Unguiculariopsis lettaui  (Grumman) Coppins

Unlichenized parasitic lichenicolous fungus of Evernia prunastri.

      At first visible in the form of reddish-brown "galls" then in the form of apothecia, at first urceolate then in cupules, more or less sessile, rarely isolated and most often in small groups, blackish-brown, blackish but appearing pruinose grayish by tiny hairs with curved ends, wavy and supple margin sometimes covering the blackish-brown disc. Long claved asci, 30-40 x 7-8 µm, according to the literature, 40-45 x 7-9 µm according to our measurements. Spores single, hyaline, ovoid to oblong with two large guttules, 6-7 x 3-4 µm according to the literature and our measurements. Parasitic species of Evernia prunastri.