Myriotrema Grandisporum
''Myriotrema grandisporum'' is a species of corticolous (bark-dwelling) lichen in the family Graphidaceae. Found in Eastern Thailand, it was formally described as a new species in 2002 by lichenologists Natsurang Homchantara and Brian J. Coppins. The type specimen was collected by the first author in Khao Yai National Park ( Nakhon Ratchasima Province) at an elevation of . It is only known to occur at the type locality. The lichen has a shiny, finely warted (verruculose) thallus with a poorly developed cortex and a white medulla. Its ascospores are thin-walled, somewhat translucent to brown, and spindle-shaped (fusiform), typically measuring 204.5–252.5 long by 17.5–25.5 μm wide. They have a transverse septum and contains from 45 to 49 locules (internal spaces). The lichen contains norstictic acid, a secondary compound that is rare in the genus ''Myriotrema ''Myriotrema'' is a genus of lichen-forming fungi in the family Thelotremataceae. Species *'' Myrio ...
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