Naetrocymbaceae (Arthopyreniaceae) Naetrocymbe punctiformis (Arthopyrenia punctiformis) Growth type crustose Chemical results negative Common as an early coloniser on smooth twigs and small branches of young trees and shrubs. The inconspicuous, non-lichenised thallus has small, +/- circular, clustered or scattered perithecia. Pycnidia are absent. Spores are initially colourless, 1-septate and often biguttulate, 16-20(-22) x 4.5-5 µm. Microscope photograph below. Often found with Arthonia punctiformis

Microscope photograph



Arthopyrenia punctiformis
On twigs. Westbourne and Wimborne, Dorset. December 2012, February 2017