Lichen Taxa held in MSC
| Genus | Species | N | MI | WI | S | Aus | E | Af | As | Notes | ||
| Pilophorus | acicularis | N | . | . | . | . | . | . | . | |||
| Pilophorus | clavatus | N | . | . | . | . | . | . | . | |||
| Pilophorus | fibula | N | . | . | . | . | . | . | . | |||
| Pilophorus | nigricaulis | N | . | . | . | . | . | . | . | |||
| Pilophorus | robustus | N | . | . | . | . | E | . | . | |||
| Pilophorus | strumaticus | . | . | . | . | . | E | . | . | |||
| Placolecis | opeca | . | . | . | . | . | E | . | . | |||
| Placidiopsis | fernandezianum | . | . | . | S | . | . | . | . | Imsh. | ||
| Placidium | squamulosum | . | . | . | S | . | . | . | As | |||
| Placopsis | amabilis | N | . | . | . | . | . | . | . | |||
| Placopsis | cribellans | N | . | . | . | . | . | . | . | |||
| Placopsis | dureitzii | . | . | . | . | Aus | . | . | . | in ed. | ||
| Placopsis | gelida | N | . | . | . | . | E | . | . | |||
| Placopsis | macrophthalmia | . | . | . | S | . | . | . | . | |||
| Placopsis | trachyderma | var. | clavifera | . | . | . | . | Aus | . | . | . | |
| Placopsis | parellina | . | . | . | . | Aus | . | . | . | |||
| Placopsis | perrugosa | . | . | . | . | Aus | . | . | . | |||
| Placopsis | rhodocarpa | . | . | . | . | Aus | . | . | . | |||
| Placopsis | trochyderma | . | . | . | . | Aus | . | . | . | |||
| Placopsis | venata | . | . | . | . | Aus | . | . | . | in ed. | ||
| Placomaronea | sp. | . | . | . | S | . | . | . | . | |||
| Placynthiella | icmalea | N | . | . | . | Aus | E | . | . | |||
| Placynthiella | oligotropa | N | . | . | . | . | . | . | . | |||
| Placynthiella | hyporhoda | N | . | . | . | . | . | . | . | |||
| Placynthiella | uliginosa | N | MI | . | . | . | E | . | . | |||
| Placynthium | asperellum | N | MI | . | . | . | E | . | . | |||
| Placynthium | garovaglii | . | . | . | . | . | E | . | . | |||
| Placynthium | nigrum | N | MI | . | . | . | E | . | . | |||
| Placynthium | petersii | N | . | . | . | . | . | . | . | |||
| Placynthium | stenophyllum | N | . | . | . | . | . | . | . | |||
| Placynthium | stenophyllum | var. | isidiatum | N | . | . | . | . | . | . | . | |
| Placynthium | subradiatum | . | . | . | . | Aus | . | . | . | |||
| Plagiocarpa | antillarium | . | . | WI | . | . | . | . | . | sp. nov. | ||
| Plagiocarpa | grenadinensis | . | . | WI | . | . | . | . | . | sp. nov. | ||
| Platismatia | erosa | . | . | . | . | . | . | . | As | |||
| Platismatia | glauca | N | MI | . | S | . | E | . | . | |||
| Platismatia | herrei | N | . | . | . | . | . | . | . | |||
| Platismatia | lacunosa | N | . | . | . | . | . | . | . | |||
| Platismatia | norvegica | N | . | . | . | . | E | . | . | |||
| Platismatia | stenophylla | N | . | . | . | . | . | . | . | |||
| Platismatia | tuckermanii | N | MI | . | . | . | . | . | . | |||
| Plectocarpon | licheneum | . | . | . | . | . | E | . | . | |||
| Pleopsidium | chlorophanum | N | . | . | . | . | . | . | . | |||
| Pleopsidium | flavum | N | . | . | . | . | . | Af | . | |||
| Pleurosticta | acetabulum | N | . | . | . | . | E | . | . | not in NA | ||
| Pleurotrema | inspersoides | . | . | . | S | . | . | . | . | |||
| Pleurotrema | minima | . | . | . | S | . | . | . | . | |||
| Poeltiaria | coramandelica | . | . | . | . | Aus | . | . | . | |||
| Poeltiaria | corralensis | . | . | . | S | Aus | . | . | . | |||
| Poeltidea | perusta | . | . | . | S | . | . | . | . | |||
| Polyblastia | cupularis | N | . | . | . | . | E | . | . | |||
| Polyblastia | fulva | N | . | . | . | . | . | . | . | |||
| Polyblastia | guestphalica | . | . | . | . | . | E | . | . | |||
| Polyblastia | hyperborea | N | . | . | . | . | . | . | . | |||
| Polyblastia | melaspora | . | . | . | . | . | E | . | . | |||
| Polyblastia | nidulans | . | . | . | . | . | E | . | . | |||
| Polyblastia | sendtneri | N | . | . | . | . | . | . | . | |||
| Polyblastia | terrestris | . | . | . | . | . | E | . | . | |||
| Polyblastia | theleodes | N | . | . | . | . | . | . | . | |||
| Polyblastiopsis | caymenensis | . | . | WI | . | . | . | . | . | sp. nov. | ||
| Polyblastiopsis | fallaciuscula | . | . | WI | . | . | . | . | . | |||
| Polyblastiopsis | immersa | N | MI | . | . | . | . | . | . | sp. nov. | ||
| Polychidium | dendriscum | N | . | WI | S | . | E | . | . | |||
| Polychidium | muscicola | N | MI | WI | . | . | E | . | . | |||
| Polymeridium | albidum | N | . | . | . | . | . | . | . | |||
| Polymeridium | albocinereum | N | . | WI | . | . | . | . | . | |||
| Polymeridium | catapastum | N | . | WI | . | . | . | . | . | |||
| Polymeridium | contendens | N | . | . | . | . | . | . | . | |||
| Polymeridium | exasperatum | N | . | . | . | . | . | . | . | |||
| Polymeridium | proponens | N | . | . | . | . | . | . | . | |||
| Polymeridium | quinqueseptatum | N | . | . | . | . | . | . | . | |||
| Polymeridium | subcinereum | N | . | . | . | . | . | . | . | |||
| Polysporina | simplex | N | MI | . | . | . | E | . | . | |||
| Porina | africana | N | . | . | . | . | . | . | . | |||
| Porina | centrensis | N | . | . | . | . | . | . | . | |||
| Porina | cineriseda | . | . | WI | . | . | . | . | . | |||
| Porina | corrugata | . | . | . | . | Aus | . | . | . | |||
| Porina | epiphylla | N | . | WI | S | . | . | . | . | |||
| Porina | farinosa | . | . | . | . | Aus | . | . | . | |||
| Porina | heterospora | N | . | . | . | . | . | . | . | |||
| Porina | hibernica | N | . | . | . | . | . | . | . | not in NA | ||
| Porina | hyperleptalea | . | . | . | . | Aus | . | . | . | |||
| Porina | imitatrix | . | . | WI | . | . | . | . | . | |||
| Porina | lectissima | . | . | . | . | . | E | . | . | |||
| Porina | limbulata | . | . | WI | . | . | . | . | . | |||
| Porina | masafuerana | . | . | . | S | . | . | . | . | Imsh. | ||
| Porina | mastoidea | . | . | . | . | . | E | . | . | |||
| Porina | nucula | N | . | . | . | . | . | . | . | |||
| Porina | octomera | N | . | WI | . | . | . | . | . | |||
| Porina | olivacea | . | . | . | . | . | E | . | . | |||
| Porina | oxneri | . | . | . | . | . | E | . | . | |||
| Porina | pacifica | N | . | . | . | . | . | . | . | |||
| Porina | phyllogena | . | . | WI | . | . | . | . | . | |||
| Porina | platypoda | . | . | WI | . | . | . | . | . | |||
| Porina | rhaphidosperma | N | . | . | . | . | . | . | . | |||
| Porina | rufocarpella | . | . | . | S | . | . | . | . | |||
| Porina | rufula | . | . | WI | . | . | . | . | . | |||
| Porina | skottsbegii | . | . | . | S | . | . | . | . | Imsh. | ||
| Porina | tetramera | . | . | . | . | Aus | . | . | . | |||
| Porocyphus | sp. | . | . | . | S | . | . | . | . | |||
| Porpidia | albocaerulescens | N | . | . | . | . | E | . | . | |||
| Porpidia | austroshetlandica | . | . | . | . | Aus | . | . | . | |||
| Porpidia | crustulata | N | MI | . | . | Aus | E | . | . | |||
| Porpidia | flavocaerulescens | N | . | . | . | . | E | . | . | |||
| Porpidia | macrocarpa | N | MI | . | S | . | E | . | . | |||
| Porpidia | platycarpoides | . | . | . | . | . | E | . | . | |||
| Porpidia | skottsbergiana | . | . | . | . | Aus | . | . | . | |||
| Porpidia | speirea | N | . | . | . | . | E | . | . | |||
| Porpidia | tahawasiana | N | . | . | . | . | . | . | . | |||
| Porpidia | tuberculosa | N | . | . | S | . | E | . | . | |||
| Protoblastenia | rupestris | N | MI | . | . | . | . | . | . | |||
| Protopannaria | alicornis | . | . | . | . | Aus | . | . | . | |||
| Protoparmelia | atriseda | . | . | . | . | . | E | . | . | |||
| Protoparmelia | badia | N | . | . | . | Aus | E | . | . | |||
| Protoparmelia | cupreobadia | N | . | . | . | . | . | . | . | |||
| Protoparmelia | nephaea | N | . | . | . | . | . | . | . | |||
| Protoparmelia | ?montegnei | N | . | . | . | . | . | . | . | |||
| Protoparmelia | picea | . | . | . | . | . | E | . | . | |||
| Protothelenella | corrosa | . | . | . | . | . | E | . | . | |||
| Protousnea | alectoroides | . | . | . | S | . | . | . | . | |||
| Protousnea | dusenii | . | . | . | S | . | . | . | . | |||
| Protousnea | magellanica | . | . | . | S | . | . | . | . | |||
| Protousnea | malacea | . | . | . | S | . | . | . | . | |||
| Protousnea | poeppigii | . | . | . | S | . | . | . | . | |||
| Pseudephebe | minuscula | N | . | . | . | . | E | . | . | |||
| Pseudephebe | pubescens | N | . | . | . | . | E | . | . | |||
| Pseudevernia | cladonia | N | . | WI | . | . | . | . | . | |||
| Pseudevernia | consocians | N | MI | . | . | . | . | . | . | |||
| Pseudevernia | furfuracea | . | . | . | . | . | E | . | . | |||
| Pseudevernia | furfuracea | var. | ceratea | . | . | . | . | . | E | . | . | |
| Pseudevernia | intensa | N | . | . | . | . | . | . | . | |||
| Pseudocyphellaria | anomala | N | . | . | . | . | . | . | . | |||
| Pseudocyphellaria | anthraspis | N | . | . | . | . | . | . | . | |||
| Pseudocyphellaria | ardesiaca | . | . | . | . | Aus | . | . | . | |||
| Pseudocyphellaria | argyracea | . | . | . | . | . | . | . | As | |||
| Pseudocyphellaria | aurata | N | . | WI | S | Aus | . | . | As | |||
| Pseudocyphellaria | australensis | . | . | . | S | . | . | . | . | |||
| Pseudocyphellaria | bartlettii | . | . | . | . | Aus | . | . | . | |||
| Pseudocyphellaria | billardiarei | . | . | . | . | Aus | . | . | . | |||
| Pseudocyphellaria | berberina | . | . | . | S | Aus | . | . | . | |||
| Pseudocyphellaria | carpoloma | . | . | . | . | Aus | . | . | . | |||
| Pseudocyphellaria | ceriacea | . | . | . | . | Aus | . | . | . | |||
| Pseudocyphellaria | chloroleuca | . | . | . | . | Aus | . | . | . | |||
| Pseudocyphellaria | cinnamomea | . | . | . | . | Aus | . | . | . | |||
| Pseudocyphellaria | clathrata | . | . | WI | . | . | . | . | As | |||
| Pseudocyphellaria | coerulescens | . | . | . | S | Aus | . | . | . | |||
| Pseudocyphellaria | colensoi | . | . | . | . | Aus | . | . | . | |||
| Pseudocyphellaria | colorata | . | . | . | . | Aus | . | . | . | |||
| Pseudocyphellaria | coriacea | . | . | . | . | Aus | . | . | . | |||
| Pseudocyphellaria | coronata | . | . | . | . | Aus | . | . | . | |||
| Pseudocyphellaria | coriifolia | . | . | . | S | . | . | . | . | |||
| Pseudocyphellaria | crocata | N | . | WI | S | Aus | E | . | As | |||
| Pseudocyphellaria | corcatoides | . | . | . | . | . | . | . | As | |||
| Pseudocyphellaria | desfontainii | . | . | . | . | . | . | . | As | |||
| Pseudocyphellaria | degelii | . | . | . | . | Aus | . | . | . | |||
| Pseudocyphellaria | diplomorpha | . | . | . | . | . | . | . | As | |||
| Pseudocyphellaria | dissimilis | . | . | . | . | Aus | . | . | . | |||
| Pseudocyphellaria | divulsa | . | . | . | S | . | . | . | . | |||
| Pseudocyphellaria | dissecta | . | . | . | S | . | . | . | . | |||
| Pseudocyphellaria | endochrysa | . | . | WI | S | . | . | . | . | |||
| Pseudocyphellaria | episticta | . | . | . | . | Aus | . | . | . | |||
| Pseudocyphellaria | exanthematica | . | . | . | S | . | . | . | . | |||
| Pseudocyphellaria | faveolata | . | . | . | S | Aus | . | . | . | |||
| Pseudocyphellaria | fimbriata | . | . | . | . | Aus | . | . | . | |||
| Pseudocyphellaria | flavicans | N | . | . | S | Aus | . | . | . | |||
| Pseudocyphellaria | freycinetii | . | . | . | S | . | . | . | . | |||
| Pseudocyphellaria | gilva | . | . | . | S | . | . | . | . | |||
| Pseudocyphellaria | glabra | . | . | . | S | Aus | . | . | . | |||
| Pseudocyphellaria | granulata | . | . | . | S | Aus | . | . | . | |||
| Pseudocyphellaria | hawaiiensis | N | . | . | . | . | . | . | . | |||
| Pseudocyphellaria | hirsuta | . | . | . | S | . | . | . | . | |||
| Pseudocyphellaria | homoeophylla | . | . | . | . | Aus | . | . | . | |||
| Pseudocyphellaria | imshaugii | . | . | . | S | . | . | . | . | |||
| Pseudocyphellaria | intricata | . | . | WI | S | Aus | E | . | As | |||
| Pseudocyphellaria | knightii | . | . | . | . | Aus |