• Arthonia molendoi (Heufl. ex Frauenf.) R. Sant.

There are no records for this species at present.

This lichenicolous lichen grows on Xanthoria and Caloplaca species. It forms small black convex discs (like dots) containing one-septate spores with unequal cells pinched at the septum. Previously, this species was assigned to A. epiphyscia (described elsewhere) which occurs on Physcia lichens. In Ireland, the species has a predominantly northern distribution.

Key characteristics

  • Lichenicolous on Diploicia canescens
  • Minute black discs; the one-septate spores have unequal cells.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Arthonia molendoi (Heufl. ex Frauenf.) R. Sant.. [In] LichenIreland. Accessed on 2019-01-19.