Lithothelium bermudense

About

Lithothelium bermudense is a species of lichen in the family Pyrenulaceae. The lichen grows within the surface layers of limestone (endolithic), appearing as small pink to pale brown spots, and is known only from coastal forests in Bermuda. It was discovered in 2007 at the Walsingham Nature Reserve and formally described as a new species in 2016. The species is distinguished from related lichens by the diamond-shaped inner chambers of its ascospores, and its preference for limestone.

Summary from Wikipedia