Australiaena streimannii

Australiaena is a fungal genus in the family Caliciaceae. It is a monospecific genus, containing the single species Australiaena streimannii, a crustose lichen. It occurs in northern Australia and Papua New Guinea, where it grows on silica-rich rocks. The genus was proposed in 1997 and named to reflect both its Australasian distribution and its superficial resemblance to the genus Dimelaena. The lichen forms variable-coloured crusts, ranging from whitish to grey, ochre or brown, with margins that often show distinctive radiating folds. It is distinguished from similar genera by its thread-like asexual spores and the unusual way its sexual spores (ascospores) develop....read more on Wikipedia.