Ht. Lumbsch et al., A REMARKABLE NEW SPECIES IN THE LICHEN GENUS PLACOPSIS FROM PAPUA-NEW-GUINEA (LICHENIZED ASCOMYCETES, AGYRIACEAE), Plant systematics and evolution, 185(3-4), 1993, pp. 285-292
Placopsis auriculata LUMBSCH & KASHIWADANI is described from Papua New
Guinea. This new species is characterized by the presence of campylid
ia-like helmet-shaped soralia and the presence of the gyrophoric acid
chemosyndrome. Hiascic acid is reported for the first time from the Ag
yriaceae. The distinction of that species from other sorediate species
of Placopsis is briefly discussed.