Order: Lecanorales       Family: Catillariaceae Species: Catillaria lenticularis Growth type crustose Photos: Coachford old cemetery, Co. Cork, SW Ireland. Identification confirmed by John Douglass Thin or immersed whitish, beige or pale brown thallus. Numerous grouped or scattered apothecia, reddish to dark brown, often +/- immersed. Spores are 7-10(-12) × (2-)2.5-3.5(-4) µm. Paraphyses with dark swollen tips. The photobiont is Dictyochloropsis. Microscope photograph below. Chemical results negative Common on limestone, calcareous rocks and building materials. Similar: Catillaria chalybeia is found on siliceous rocks

Microscope photograph

Catillaria lenticularis . April 2012