Classification:

• Phylum: Chordata
• Class: Reptilia
• Order: Squamata
• Genus: Phrynosoma

Comments:

1. 1. Phrynosoma is commonly known as horned-toad.
2. 2. Body is much flattened and covered with larger and smaller strongly keeled scales.
3. 3. The underpants are covered with small very regular keeled scales.
4. 4. The color of the upper part is a mixture of yellow, grey, brown and black.
5. 5. Both the sexes have a long row of pores on the under surface of the thighs.
6. 6. Tongue is short, fleshy and protrusible.
7. 7. Teeth are pleurodont or homodont.
8. 8. Vertebrae are procoelous.
9. 9. Viviparous.
10. 10. Phrynosoma is found in western half of the United States and central America.
11. Phrynosoma cornutum ranges from Illinois through Kansas and Texas to northern
12. Mexico.

Source:

1. Practical Zoology Vertebrates by S.S.Lal. 2. A Manual of Practical Zoology Chordates by Dr. P.S. Verma.