ITALIC 8.0

Opegrapha endoleuca Nyl.

Annls Sci. Nat., Bot., sér. 4, 3: 168, 1855.

Synonyms:

Distribution:

Description: Thallus crustose, episubstratic, rather thick, rimose or rimose-areolate, smooth or slightly granulose, white, without a distinct prothallus. Apothecia rounded to ellipsoid, 0.5-1 x 0.3-0.5 mm, simple or sparingly branched, with an expanded, bluish grey-pruinose disc, and a raised, often epruinose proper margin. Proper exciple black, carbonized, not extending below the hymenium; epithecium brownish, 20-35 μm high; hymenium colourless, 60-100 μm high, I+ blue; paraphysoids branched and anastomosing, c. 1.5 μm thick, the apical cells hardly swollen; subhymenium and hypothecium colourless to pale yellowish brown. Asci 8-spored, clavate, the inner layer of endoascus amyloid in upper part, with a I+ blue ring visible around a small ocular chamber, Varia-type. Ascospores 3-septate, at first hyaline but turning brown at maturity, ellipsoid, often slightly pointed at one end, 13-16 x (4-)5-6.5 μm, surrounded by a 1-1.2 μm thick gelatinous perispore. Pycnidia black, immersed. Conidia bacilliform, straight, 5-6 x c. 1 μm. Photobiont trentepohlioid. Spot tests: thallus K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: a calcicolous coastal species known from Macaronesia, Spain, North Africa and southern France. To be looked for in Italy.

Growth form: Crustose

Substrata: rocks

Photobiont: Trentepohlia

Reproductive strategy: mainly sexual

Taxon bound to maritime-coastal situations

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

INDEX FUNGORUM GBIF

P.L. Nimis Cc By-Sa4.0

TSB 9050

Pier Luigi Nimis - CC BY-SA 4.0

Herbarium: TSB 9050

Felix Schumm - CC BY 4.0

[VZ1852], Tunesia. Distr. Nabeúl, sinus Hammamet, 10 km ad septentriones et occidentem av urbe Hammamet, 180 m, Ad saxa aprica. Leg et det, J. Hafellner (9851), 17.4.1982. EX A. VEZDA LICHENES SELECTI EXSICCATI NR. 1852.

Felix Schumm - CC BY 4.0

[VZ1852], Tunesia. Distr. Nabeúl, sinus Hammamet, 10 km ad septentriones et occidentem av urbe Hammamet, 180 m, Ad saxa aprica. Leg et det, J. Hafellner (9851), 17.4.1982. EX A. VEZDA LICHENES SELECTI EXSICCATI NR. 1852.