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GEOGRAPHICAL DISTRIBUTION:
Phrynosoma is found in western half of the United States and Central America.
CHARACTERS:
i) Phrynosoma is commonly known as horned – toad.
ii) It grows to a length of 12 cm.
iii) Body is much flattened and broadened and covered with larger and smaller strongly keeled scales.
iv) Dorsal crest is absent.
v) The under- ports are covered with small very regular keeled scales.
vi) Head has five spikes on each side
vii) Both the sexes have a long row of pores on the under surface of the thighs.
viii) Tongue is short and flat.
ix) Teeth are pleurodont.
x) Vertebrae are procoelous.
xi) Viviparous.
ECONOMIC IMPORTANCE:
i) They are sold as pets economically.
ii) They may lunge at humans if threatened.
