Order: Incertae sedis       Family: Arthopyreniaceae Species: Arthopyrenia analepta Growth type crustose. Photos: On Birch and Hazel. Co. Cork, SW Ireland. Inconspicuous thin or evanescent non-lichenised thallus, often brownish on Hazel and Oak. No orange colour when scratched. Large, +/- oval perithecia 0.3-0.6 mm long, the base of the discs surrounded by a dark, flat, halo-like shadow. Pycnidia are sometimes present. Asci cylindrical, spores 1-septate with wide, colourless perispore, 15-23 x 5.5-8 µm, and many of the cells are biguttulate. Micro photos below. Occurs on smooth, moderately shaded bark and is often an early coloniser of twigs and small branches. Chemical reations negative. Similar: A. punctiformis has smaller perithecia, 0.1-0.25mm diam

Microscope photographs



Arthopyrenia analepta September, November 2009 and January 2012