Squamarina is a genus of lichens currently placed in the family Stereocaulaceae, although it has recently been suggested that it may belong in the family Ramalinaceae. The genus has a widespread distribution, and contains 28 species. They form patches of radiating lobes or overlapping scales, with a well-developed upper cortex and no lower cortex. They grow on calcareous soil and rocks. Squamarina lentigera can be used to make a yellow dye.