ITALIC 7.0

Xylopsora caradocensis (Nyl.) Bendiksby & Timdal

Taxon, 62: 953, 2013. Basionym: Lecidea caradocensis Leight. ex Nyl. - Act. Soc. Linn. Bordeaux, 21: 383, 1857.

Synonyms: Bilimbia caradocensis (Nyl.) A.L. Sm.; Hypocenomyce caradocensis (Nyl.) P. James & Gotth. Schneid.; Lecidea acutula Nyl.; Psora acutula (Nyl.) Walt. Watson; Psora caradocensis (Nyl.) Mudd; Toninia caradocensis (Nyl.) J. Lahm

Distribution: N - Ven, TAA (Nascimbene 2008b, 2013). C - Abr (Nimis & Tretiach 1999).

Description: Thallus squamulose, the squamules up to 1(-1.5) mm wide, adnate, bullate or ascending, grey green to dark brown, dull, crenulate or incised. Upper cortex of thin-walled hyphae, up to 30 µm thick, including and up to 20 µm thick epinecral layer; lower cortex absent. Apothecia lecideine, up to 0.5(-0.8) mm across, marginal or laminal, with a black, flat, epruinose, sometimes gyrose disc, and a prominent, persisting, more or less flexuose proper margin. Proper exciple of closely conglutinated hyphae, brownish black in outer part, dark brown within, N-; epithecium dark brown, N-; hymenium colourless, 40-50 µm high; paraphyses short-celled, sparingly branched and anastomosing, the apical cells hardly swollen; hypothecium pale brown in young apothecia, later turning dark brown. Asci 8-spored, narrowly rhombic, with an apical amyloid cap and a small, amyloid tholus containing a non-amyloid central plug. Ascospores 1-celled to 1(-3)-septate, hyaline, narrowly ellipsoid to fusiform, (5-)7-12(-15) x 2-5 µm. Pycnidia black, sessile, with a brown wall, N-. Conidia simple, hyaline, narrowly ellipsoid, 2.5-5 x c. 1.2 µm. Spot tests: upper cortex and medulla K-, C-, KC-, P-; cortex UV-, medulla UV+ faintly white. Chemistry: friesiic acid in the medulla.

Note: a cool-temperate to boreal-montane lichen, mostly found on conifers in the upper montane and subalpine belts; probably more widespread in the Alps. It is included in the Italian red list of epiphytic lichens as “Endangered” (Nascimbene & al. 2013c).

Growth form: Squamulose

Substrata: bark and lignum

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: very 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

Herbarium samples

Index Fungorum GBIF

Einar Timdal - Source: http://nhm2.uio.no/lav/web/index.html - CC BY-NC

E. Pittao; Owner: Department of Life Sciences, University of Trieste

Herbarium: TSB (TSB 23468)
20.10.2009

E. Pittao; Owner: Department of Life Sciences, University of Trieste

Herbarium: TSB (TSB 23468)
20.10.2009

Pier Luigi Nimis - CC BY-SA 4.0

TSB 23468

P.L. Nimis CC BY-SA 04

TSB 41575

P.L. Nimis CC BY-SA 04

TSB 41575

P.L. Nimis CC BY-SA 04

TSB 41575

E. Pittao CC BY SA 4.0

TSB 38813