Lecanographa lyncea (Sm.) Egea & Torrente

Bibl. Lichenol., 54: 142, 1994. Basionym: Lichen lynceus Sm. in Smith & Sowerby - Engl. Bot., 12: 809, 1801.
Synonyms: Lecanactis emersa (Müll. Arg.) Stizenb.; Lecanactis lyncea (Sm.) Fr.; Lecanactis plocina (Ach.) A. Massal. non auct.; Lecanactis stictica Durieu & Mont.; Opegrapha caesia Ach. non DC.; Opegrapha emersa Müll. Arg.; Opegrapha lyncea (Sm.) Hook.; Opegrapha stictica (Durieu & Mont.) Nyl.; Opegrapha vestita Müll. Arg.
Distribution: N - Ven, TAA (Dalla Torre & Sarnthein 1902, Nascimbene & al. 2007b), Lomb, Lig. C - Tosc, Laz (Egea & Torrente 1994), Abr. S - Camp, Pugl (Nimis & Tretiach 1999, Durini & Medagli 2004), Bas.
Description: Thallus crustose, episubstratic, rather thick, continuous to rimose, ecorticate, chalk white to yellowish white, somewhat pulverulent. Apothecia black, subimmersed in the thallus, rarely adnate, very variable in form, round and 0.3-0.7 mm across, or lirelliform, broadly or narrowly oblong, 0.3-1 x 0.3-0.5 mm, simple or slightly branched, straight or curved, with a black, expanded, flat to slightly convex, often blue-grey-pruinose disc, and a usually undulating, scarcely raised, finally often excluded proper margin. Proper exciple black, carbonized, at maturity extending below the hymenium, K+ dark green; pseudothecium pale brown, 15-25 µm thick; hymenium colourless, 60-90 µm tall, I+ pale red or I+ blue; paraphysoids richly branched and anastomosing, up to 1.5 µm thick, the apical cells not or only slightly swollen ; hypothecium blue-black, 20-35 µm high, I+ pale blue. Asci 8-spored, cylindrical-clavate, with an entirely amyloid endoascus, grumulosa-type. Ascospores (6-)8-9(-12)-septate, hyaline (overmature spores brown), narrowly fusiform, (17-)23-35(-41) x 3-4.5 µm, the wall thin, not swollen at septa, surrounded by a thin, sometimes poorly evident gelatinous sheath. Pycnidia black, immersed, subglobose. Conidia straight, bacilliform, 4-6 µm long. Photobiont trentepohlioid. Spot tests: thallus K-, C-, KC-, P-, UV+ ice-blue. Chemistry: confluentic and 2’-0-methylmicrophyllinic acids.
Note: a mild-temperate, mainly western lichen found on the rough, acid bark of very old isolated trees, especially oaks; declining, especially in northern Italy, and presently mainly Tyrrhenian.
Growth form: Crustose
Substrata: bark
Photobiont: 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: extremely rare
Padanian area: absent
Humid submediterranean belt: very rare
Humid mediterranean belt: extremely rare
Dry mediterranean belt: absent

pH of the substrata:

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Altitudinal distribution:

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Predictive model
Herbarium samples


P. L. Nimis CC BY-SA 4.0
TSB 15337



Pier Luigi Nimis - CC BY-SA 4.0
Herbarium: TSB (15337)


courtesy Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_L/Texte_L_2/Lecanographa_lyncea.htm
France, session AFL 2015 dans le Lot


courtesy of Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_L/Texte_L_2/Lecanographa_lyncea.htm
France, session AFL 2015 dans le Lot


courtesy of Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_L/Texte_L_2/Lecanographa_lyncea.htm
France, session AFL 2015 dans le Lot