Miriquidica effigurata

About

Miriquidica effigurata is a species of rock-dwelling, crustose lichen in the family Lecanoraceae. It is found only on Campbell Island and the Auckland Islands south of New Zealand, where it grows on exposed rocks at high elevations in windswept grassland and peatland habitats. The lichen forms thick greyish crusts that crack into flat segments, and is distinguished by the presence of conspicuous black cephalodia, which are small structures containing cyanobacteria scattered between the segments. It is one of only two species in its genus known to develop these specialised nitrogen-fixing structures.

Summary from Wikipedia