ITALIC 8.0

Lithographa tesserata (DC.) Nyl.

Act. Soc. Linn. Bordeaux, 21: 441, 1857. Basionym: Opegrapha tesserata DC. in Lamarck & de Candolle - Fl. Franç., éd. 3, 2: 313, 1805.

Synonyms: Graphis petraea (Ach.) Wallr.; Haplographa tumida Anzi; Lithographa petraea (Ach.) Nyl.; Lithographa petrophila (Wedd.) Boistel; Lithographa tesserata var. petraea (Ach.) Redinger; Lithographa tumida (Anzi) Ozenda & Clauzade; Opegrapha petraea Ach.; Placographa nivalis Th. Fr.; Placographa tesserata (DC.) Th. Fr.

Distribution: N - TAA (Nascimbene & al. 2022), Lomb, Lig.

Description: Thallus crustose, episubstratic, rather thick (0.2-0.4 mm), whitish to pale grey-brown, areolate, often delimited by a black prothallus. Areoles flat to convex, more or less angular, 0.3-0.8(-1.5) mm wide, developing on a black hypothallus. Cortex densely inspersed with small crystals dissolving in K; medulla white, I- or I+ faintly violet. Apothecia lirelliform, black, slightly raised over the thallus, 0.2-1.5 x 0.2-0.4 mm, simple or sparingly branched, sometimes stellate, straight or curved, somewhat shiny, with a raised, inward-turned margin hiding the slit-like disc. Exciple black, carbonized; epithecium dark brown, granulose; hymenium colourless to brownish, 60-95 µm high, not inspersed with oil droplets, I+ blue; paraphyses slender, up to 1 µm thick, mostly simple, not capitate. Asci 8-spored, clavate, the tholus with K/I+ dark blue flanks and a broad, non-amyloid, axial mass, Rimularia-type. Ascospores 1-celled, hyaline, ellipsoid to ovoid, 9-15 x 5-8 µm. Photobiont chlorococcoid. Spot tests: medulla K+ yellow turning red, C-, KC+ red, P+ faintly yellow-orange, UV-. Chemistry: norstictic acid in the medulla.

Note: on sheltered base-rich siliceous rocks in humid upland areas; probably restricted to the Alps in Italy.

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than 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: extremely rare

Subalpine belt: extremely 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:

1

2

3

4

5

(info)

Solar irradiation:

1

2

3

4

5

(info)

Aridity:

1

2

3

4

5

(info)

Eutrophication:

1

2

3

4

5

(info)

Poleotolerance:

0

1

2

3

(info)

Altitudinal distribution:

1

2

3

4

5

6

(info)

Predictive model

Index Fungorum GBIF

Toby Spribille Toby Spribille. Source: http://www.waysofenlichenment.net/lichens/

Toby Spribille; Owner: Toby Spribille. Source: http://www.waysofenlichenment.net/lichens/