early Cretaceous (Barremian). A partial skeleton has been recovered. It was described by You, Ji and Li in 2005 and the type and only species is Lanzhousaurus magnidens.[1]

Temporal range: Lower Cretaceous, 130 Ma
Skeleton of Jintasaurus meniscus.JPG
Skeletal mount of Lanzhousaurus
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauria
Order: Ornithischia
Suborder: Ornithopoda
Clade: Styracosterna
Genus: Lanzhousaurus
You, Ji & Li, 2005
Type species
Lanzhousaurus magnidens
You, Ji & Li, 2005


The genus has been described as having "astonishingly huge teeth", among the largest for any herbivorous creature ever, which indicate it was a styracosternan iguanodont. The mandible, longer than one meter, suggests a very large size for the animal. Tooth enamel of this dinosaur was growing very rapidly.[2]


  1. ^ You, H.-L. (2005) Lanzhousaurus magnidens from the Lower Cretraceous of Gansu province, China: The largest-toothed herbivorous dinosaur in the world. JVP 26(3) Abstracts pp. 142
  2. ^ Celina A. Suarez, Hai-Lu You, Marina B. Suarez, Da-Qing Li & J. B. Trieschmann (2017). Stable Isotopes Reveal Rapid Enamel Elongation (Amelogenesis) Rates for the Early Cretaceous Iguanodontian Dinosaur Lanzhousaurus magnidens. Scientific Reports 7, Article number: 15319 (2017). doi:10.1038/s41598-017-15653-6