Illosporiopsis christiansenii (B. L. Brady & D. Hawksw.) D. Hawksw.
Hobsonia christiansenii B. L. Brady & D. Hawksw.
Unlichenized Lichenicolous Ascomycota
This form is the anamorph (asexual stage) of this species, the sexual stage being unknown. It develops small heaps gall-like, 0.5-1.5 mm across (Sporodochia), containing masses of conidia, bright pink to fuschia-red. Conidia are arranged in spirals (helicospores), appearing as sausages in folded strings on a dish. Rare in our prospection area (or at least understated), on Physcia and notably on Physcia adscendens but also on other lichens. Not to be confused with Marchandiomyces corallinus less pink and made of granulose minute bulbs and, above all, with Marchandiomyces aurantiacus, more orange, surrounded by a pink necrotic zone and devoid of helicospores.*