• Caloplaca arcis (Poelt & Vezda) Arup 

There are no records for this species at present.

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 2018-12-18.