Catillariaceae Catillaria lenticularis Growth type crustose Chemical results negative Common on limestone, calcareous rocks and building materials. Thin or immersed whitish, beige or pale brown thallus. Numerous grouped or scattered apothecia, reddish to dark brown, often +/- immersed. Spores are 1-septate, 7-10(-12) × (2-)2.5-3.5(-4) µm. Paraphyses with dark swollen tips. The photobiont is Dictyochloropsis. Micrographs below. Similar: Catillaria chalybeia. On siliceous rocks, photobiont Myrmecia. C. nigroclavata is corticolous. C. atomarioides has much smaller apothecia

Microscope photographs







Catillaria lenticularis
Kimmeridge, Dorset. March 2014