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He suspected that the lizard might be venomous due to the grooves in the teeth. [8] The first drawing of a Gila monster by Baird, S. F. (1857) [8] The Gila monster is the largest extant lizard species native to North America north of the Mexican border. Its snout-to-vent length ranges from 26 to 36 cm (10 to 14 in). The tail is about 20% of the ...
The beaded lizards have one close living relative, the Gila monster (H. suspectum), as well as many extinct relatives in the Helodermatidae, whose genetic history may be traced back to the Cretaceous period. The genus Heloderma has existed since the Miocene Epoch, when H. texana ranged over most of North America. [5]
Cope ED. 1892. A critical review of the characters and variations of the snakes of North America. Proceedings of the U.S. National Museum 14(882): 589-694. Garman S. 1884. The reptiles and batrachians of North America. Memoires of the Museum of Comparative Zoology 8(3): 1-185. Murphy RW, Kovac V, Haddrath O, Oliver GS, Fishbein A. 1995.
[1] [2] They are often distinguished from poisonous animals, which instead passively deliver their toxins (called poison) to their victims upon contact such as through inhalation, absorption through the skin, or after being ingested. [1] [2] [3] The only difference between venomous animals and poisonous animals is how they deliver the toxins. [3]
Family Phrynosomatidae (horned lizards and spiny lizards) Dunes sagebrush lizard (Sceloporus arenicolus) VU; Coachella Valley fringe-toed lizard (Uma inornata) EN; Family Teiidae (whiptails) Little white whiptail (Aspidoscelis gypsi) VU; Family Scincidae (skinks) Florida sand skink (Neoseps reynoldsi) VU; Family Xantusiidae (night lizards)
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These lizards can hold their breath underwater for up to thirty minutes at a time. Found in southern China, this species is viviparous, with litters ranging from 2-7 individuals. This species has well-developed limbs and has a tail that is around 1.2 times the length of its body.
A Guide to the Rattlesnakes and other Venomous Serpents of the United States. Tempe, Arizona: Tricolor Books 129 pp. ISBN 978-0-9754641-3-7. (Crotalus oreganus helleri, pp. 25–27). Meek SE (1905). "An Annotated list of a Collection of Reptiles from Southern California and Northern Lower California". Field Columbian Museum Publication 104.