Irish lichens

Caloplaca cerinella

Order: Teloschistales       Family: Teloschistaceae

Species: Caloplaca cerinella

Growth type crustose.
Photos: On Ash twig. Ballingeary, Co. Cork, SW Ireland.
Identification confirmed by B. Coppins

Thin, smooth, grey to white thallus forming small patches or +/- immersed. Very small closely grouped apothecia, discs pale yellow to orange with paler persistent margins. Asci are (8-)12-16 spored, the spores polarilocular, 10-13 x 6-7 Ám, the septum 3-5 Ám wide, 1/4 - 1/2 spore length. Microscope photograph below.
Thallus K-, apothecia K+ red-purple

Inconspicuous, possibly often overlooked on bark of twigs and small branches of Ash and Elder.

Similar: C. cerina. Larger discs, asci 8-spored.

Caloplaca cerinella

Microscope photograph
Caloplaca cerinella, ascospore
Caloplaca cerinella. January 2010 and 2012

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