Arthopyrenia subcerasi (Vain.) Zahlbr.

Cat. Lich. Univ., 1: 298, 1921. Basionym: Verrucaria subcerasi Vain. - Meddeland. Soc. Fauna Fl. Fenn., 10: 189, 1883.
Synonyms: Arthopyrenia subalbicans Bagl. & Carestia
Distribution: N - Piem (E.C.I. 2: 722, Ravera 2014c, 2014d).
Description: Thallus crustose, endosubstratic, usually inconspicuous and poorly visible, not lichenized. Perithecia black, more or less elliptical in outline, 0.2–0.25 x 0.15-0.2 mm. Involucrellum dimidiate, brown both in water and K; exciple colourless; pseudoparaphyses persistent, 1.5-2.5 μm thick, richly branched, the cells c. 4–10 μm long. Asci 8-spored, obpyriform, fissitunicate, 55–80 × 19–30 μm. Ascospores 3-septate, hyaline nut sometimes turning brownish and warted when overmature, 22–31 × 7–9 μm, with a <1 μm thick or indistinct perispore. Pycnidia black, 0.4–0.6 mm across. Conidia bacilliform, 4–5 x 0.8–1 μm. Photobiont absent. Spot tests: all negative. Chemistry: without lichen substances.
Note: a mainly boreal-montane, non-lichenised species occurring on the bark of Betula; known from Scandinavia, the United Kingdom, Galicia, and the Alps. For further details see Ravera (2014c, 2014d).
Growth form: Fungus
Substrata: bark
Reproductive strategy: mainly sexual
Pioneer species

Commonnes-rarity: (info)

Alpine belt: absent
Subalpine belt: very rare
Oromediterranean belt: absent
Montane belt: very rare
Submediterranean belt: absent
Padanian area: absent
Humid submediterranean belt: absent
Humid mediterranean belt: absent
Dry mediterranean belt: absent

pH of the substrata:


Solar irradiation:








Altitudinal distribution:


Predictive model

Sample ID: H9221120 License: by-nc (2018) License Holder: Marko Mutanen, University of Oulu

Sample ID: H9221120 License: by-nc (2018) License Holder: Marko Mutanen, University of Oulu

University of Helsinki - CC BY-SA 4.0 Source: non - CC BY-SA NC - Source: