Caloplaca microthallina Teloschistaceae
Caloplaca microthallina

Growth type crustose
Chemical results: K+ crimson

A maritime species often found parasitic on the thallus of Verrucaria maura or following cracks on acidic or calcareous coastal rocks

Thallus of minute and often scattered orange-yellow lobes or squamules, prothallus absent. Conspicuous orange apothecia with crenulate margins. Soredia and isidia are absent.

Caloplaca microthallina
Kimmeridge Bay, Dorset. January 2013

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