Stereocaulon paschale is host to some
lichenicolous fungi which infect various parts of the
thallus. Most of these fungi have a
Holarctic distribution. These fungi include: •
Arthonia stereocaulina, Infects the phyllocladia but rarely causes disease. •
Catillaria stereocaulorum, Mainly infects the phyllocladia, which can become swollen and dark. It is common in the Arctic. •
Cercidospora stereocaulorum, Infects phyllocladia and sometimes on stems, cephalodia and apothecia. •
Endococcus nanellus, Infects phyllocladia and sometimes on stems, cephalodia and apothecia. Often found in discolored apothecia but does probably not cause the discoloration. •
Lasiosphaeriopsis stereocaulicola, Usually found at the stem base which can turn brown but no other symptoms are known. •
Lichenopeltella stereocaulorum, Most often found on stems. This species was only discovered in 2010. •
Opegrapha stereocaulicola, Infects stems which may become darker. •
Phaeosporobolus alpinus, Commensal. Most commonly found on species of
Pertusaria or
Ochrolechia. •
Polycoccum trypethelioides, Produces galls on stem which change colour with time turning
cinnamon colour or brown. ==See also==