Lecidea crustulata (Ach.) Spreng.
Porpidia crustulata (Ach.) Hertel & Knoph
Concentric boulder lichen, crust porpidia lichen
[An article has not been written yet.]
4/28/2021 · Cathance River Nature Preserve, Topsham, Maine · ≈ 4½ × 6″ (12 × 14 cm) 
4/28/2021 · Cathance River Nature Preserve, Topsham, Maine · ≈ 3½ × 4½″ (9.8 × 12 cm) 
| Kingdom | Fungi | Mushrooms, lichens, gel fungi, yeasts, and molds; also called eukaryotes |
| Division | Ascomycota | Sac fungi |
| Subdivision | Pezizomycotina | Sac fungi with filaments |
| Class | Lecanoromycetes | “Lichenized” fungi |
| Order | Lecanorales | Mostly lichen-forming fungi |
| Suborder | Lecanorineae | Lichens |
| Family | Porpidiaceae | |
| Genus | Porpidia | |
| Species | crustulata |
Porpidia crustulata description by Thomas H. Kent, not updated.
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