Cladonia glacialis

Cladonia glacialis is a species of fruticose lichen in the family Cladoniaceae. Found in Iceland, it was described as a new species in 2009 by Hördur Kristinsson and Teuvo Ahti. The first author collected the type specimen in 1979 from Arnarfellsmúlar (a moraine in central Iceland) at an elevation of 600 m. This type locality is on the southeast side of Múlajökull, which is an outlet glacier of the Hofsjökull ice cap. Cladonia glacialis is only known to occur at the type locality. It contains fumarprotocetraric acid as its major lichen product. The authors suggest that the species belongs to the "supergroup" Cladonia (as defined by Stenroos et al. in 2002 ), and that it may be closely related to Cladonia phyllophora.