Arthopyrenia punctiformis Naetrocymbaceae
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, 16-20(-22) x 4.5-5 Ám. Microscope photograph below.

Often found with Arthonia punctiformis

Arthopyrenia punctiformis

Microscope photograph
Arthopyrenia punctiformis

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

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