Lambiella gyrizans (Nyl.) M. Westb. & Resl

in Resl, & al., Fungal Divers., 73: 255, 2015. Basionym: Lecidea gyrizans Nyl. - Not. Sällsk. Fauna Fl. Fenn. Förh., Ny Ser., 3: 83, 1861
Description: Thallus crustose, episubstratic, areolate, grey-brown to red-brown, the areoles contiguous, strongly convex, round to angular, 0.2-1 mm wide. Medulla white, I-. Apothecia lecideine, black, round to angular in outline, 0.2-0.5(-0.8) mm across, immersed or subsessile, with a flat to convex, minutely wrinkled, umbonate or almost gyrose disc and a thin, often convolute proper margin. Proper exciple thin, dark brown, K-; epithecium brown, K-; hymenium colourless, 80-120 μm high; paraphyses richly branched and anastomosing, 1.5-1.8 μm thick at mid-level,, short-celled and often submoniliform in upper part, the apical cells up to 4 μm wide, hypothecium dark brown. Asci 8-spored, clavate, with a K/I+ blue tholus with a funnel-shaped central unstained region, and a small, obconical K/I+ blue dome. Ascospores 1-celle, hyaline, ellipsoid to broadly ellipsoid, 8-11 x 4.7-8 μm. Pycnidia dark, 60-150 μm across, immersed, the wall brown in upper part, colourless in lower part. Conidia simple, bacilliform, 5-8.5 x 0.8-1 μm. Photobiont chlorococcoid. Spot tests: medulla K+ yellow, C-, KC-, P+ yellow. Chemistry: stictic acid plus variable amounts of norstictic acid.
Note: on siliceous boulders and outcrops in the boreal zone and in the montane to subalpine belt in temperate orobiomes, rarely higher; widespread in the Northern Hemisphere but not common, with a single record from the Eastern Alps (Austria); to be looked for in the Italian Alps.
Growth form: Crustose
Substrata: rocks
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)

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Altitudinal distribution:


Predictive model - Licence: CC BY-NC 3. Photo uploaded by Paul Cannon

Source: - Licence: CC BY-NC 3. Photo uploaded by Paul Cannon