A new species of Porina (lichenized Ascomycota, Porinaceae) from Tasmania

Porina australis sp.nov. (lichenized Ascomycota, Porinaceae) is described from seasonally inundated, siliceous rocks in the Frankland River, north-western Tasmania, Australia. It has a thin, medium yellow-brown to dark rusty red-brown, rimose to areolate thallus, prominent, medium-sized, outwardly blackish perithecia that are mainly orange-brown within, a comparatively thick, pale excipulum and fusiform or narrowly oblong, 7(-9)-septate ascospores of 37-65 x 5-8 mu m.