Giant horned lizard

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Giant horned lizard
Phrynosoma asio.jpg
Scientific classification edit
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Squamata
Suborder: Iguania
Family: Phrynosomatidae
Genus: Phrynosoma
P. asio
Binomial name
Phrynosoma asio
Cope, 1864[2]

The giant horned lizard (Phrynosoma asio) is a species of phrynosomatid lizard which is endemic to the Pacific coast of southern Mexico. It is the largest horned lizard and is also the most slender (it has a typical lizard-like appearance). Like all lizards, the giant horned lizard is cold-blooded, it is able to survive in the desert. The spines on its back and sides are made from modified scales, whereas the horns on its head are true horns (i.e., they have a bony core).


  1. ^ Luis Canseco-Marquez, Antonio Muñoz, André García, Paulino Ponce. (2013). Phrynosoma asio; the IUCN Red List of Threatened Species doi:10.2305/IUCN.UK.2013-2.RLTS.T198393A2524363.en
  2. ^ The Reptile Database.