Lichens : Gyalectales : GyalectaceaeLichens

Ramonia luteola (Sacc.) Baral

Description: This lichen grows on nutrient-rich bark such as elder and willow. It resembles a Gyalecta or a small Thelotrema but has six- to nine-septate, maggot-like spores that are rounded at one end and pointed at the other. Spores are less than 6µm wide and up to 43µm long. It is often hard to find on bark and is sometimes collected by accident. In Ireland, the species is known from only one collection.

Key Identification Features:

  • Thallus hardly apparent but with pore-like discs; its lichenized status is dubious
  • Spores curiously maggot-shaped: normally six- to nine-septate with opposite ends blunt and pointed; elder, willow, etc.

Original text submitted by Vince J. Giavarini

Distribution Map from NBN: Ramonia luteola at National Biodiversity Network mapping facility, data for UK.

iNaturalist: Ramonia luteola at iNaturalist World Species Observations database.

 Giavarini, Vince J., Simms, Michael J., & Davey, Simon, 2026. Ramonia luteola. (Sacc.) Baral. [In] Lichen Ireland.
https://www.habitas.org.uk/lichenireland/species.php?item=16948. Accessed on 2026-11-12.