Arthopyrenia esenbeckiana

Constrictolumina esenbeckiana is a species of corticolous (bark-dwelling) crustose lichen in the family Trypetheliaceae. This neotropical lichen forms thin, whitish crusts on tree bark and produces small, hemispherical fruiting bodies that often occur in dense clusters of 5–20 individuals that may fuse together sideways. It is known from the Caribbean Antilles and Brazil, where it grows in tropical habitats, though most records are historical.