Fuscidea lygaea (W. Mann) V. Wirth & Vězda

in Wirth, Beitr. naturk. Forsch. Südwestdeutschl., 31: 92, 1972. Basionym: Biatora lygaea W. Mann - Lich. Bohem.: 48, 1825.
Synonyms: Catillaria massalongii Körb. non auct.; Fuscidea periplaca (Nyl.) V. Wirth & Vězda; Fuscidea tenebrica (Nyl.) V. Wirth & Vězda; Lecidea kochiana var. lygaea (Ach.) Leight.; Lecidea lygaeoplaca Vain.; Lecidea obscurata (Ach.) Schaer.; Lecidea pantosticta Ach.; Lecidea periplaca Nyl.; Lecidea tenebrica Nyl.; Rhizocarpon massalongii (Körb.) Malme non auct.
Distribution: N - TAA, Lomb, Piem (Isocrono & al. 2004, 2006), VA (Piervittori & Isocrono 1999), Lig. C - Tosc, Sar (Nöske 2000).
Description: Thallus crustose, episubstratic, grey-brown to dark brown, often with a purplish tinge, thin and continuous or incompletely and very finely rimose-areolate, the areoles to 0.7 mm wide (often smaller), irregular, mostly flat; prothallus often evident, dark brown, thin. Medulla white, I-. Apothecia lecideine to biatorine, 0.2-0.6(-1) mm across, adpressed to sessile, black, rounded, with a flat to strongly convex disc and a very thin, not raised, soon excluded proper margin. Proper exciple poorly developed, brown; epithecium brown; hymenium and hypothecium colourless; paraphyses weakly conglutinated, simple or sparingly branched in upper part, 1.5-2 μm thick at mid-level, the apical cell clavate, to 5 μm wide. Asci 8-spored, clavate, with a thin external and internal K/I+ dark blue cap surrounded by a thick K/I+ pale blue apical cap, and with a K/I- apical tube in tholus, Fuscidea-type. Ascospores 1-celled, hyaline, subglobose to broadly ellipsoid, 5-10 x 5-7 μm. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-. UV-. Chemistry: thallus without lichen substances.
Note: on steeply inclined to underhanging surfaces of hard siliceous rocks in upland areas.
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
In underhangs rarely wetted by rain

Commonnes-rarity: (info)

Alpine belt: rare
Subalpine belt: rare
Oromediterranean belt: rare
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:

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Solar irradiation:

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Aridity:

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Eutrophication:

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Poleotolerance:

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Altitudinal distribution:

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Predictive model
Herbarium samples


P.L. Nimis CC BY-SA 4.0
TSB 16742



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (16742)
2001/11/24