Calicium lucidum (Th. Fr.) M. Prieto & Wedin

Fungal Divers, 2016 (MB 817534). Basionym: Trachylia lucida Th. Fr. - Öfvers. K. Vetensk.-Akad. Handl., 12: 18, 1855.
Synonyms: Acolium lucidum Rabenh.; Calicium virellum Nyl.; Cyphelium lucidum (Th. Fr.) Th. Fr.
Distribution: N - Ven (Puntillo & Puntillo 2009), TAA (Nascimbene & al. 2007b, Puntillo & Puntillo 2009), Lomb (Puntillo & Puntillo 2009).
Description: Thallus crustose, areolate to warted, the marginal areoles somewhat elongate, bright yellow-green. Cortex of minute isodiametric cells; photobiont layer densely inspersed with minute yellow crystals. Apothecia 0.5-1 mm across, with a distinctly yellow-pruinose margin. Exciple blackish brown, strongly thickened at base, of sclerotized, interwoven hyphae; mazaedium present, black; hypothecium convex, up to 225 µm thick in the central part. Asci 8-spored, clavate, formed singly from hooked ascogenous hyphae, dissolving early, with uniseriately arranged ascospores. Ascospores 1-septate and constricted at septum, brown, ellipsoid, 17-22 x 8-10 µm, first smooth but soon with a rimose-areolate surface. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-. Chemistry: thallus with vulpinic acid.
Note: a mainly boreal-montane, circumpolar species found on old conifers in humid, open, montane to subalpine forests with frequent fog. Rare in the Alps. It was included as “Regionally Extinct” in the Italian red list of epiphytic lichens (Nascimbene & al. 2013c).
Growth form: Crustose
Substrata: bark
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: absent
Subalpine belt: very rare
Oromediterranean belt: absent
Montane belt: extremely 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
Herbarium samples

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (11515)
young apothecia

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (11515)