• Caloplaca arcis (Poelt & Vezda) Arup 

There are no records for this species at present.

Click here to view an interactive map of the Northern Ireland dataset as currently collated by CEDaR.
The map is generated through the NBN Gateway using their Interactive Mapping Tool.


At first glance this species may appear to be C. citrina, but a quick look through a lens will confirm that the thallus is non-sorediate and arranged like miniature granular rosettes, lobed at the edges. It is known only from south Kerry, but is probably more widespread.

Key characteristics

  • Like C. citrina in size, but non-sorediate
  • It forms tiny granular rosettes with lobed edges (granules such as these are termed blastidia).

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Caloplaca arcis (Poelt & Vezda) Arup . [In] LichenIreland. Accessed on 2018-08-20.