Lichen Taxa held in MSC
| Genus | Species | N | MI | WI | S | Aus | E | Af | As | Notes | ||
| Dacampia | hookeri | . | . | . | . | . | E | . | . | |||
| Dactylina | arctica | N | . | . | . | . | . | . | . | |||
| Dactylina | ramulosa | N | . | . | . | . | . | . | . | |||
| Dactylospora | inquilina | N | . | . | . | . | . | . | . | lichenicolous | ||
| Dactylospora | lobariella | N | . | . | . | . | . | . | . | lichenicolous | ||
| Dactylospora | rhyparizae | . | . | . | . | . | E | . | . | lichenicolous | ||
| Dactylospora | saxatils | N | . | . | . | . | E | . | . | lichenicolous | ||
| Dactylospora | stygia | . | MI | . | . | . | . | . | . | lichenicolous | ||
| Dactylospora | urceolata | N | . | . | . | . | . | . | . | lichenicolous | ||
| Degelia | atlantica | . | . | . | . | . | E | . | . | |||
| Degelia | duplomariginata | . | . | . | . | Aus | . | . | . | |||
| Degelia | flabellata | . | . | . | . | Aus | . | . | . | |||
| Degelia | gayana | . | . | . | S | Aus | . | . | . | |||
| Degelia | plumbea | . | . | . | . | . | E | . | . | |||
| Dendrisocaulon | calithamnium | . | . | . | S | . | . | . | . | |||
| Dendrisocaulon | intricatulum | N | . | . | . | . | . | . | . | |||
| Dendrisocaulon | umhausense | N | . | . | . | . | E | . | . | |||
| Dendrographa | leucophaea | N | . | . | . | . | . | . | . | |||
| Dendrographa | minor | N | . | . | . | . | . | . | . | |||
| Dermatiscum | catawbense | N | . | . | . | . | . | . | . | |||
| Dermatocarpon | arnoldianum | . | . | . | . | . | E | . | . | |||
| Dermatocarpon | caesium | var. | frigida | . | . | . | . | . | E | . | . | |
| Dermatocarpon | intestiniforme | N | . | . | . | . | . | . | . | |||
| Dermatocarpon | luridum | N | MI | . | . | . | E | . | . | |||
| Dermatocarpon | meiophyllizum | . | . | . | . | . | E | . | . | |||
| Dermatocarpon | miniatum | N | MI | . | . | . | E | . | . | |||
| Dermatocarpon | moulinsii | N | MI | . | . | . | . | . | . | |||
| Dermatocarpon | myogiense | . | . | . | . | . | . | . | As | |||
| Dermatocarpon | nigrum | . | . | . | S | . | . | . | . | |||
| Dermatocarpon | reticulatum | N | . | . | . | . | . | . | . | |||
| Dermatocarpon | rivulorum | . | . | . | . | . | E | . | . | |||
| Dermatocarpon | schaechtelinii | . | . | . | . | . | . | Af | . | |||
| Dermatocarpon | subcrustulosum | . | . | . | . | . | E | . | . | |||
| Dibaeis | absolutus | N | . | WI. | . | Aus | . | . | . | |||
| Dibaeis | arcuata | . | . | . | . | Aus | . | . | . | |||
| Dibaeis | baeomyces | . | . | WI | S | Aus | . | . | . | |||
| Dibaeis | fungoides | . | . | . | . | Aus | . | . | . | |||
| Dichosporidium | nigrocinctum | . | . | WI | . | . | . | . | . | |||
| Dichosporidium | boschianum | . | . | . | . | Aus | . | . | . | |||
| Dictiographa | sp. | . | . | WI | . | . | . | . | . | |||
| Dictyonema | glabratum | N | . | WI | S | . | . | . | . | |||
| Dictyonema | sericeum | N | . | WI | S | . | . | . | . | |||
| Dictyonema | spongiosum | N | . | . | . | . | . | . | . | |||
| Dictyonema | thelophora | . | . | . | . | . | . | . | As | |||
| Dimelaena | californica | N | . | . | . | . | . | . | . | |||
| Dimelaena | oreina | N | MI | . | . | . | E | . | . | |||
| Dimelaena | radiata | N | . | . | . | . | . | . | . | |||
| Dimelaena | tenuis | . | . | . | . | Aus | . | . | . | |||
| Dimelaena | thysanota | N | . | . | . | . | . | . | . | |||
| Dimerella | bacillifera | . | . | . | S | . | . | . | . | |||
| Dimerella | hypophylla | . | . | WI | . | . | . | . | . | |||
| Dimerella | lutea | N | MI | WI | S | . | . | . | As | |||
| Dimerella | pineti | N | MI | . | S | . | E | . | . | |||
| Dimerella | subzonata | . | . | . | . | . | . | . | As | |||
| Diploicia | canescens | N | . | WI | . | . | E | . | . | |||
| Diploschistes | actinostomus | N | . | WI | S | Aus | E | . | . | |||
| Diploschistes | aeneus | N | . | . | . | . | . | . | . | |||
| Diploschistes | aggregata | . | . | . | . | . | E | . | . | |||
| Diploschistes | almbornii | . | . | . | . | Aus | . | . | . | |||
| Diploschistes | bisporus | . | . | . | . | Aus | . | . | . | |||
| Diploschistes | chloroleum | . | . | WI | S | . | . | . | . | |||
| Diploschistes | cinereocaesius | . | . | WI | . | . | . | . | . | |||
| Diploschistes | euganeas | . | . | . | . | . | E | . | . | |||
| Diploschistes | gypsaceus | N | . | . | . | . | E | . | . | |||
| Diploschistes | gyrophoricus | . | . | . | . | Aus | . | . | . | |||
| Diploschistes | muscorum | N | MI | . | . | . | E | . | . | |||
| Diploschistes | muscorum | subsp. | bartlettii | . | . | . | . | Aus | . | . | . | |
| Diploschistes | ocellatus | . | . | . | . | Aus | E | . | . | |||
| Diploschistes | scruposus | N | MI | . | S | Aus | E | . | . | |||
| Diplotomma | alboatrum | N | MI | . | S | . | E | . | . | syn. Buellia | ||
| Diplotomma | nivalis | . | . | . | . | . | E | . | . | syn. Buellia | ||
| Diplotomma | penichra | N | . | . | . | . | . | . | . | syn. Buellia | ||
| Diplotomma | ventusum | N | . | . | . | . | E | . | . | syn. Buellia | ||
| Dirina | catalinariae | N | . | . | . | . | . | . | . | |||
| Dirina | catalinariae | f. | sorediata | N | . | . | . | . | . | . | . | |
| Dirina | massiliense | . | . | . | . | . | . | Af | . | |||
| Dirina | massiliense | f. | sorediata | . | . | . | . | . | E | . | . | |
| Dirinaria | aegialita | N | . | WI | S | Aus | . | . | . | |||
| Dirinaria | applanata | N | . | WI | S | Aus | . | . | . | |||
| Dirinaria | batavica | . | . | . | . | Aus | . | . | . | |||
| Dirinaria | confluens | . | . | . | . | Aus | . | . | . | |||
| Dirinaria | confusa | N | . | WI | . | . | . | . | . | |||
| Dirinaria | confusa | var. | saxicola | N | . | . | . | . | . | . | . | |
| Dirinaria | frostii | N | . | . | . | . | . | . | . | |||
| Dirinaria | papillulifera | . | . | WI | . | . | . | . | . | |||
| Dirinaria | picta | N | . | WI | S | Aus | . | . | As | |||
| Dirinaria | purpurascens | N | . | WI | S | . | . | . | . | |||
| Discothecium | acervatum | N | . | . | . | . | . | . | . | |||
| Distopyrenis | americana | N | . | . | . | . | . | . | . | |||
| Dolichocarpus | chilensis | . | . | . | S | . | . | . | . | |||
| Durietzia | crenulata | . | . | . | S | . | . | . | . |
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