Lichen Taxa held in MSC
| Genus | Species | N | MI | WI | S | Aus | E | Af | As | Notes | ||
| Abrothallus | parmeliarum | N | . | . | . | . | E | . | . | lichenicolous | ||
| Abrothallus | welwitzii | N | . | . | . | . | . | . | . | lichenicolous | ||
| Abrothallus | sp. | . | MI | . | . | . | . | . | . | lichenicolous | ||
| Absconditella | lignicola | N | MI | . | . | . | . | . | . | |||
| Acanthothecis | abaphoides | N | . | . | . | . | . | . | . | |||
| Acarospora | asperata | N | . | . | . | . | . | . | . | |||
| Acarospora | badiofusca | N | MI | . | . | . | E | . | . | |||
| Acarospora | bullata | N | . | . | . | . | . | . | . | |||
| Acarospora | californica | N | . | . | . | . | . | . | . | |||
| Acarospora | canadensis | N | MI | . | . | . | . | . | . | |||
| Acarospora | citrina | . | . | . | . | Aus | . | . | . | |||
| Acarospora | cervina | N | . | . | . | . | . | . | . | |||
| Acarospora | complanata | N | . | . | . | . | . | . | . | |||
| Acarospora | fuscata | N | MI | . | . | . | E | . | . | |||
| Acarospora | glaucocarpa | N | MI | . | . | . | E | . | . | |||
| Acarospora | heppii | N | . | . | . | . | . | . | . | |||
| Acarospora | hilaris | . | . | . | . | . | E | . | . | |||
| Acarospora | immersa | . | MI | . | . | . | . | . | . | |||
| Acarospora | lavicola | . | . | . | . | . | . | Af | . | |||
| Acarospora | massiliensis | . | . | . | . | . | E | . | . | |||
| Acarospora | oligospora | N | MI | . | . | . | . | . | . | |||
| Acarospora | molybdina | . | . | . | . | . | E | . | . | |||
| Acarospora | plinthina | . | . | . | . | . | E | . | . | |||
| Acarospora | peliscypha | . | . | . | . | . | E | . | . | |||
| Acarospora | radicata | N | . | . | . | . | . | . | . | |||
| Acarospora | rugulosa | . | . | . | . | . | E | . | . | |||
| Acarospora | schleicheri | N | . | . | S | . | . | Af | . | |||
| Acarospora | scotica | N | . | . | . | . | . | . | . | |||
| Acarospora | sinopica | . | . | . | . | . | E | . | . | |||
| Acarospora | smaragdula | N | . | . | S | . | E | . | . | |||
| Acarospora | strigata | N | . | . | . | . | E | . | . | |||
| Acarospora | umbilicata | . | . | . | . | . | E | . | . | |||
| Acarospora | sp. | N | . | WI | S | . | . | . | . | |||
| Acrocordia | cavata | N | MI | . | . | . | E | . | . | |||
| Acrocordia | conoidea | . | . | . | S | . | E | . | . | |||
| Acrocordia | megalospora | N | MI | . | . | . | . | . | . | |||
| Acrocordia | gemmata | . | . | . | . | . | E | . | . | |||
| Acrocordia | salweyi | . | . | . | . | . | E | . | . | |||
| Acrocordia | sp. | . | . | WI | . | . | . | . | . | |||
| Adelolecia | kolaensis | N | . | . | . | . | . | . | . | |||
| Agonimia | allobata | . | MI | . | . | . | . | . | . | |||
| Ahtiana | aurescens | N | MI | . | . | . | . | . | . | |||
| Ahtiana | pallidula | N | . | . | . | . | . | . | . | |||
| Alectoria | imshaugii | N | . | . | . | . | . | . | . | |||
| Alectoria | lata | N | . | . | . | . | . | . | As | |||
| Alectoria | mexicana | N | . | . | . | . | . | . | . | |||
| Alectoria | nigricans | N | . | . | S | Aus | E | . | . | |||
| Alectoria | ochroleuca | N | . | . | S | . | E | . | . | |||
| Alectoria | sarmentosa | subsp. | sarmentosa | N | . | WI | S | . | E | . | . | |
| Alectoria | sarmentosa | subsp. | vexillifera | N | . | . | . | . | E | . | . | |
| Alectoria | vancouverensis | N | . | . | . | . | . | . | . | |||
| Allantoparmelia | almquistii | N | . | . | . | . | . | . | . | |||
| Allantoparmelia | alpicola | N | . | . | . | . | E | . | . | |||
| Allocetraria | madreporiformis | N | . | . | . | . | . | . | . | |||
| Allocetraria | oakesiana | N | MI | . | . | . | . | . | . | |||
| Amandinea | coniops | N | . | . | . | . | E | . | . | syn. Buellia | ||
| Amandinea | dakotensis | N | MI | . | . | . | . | . | . | syn. Rinodina | ||
| Amandinea | leucomela | N | . | . | . | . | . | . | . | syn. Buellia | ||
| Amandinea | milliaria | N | MI | . | . | . | . | . | . | syn. Rinodina | ||
| Amandinea | placodimorpha | . | . | WI | . | . | . | . | . | syn. Buellia | ||
| Amandinea | polyspora | N | MI | . | S | . | . | . | . | syn. Buellia | ||
| Amandinea | punctata | N | MI | . | S | . | E | . | . | syn. Buellia | ||
| Amandinea | turgescens | N | . | . | . | . | . | . | . | syn. Buellia | ||
| Amygdalaria | consentiens | N | . | . | . | . | . | . | . | |||
| Amygdalaria | elegantior | N | . | . | . | . | . | . | . | |||
| Amygdalaria | paneola | N | . | . | . | . | . | . | . | |||
| Amygdalaria | pelobotryon | . | . | . | . | . | E | . | . | |||
| Anaptychia | ciliaris | var. | ciliaris | . | . | . | . | . | E | Af | . | |
| Anaptychia | ciliaris | var. | melanosticta | . | . | . | . | E | . | . | ||
| Anaptychia | isidiza | . | . | . | . | . | . | . | As | |||
| Anaptychia | palmulata | N | MI | . | . | . | . | . | As | |||
| Anaptychia | runcinata | . | . | . | . | . | E | . | . | |||
| Anaptychia | setifera | N | MI | . | . | . | . | . | . | |||
| Anaptychia | ulotrichoides | N | . | . | . | . | . | . | . | |||
| Anisomeridium | albisedum | N | . | . | . | . | . | . | . | |||
| Anisomeridium | ambiguum | N | . | WI | . | . | . | . | . | |||
| Anisomeridium | americanum | . | . | WI | . | . | . | . | . | |||
| Anisomeridium | anisolobum | N | . | WI | . | . | . | . | . | |||
| Anisomeridium | aureopunctatum | N | . | . | . | . | . | . | . | |||
| Anisomeridium | biforme | N | MI | . | S | Aus | E | . | . | |||
| Anisomeridium | carinthiacum | . | MI | . | . | . | . | . | . | |||
| Anisomeridium | infernale | . | . | WI | . | . | . | . | . | |||
| Anisomeridium | polypori | N | MI | . | S | . | . | . | . | |||
| Anisomeridium | subprostans | N | . | . | . | . | . | . | . | |||
| Anisomeridium | tamarindi | N | WI | . | . | . | . | . | ||||
| Anisomeridium | terminataum | . | . | WI | . | . | . | . | . | |||
| Anisomeridium | tuckerae | N | . | . | . | . | . | . | . | |||
| Anthracothecium | album | . | . | WI | . | . | . | . | . | ad int. | ||
| Anthracothecium | americanum | N | . | WI | . | . | . | . | . | |||
| Anthracothecium | antillarum | . | . | WI | . | . | . | . | . | ad int. | ||
| Anthracothecium | canellae-albae | N | . | . | . | . | . | . | . | |||
| Anthracothecium | clypeatum | . | . | WI | . | . | . | . | . | ad int. | ||
| Anthracothecium | cubanum | . | . | WI | . | . | . | . | . | ad int. | ||
| Anthracothecium | denudatum | N | . | WI | . | . | . | . | . | |||
| Anthracothecium | disporum | . | . | WI | . | . | . | . | . | ad int. | ||
| Anthracothecium | dryadis | . | . | WI | . | . | . | . | . | ad int. | ||
| Anthracothecium | duplicatum | . | . | WI | . | . | . | . | . | ad int. | ||
| Anthracothecium | impressum | . | . | WI | . | . | . | . | . | |||
| Anthracothecium | libricolum | N | . | . | . | . | . | . | . | ?mis-IDs for NA | ||
| Anthracothecium | nanum | N | . | . | . | . | . | . | . | |||
| Anthracothecium | pachycheilum | N | . | . | . | . | . | . | . | |||
| Anthracothecium | palmarum | . | . | . | S | . | . | . | . | |||
| Anthracothecium | paraguayense | . | . | WI | . | . | . | . | . | |||
| Anthracothecium | praelustre | N | . | WI | . | . | . | . | . | |||
| Anthracothecium | prasinum | N | . | . | . | . | . | . | . | |||
| Anthracothecium | staurosporum | N | . | . | . | . | . | . | . | |||
| Anthracothecium | subduplicans | . | . | WI | . | . | . | . | . | ad int. | ||
| Anthracothecium | subglobosum | N | . | . | . | . | . | . | . | |||
| Anthracothecium | sp. | . | . | WI | . | . | . | . | . | |||
| Anzia | colpodes | N | MI | . | . | . | . | . | . | |||
| Anzia | leucobatoides | . | . | . | . | . | . | . | As | |||
| Anzia | sp. | . | . | WI | . | . | . | . | . | |||
| Arctocetraria | andrejevii | N | . | . | . | . | . | . | . | |||
| Arctomia | delicatula | N | . | . | . | . | E | . | . | |||
| Arctoparmelia | centrifuga | N | . | . | . | . | E | . | . | |||
| Arctoparmelia | incurva | N | . | . | . | . | E | . | . | |||
| Arctoparmelia | separata | N | . | . | . | . | . | . | . | |||
| Arctoparmelia | subcentrifuga | N | . | . | . | . | . | . | . | |||
| Argopsis | friesiana | . | . | . | . | Aus | . | . | . | |||
| Argopsis | magaspora | . | . | . | . | Aus | . | . | . | |||
| Arthonia | accolens | . | . | WI | . | . | . | . | . | |||
| Arthonia | byssacea | . | MI | . | . | . | . | . | . | |||
| Arthonia | caesia | N | MI | . | . | . | . | . | . | |||
| Arthonia | chiodectella | N | . | . | . | . | . | . | . | |||
| Arthonia | cinereopruinosa | . | . | . | . | . | E | . | . | |||
| Arthonia | cinnabarina | N | . | . | . | . | E | . | . | |||
| Arthonia | circumtincta | . | . | WI | . | . | . | . | . | |||
| Arthonia | cyanea | . | . | WI | . | . | . | . | . | |||
| Arthonia | didyma | N | MI | . | . | . | . | . | . | |||
| Arthonia | diffusella | N | . | . | . | . | . | . | . | |||
| Arthonia | dispersa | N | . | . | . | . | . | . | . | |||
| Arthonia | dispersula | N | . | . | . | . | . | . | . | |||
| Arthonia | dispuncta | . | . | . | . | . | E | . | . | |||
| Arthonia | epiphyscia | . | . | . | S | . | . | . | . | lichenicolous | ||
| Arthonia | fuegiensis | . | . | . | S | . | . | . | . | ad int. | ||
| Arthonia | fuliginosa | . | . | . | . | . | E | . | . | |||
| Arthonia | glebosa | N | . | . | . | . | . | . | . | |||
| Arthonia | granosa | N | . | . | . | . | . | . | . | |||
| Arthonia | helvola | N | . | . | . | . | . | . | . | |||
| Arthonia | ilicina | N | . | . | S | . | E | . | . | |||
| Arthonia | lapidicola | N | . | . | . | . | E | . | . | |||
| Arthonia | leucopellaea | . | . | . | . | . | E | . | . | |||
| Arthonia | lobata | . | . | . | . | . | E | . | . | |||
| Arthonia | mediella | N | . | . | . | Aus | . | . | . | |||
| Arthonia | meridionalis | . | . | . | S | . | . | . | . | ad int. | ||
| Arthonia | minuta | . | . | . | . | . | E | . | . | |||
| Arthonia | mira | . | . | WI | . | . | . | . | . | |||
| Arthonia | muscigena | . | . | . | . | . | E | . | . | |||
| Arthonia | ochrodiscodes | N | . | . | . | . | . | . | . | |||
| Arthonia | patellulata | N | MI | . | . | . | . | . | . | |||
| Arthonia | phaeobaea | N | . | . | . | . | E | . | . | |||
| Arthonia | pruinata | N | . | . | . | . | . | . | . | |||
| Arthonia | pulveracea | . | . | . | S | . | . | . | . | |||
| Arthonia | punctiformis | N | MI | . | . | . | . | . | . | |||
| Arthonia | pyrrhula | N | . | . | . | . | . | . | . | |||
| Arthonia | radiata | N | MI | . | . | . | E | . | . | |||
| Arthonia | rubella | N | . | . | . | . | . | . | . | |||
| Arthonia | sexlocularis | N | . | . | . | . | . | . | . | |||
| Arthonia | siderea | N | . | . | . | . | . | . | . | |||
| Arthonia | spadacea | . | MI | . | . | Aus | E | . | . | |||
| Arthonia | subnebulosa | . | . | . | S | . | . | . | . | |||
| Arthonia | trilocularis | . | . | WI | . | . | . | . | . | |||
| Arthonia | turbata | . | . | . | S | . | . | . | . | |||
| Arthonia | vinosa | N | . | . | . | . | . | . | . | |||
| Arthonia | willeyi | . | MI | . | . | . | . | . | . | |||
| Arthonia | sp. | N | . | 250 | S | . | . | . | . | |||
| Arthopyrenia | adnex | var. | leptosperma | . | . | . | S | . | . | . | . | |
| Arthopyrenia | analepta | N | . | . | . | . | E | . | . | |||
| Arthopyrenia | antecellens | N | . | . | . | . | . | . | . | |||
| Arthopyrenia | ceresi | . | . | . | . | . | E | . | . | |||
| Arthopyrenia | cinchonea | N | . | WI | . | . | . | . | . | |||
| Arthopyrenia | cinereopruinosa | . | . | . | . | . | E | . | . | |||
| Arthopyrenia | confluens | N | . | . | . | . | . | . | . | |||
| Arthopyrenia | degelii | N | . | . | . | . | . | . | . | |||
| Arthopyrenia | leptosperma |