ITALIC 8.0

Protoparmelia olivascens (Nyl.) Llimona

Bull. Inf. Ass. Franç. Lich. 36, 1: 57, 2011.. Basionym: Lecanora olivascens Nyl. - Bull. Soc. linn. Normandie, sér. 2, 6, 2: 263, 1872.

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Distribution:

Description: Thallus crustose, episubstratic, continuous to areolate-subsquamulose, rather thick, chestnut-brown to reddish brown, rarely pale grey, olivaceous or brownish black, sometimes with poorly developed marginal lobes. Areoles flat to convex, the marginal ones sometimes elongate. Cortex of anticlinally arranged hyphae with brown-pigmented caps; medulla white, I-. Apothecia lecanorine, adnate to sessile and constricted at base, round to subangular, 0.3-1(-1.3) mm across, with a brown to brownish black, concave to convex, epruinose disc, and a usually slightly paler, thick, entire or crenulate, usually persistent thalline margin. Thalline exciple corticate, with a distinct medulla filled with algal cells; proper exciple forming a up to 100 µm thick cupular layer below the hypothecium; epithecium brown; hymenium colourless or yellowish, up to 80 µm high; paraphyses coherent in water, distinct in K, with slightly wider apical cells covered by a swollen gelatinous hood; hypothecium colourless. Asci 8-spored, clavate, approaching the Lecanora-type, with a well-developed amyloid tholus and a distinct, non-amyloid axial mass. Ascospores 1-celled, hyaline, narrowly ellipsoid with rounded ends, thin-walled, 8-15 x 3-7 µm. Pycnidia usually abundant, globose to oblong, the ostiole dark brown to black. Conidia simple, bacilliform, straight or slightly curved. Photobiont chlorococcoid. Spot tests: K+ yellow turning red, C- or C+ pink to red, KC- or KC+ red. Chemistry: norstictic acid, gyrophoric acid.

Note: a mainly Mediterranean species of siliceous rocks; to be looked for in Mediterranean Italy.

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

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Altitudinal distribution:

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Predictive model

Index Fungorum GBIF

S. Poumarat http://mycologie.catalogne.free.fr/lichens.htm

S. Poumarat - Source: http://mycologie.catalogne.free.fr/lichens.htm