Lichen Taxa held in MSC
| Genus | Species | N | MI | WI | S | Aus | E | Af | As | Notes | ||
| Icmadophila | ericetorum | N | MI | . | . | . | E | . | . | |||
| Icmadophila | splachnirima | . | . | . | . | Aus | . | . | . | |||
| Illosporium | carneum | N | . | . | . | . | . | . | . | lichenicolous | ||
| Imshaugia | aleurites | N | MI | . | S | Aus | E | . | . | |||
| Imshaugia | placorodia | N | MI | . | . | . | . | . | . | |||
| Ingaderia | gracillima | . | . | . | S | . | . | . | . | |||
| Ingaderia | pulcherrim | . | . | . | S | . | . | . | . | |||
| Ionaspis | lacustris | N | . | . | . | . | E | . | . | syn. Hymenelia | ||
| Ionaspis | odora | N | . | . | . | . | E | . | . | |||
| Ionaspis | suaveolens | . | . | . | . | . | E | . | . |
| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | Pa | Pi | Q | R | S | T | U | V | W | X | Y | Z | Types |