Leptogium marginellum
- kingdom: Fungi
- phylum: Ascomycota
- class: Lecanoromycetes
- order: Peltigerales
- family: Collemataceae
- genus: Leptogium
- species: Leptogium marginellum
- Wahiawā
- Whitmore Village
Hawaii- Cade
- Greenwood
- Jackson
- Shenandoah
Louisiana
United States