Order: Incertae sedis       Family: Arthopyreniaceae Species: Arthopyrenia analepta Growth type crustose. Photos: On Birch and Hazel. Co. Cork, SW Ireland. Specimen immediately below identified by John Douglass Inconspicuous thin or evanescent non-lichenised thallus, often brownish on Hazel and Oak. No orange colour when scratched. Large, +/- oval perithecia, base of discs surrounded by a dark, flat, halo-like shadow. Pycnidia are sometimes present. The asci are cylindrical, the spores 1-septate with a wide, colourless perispore, 15-23 x 5.5-8 µm. Micro photos below. Found on moderately shaded smooth bark, often an early coloniser on twigs and small branches. Chemical reations negative.

Microscope photographs




Arthopyrenia analepta September, November 2009 and January 2012