Polymeridium catapastoides

Polymeridium catapastoides is a species of corticolous (bark-dwelling) lichen in the family Trypetheliaceae. It has a widespread distribution, with occurrences reported in Australia, Malaysia, Thailand, Indonesia, Papua New Guinea, and Brazil. The lichen was formally described as a new species in 2013 by Dutch lichenologist André Aptroot. Resembling Polymeridium catapastum, P. catapastoides can be differentiated by its non-fluorescent thallus under ultraviolet light (UV−). The type specimen was collected in Cape Tribulation, Queensland (Australia), north of Daintree, growing on tree bark. The thallus of P. catapastoides is ecorticate, yellowish-white, and non-fluorescent under ultraviolet light. The ascomata measure 0.4–0.6 mm in diameter with a spherical centrum that is erumpent and solitary. The ostiole is apical or partly lateral, and the hamathecium is not inspersed with oil droplets. Each ascus contains 4–8 iodine-negative ascospores, which are 3-septate and measure 24–32 by 6–11 ......read more on Wikipedia.