Scinax alter, the Crubixa snouted treefrog, is a species of frog in the family Hylidae endemic to Brazil.

[3] Scientists distinguish this frog from related species by the bright white stripes, lined with dark brown, down the sides of its body.

It also has a dark brown intraorbital blotch in the shape of an inverted triangle.

It has small dark brown rostral stripes in front of its eyes.

Some of them live further away from the ocean in the Rio Doce valley in Minas Gerais.