Reptilia

Phylum/Common Name	Class	Distinguishing features	examples
Reptile/Crawling- tiles	Reptilia	• lay eggs (protected by amnion) • reptiles incubate their eggs in sand, dirt or gravel while amphibians incubate their eggs solely in water • not mammal or bird • tetrapod vertebrate • ectotherm • scales (horny epidermis) creates a watertight seal and protects from drying out. This is the reason reptiles can live on land, unlike amphibians • dinosaurs were part of the reptile class before extinction •3 or 4 chambered heart •5 toes •lungs instead of gills (can breath on land)	Boa Constrictor <http://dangerousanimalswallpapers.blogspot.com/2013/01/cobra-snake-latest-hd-desktop.html> Crocodiles <http://www.serengetibook.com/crocodile-gallery/>

source of information: 

https://en.wikipedia.org/wiki/Reptile#Skin

http://www.animaldiversity.ummz.umich.edu

http://www.entomology.cornell.edu/cals/entomology