Lichen Taxa held in MSC
| Genus | Species | N | MI | WI | S | Aus | E | Af | As | Notes | ||
| Gassicurtia | catasema | N | . | . | . | . | . | . | . | syn. Buellia | ||
| Gassicurtia | vernicoma | N | . | . | . | . | . | . | . | syn. Buellia | ||
| Glossodium | japponica | . | . | . | . | . | . | . | As | |||
| Glyphis | cicatricosa | N | . | WI | . | . | . | . | . | |||
| Glypholecia | scabra | N | . | . | . | . | . | . | . | |||
| Gomphillus | americanus | N | . | . | . | . | . | . | . | |||
| Gomphillus | calycioides | . | . | WI | S | . | E | . | . | |||
| Graphina | anguina | . | . | . | . | . | E | . | . | |||
| Graphina | antillarum | . | . | WI | . | . | . | . | . | |||
| Graphina | chlorocarpa | . | . | WI | . | . | . | . | . | |||
| Graphina | colliculosa | . | . | WI | . | . | . | . | . | |||
| Graphina | collospora | . | . | WI | . | . | . | . | . | |||
| Graphina | confluens | . | . | WI | . | . | . | . | . | |||
| Graphina | fernandezianum | . | . | . | S | . | . | . | . | Imsh. | ||
| Graphina | incrustans | N | . | WI | . | . | . | . | . | |||
| Graphina | leuconephela | N | . | . | . | . | . | . | . | |||
| Graphina | marcescens | . | . | WI | . | . | . | . | . | |||
| Graphina | mendex | N | . | . | . | . | . | . | . | mis-IDs for NA | ||
| Graphina | mexicana | N | . | . | . | . | . | . | . | |||
| Graphina | ?nuda | . | . | WI | . | . | . | . | . | |||
| Graphina | platyleuca | . | . | WI | . | . | . | . | . | |||
| Graphina | plaurispora | . | . | WI | . | . | . | . | . | |||
| Graphina | ruiziana | . | . | . | . | . | E | . | . | |||
| Graphina | subvirginalis | N | . | . | . | . | . | . | . | |||
| Graphina | virginea | N | . | WI | . | . | . | . | . | |||
| Graphina | columbina | N | . | . | . | . | . | . | . | |||
| Graphina | scolectis | N | . | . | . | . | . | . | . | |||
| Graphis | adpressa | . | . | WI | . | . | . | . | . | |||
| Graphis | afzelii | N | . | . | . | . | . | . | . | |||
| Graphis | anfractuosa | N | . | . | . | . | . | . | . | |||
| Graphis | anguilliformis | N | . | WI | . | . | . | . | . | |||
| Graphis | assimilis | N | . | . | . | . | . | . | . | |||
| Graphis | insidiosa | N | . | . | . | . | . | . | . | |||
| Graphis | botryosa | N | . | . | . | . | . | . | . | |||
| Graphis | caesiella | N | . | . | . | . | . | . | . | |||
| Graphis | chrysocarpa | . | . | WI | . | . | . | . | . | |||
| Graphis | comma | . | . | WI | . | . | . | . | . | |||
| Graphis | compailis | . | . | . | S | . | . | . | . | |||
| Graphis | dendritica | N | . | . | . | . | . | . | . | |||
| Graphis | desquamescens | . | . | WI | . | . | . | . | . | |||
| Graphis | dumastioides | . | . | WI | . | . | . | . | . | |||
| Graphis | elegans | N | . | . | . | . | E | . | . | |||
| Graphis | glaucopsis | N | . | . | . | . | . | . | . | |||
| Graphis | glaucescens | . | . | WI | . | . | . | . | . | |||
| Graphis | grammatica | N | . | . | . | . | . | . | . | |||
| Graphis | grammatis | N | . | WI | . | . | . | . | . | |||
| Graphis | implicata | N | . | . | . | . | . | . | . | |||
| Graphis | intricata | N | . | . | . | . | . | . | . | |||
| Graphis | lactea | . | . | WI | . | . | . | . | . | |||
| Graphis | leptocarpa | . | . | WI | . | . | . | . | . | |||
| Graphis | librata | . | . | WI | . | . | . | . | . | |||
| Graphis | longula | . | . | WI | . | . | . | . | . | |||
| Graphis | lumbricina | . | . | WI | . | . | . | . | . | |||
| Graphis | olivacea | . | . | WI | . | . | . | . | . | |||
| Graphis | rigidula | N | . | WI | . | . | . | . | . | |||
| Graphis | rimulosa | . | . | WI | . | . | . | . | . | |||
| Graphis | peralbida | N | . | . | . | . | . | . | . | |||
| Graphis | scripta | N | MI | . | . | . | E | . | . | |||
| Graphis | ?substriatula | N | . | . | . | . | . | . | . | |||
| Graphis | tachygrapha | . | . | WI | . | . | . | . | . | |||
| Graphis | tenella | N | . | . | S | . | . | . | . | |||
| Graphis | tritacea | . | . | WI | . | . | . | . | . | |||
| Graphis | turgidula | . | . | WI | . | . | . | . | . | |||
| Graphis | turbulenta | N | . | . | . | . | . | . | . | |||
| Graphis | spp. | . | . | 350 | . | . | . | . | . | |||
| Gyalecta | fernandezianum | . | . | . | S | . | . | . | . | Imsh. | ||
| Gyalecta | skottsbergii | . | . | . | S | . | . | . | . | |||
| Gyalecta | jenensis | . | . | . | . | . | E | . | . | |||
| Gyalecta | truncigena | N | MI | . | . | . | . | . | . | |||
| Gyalecta | ulmi | . | . | . | . | . | E | . | . | |||
| Gyalectidium | aspidotum | N | . | . | . | . | . | . | . | not in NA | ||
| Gyalectidium | filicinum | N | . | WI | S | . | . | Af | . | |||
| Gyalectidium | melmothrix | N | . | . | . | . | . | . | . | |||
| Gyalectidium | caucaseum | . | . | . | . | . | E | . | . | |||
| Gyalidea | mexicana | N | . | . | . | . | . | . | . | |||
| Gymnoderma | lineare | N | . | . | . | . | . | . | . | |||
| Gyrostomum | scyphuliferum | N | . | WI | . | . | . | . | . |
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