Family: Trypetheliaceae (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. Involucrellum dark brown, K+ green. 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