What type of reptile is a horned frog?

Horned lizards are a genus (Phrynosoma) of lizards which are the type genus of the subfamily Phrynosomatinae. The horned lizard has been affectionately called a "horny toad", or "horned frog", though they are not moist-skinned toads or frogs. The common names come from the lizard's flattened, rounded body and blunt snout, which make it resemble a toad or frog (Phrynosoma means "toad-bodied"), as well as its tendency, in common with larger true frogs and toads, to move sluggishly, making them easy to hand-catch.

They are totally adapted to desert areas. The spines on its back and sides are made from modified reptile scales which prevent the water loss through the skin, whereas the horns on the heads are true horns (i.e. they have a bony core). Of the 15 species of horned lizards in North America, eight are native to the United States. The largest-bodied and most widely distributed of the US species is the Texas horned lizard.