Micarea doliiformis (Coppins & P. James) Coppins & Sérus.

in Sérusiaux & al., Bryologist, 113: 339, 2010. Basionym: Lecidea doliiformis Coppins & P. James - Lichenologist, 24: 361, 1992.
Distribution: S - Cal (Puntillo 1996).
Description: Thallus crustose, episubstratic, effuse, grey-green to whitish grey, finely granulose, the granules 30-60(-80) μm thick, often proliferating to form a rather thick crust, usually forming large patches. Apothecia micareoid, pale brown to pink, often faintly white-pruinose, 0.2-0.5 mm across, convex to subglobose, without a distinct proper margin. Proper exciple not developed; epithecium pale brown due to dense, small crystals dissolving in K; hymenium colourless or with pale brown vertical streaks, 45-50 µm high; paraphyses branched and anastomosing, 0.8-1 µm thick at mid-level, the apical cells up to 2.5(-3) µm wide; hypothecium reddish brown, K+ yellowish brown. Asci 8-spored, cylindrical-clavate, the I+ blue tholus with a wide, I+ dark blue tube structure that expands towards the top, without a pale axial body. Ascospores 1-celled, hyaline, ovoid to oblong-ellipsoid, (7-)8-11 x 2.7-3.7 µm. Pycnidia 0.08-0.16 mm wide, 0.14-0.3 mm tall, numerous, sessile or more or less stalked, somehow barrel-shaped, grey brown to dark grey, but usually thinly white-tomentose, the wall dull brown, K-, N+ reddish brown, but green and K+ intensifying green and N+ red near the ostiole. Conidia shortly oblong or wider at one end, mostly biguttulate, 3.5-4.7 x 1.5-2 μm. Photobiont chlorococcoid, the cells 7-14 µm wide. Spot tests: K-, C- KC- P-, UV-. Chemistry: thallus without lichen substances.
Note: the only Italian sample, collected on Olea at 385 m, is one of the few extra-British records. For further details see Sérusiaux & al. (2010). The species is included in the Italian red list of epiphytic lichens as “Critically Endangered” (Nascimbene & al. 2013c).
Growth form: Crustose
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Most common in areas with a humid-warm climate (e.g. most of Tyrrenian Italy)

Commonnes-rarity: (info)

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

pH of the substrata:


Solar irradiation:








Altitudinal distribution:


Predictive model
Herbarium samples

D. Puntillo CC BY-SA 4.0

Domenico Puntillo; Owner: Domenico Puntillo