ITALIC 8.0

Thelenella justii (Servít) H. Mayrhofer & Poelt

Herzogia, 7: 61, 1985. Basionym: Microglaena justii Servít in Zschacke - Rabenh. Krypt.-Flora, 9, 1: 665, 1934.

Synonyms:

Distribution: C - Laz.

Description: Thallus crustose, endosubstratic or very thinly episubstratic, dirty white, granulose and almost pseudoisidiate, without a distinct prothallus. Perithecia scattered, immersed and hardly visible, globose, up to 0.5 mm across, pale, with a centrally located, pale reddish brown ostiole. Exciple colourless, 2-layered, the outer layer prosoplectenchymatous, the inner layer finely paraplectenchymatous with small cells; paraphysoids thread-like, c. 0.5 μm thick, sparingly branched and anastomosing; hymenial gel I-, K/I-. Asci 2(-8)-spored (only 2 spores well-developed, the others aborting early), broadly cylindrical, fissitunicate, with two functional wall-layers, the inner wall thin and the outer thick, without a distinct ocular chamber, K/I-. Ascospores submuriform to muriform, with 11-15 transverse septa and 1-2 longitudinal septa, hyaline, elongate-ellipsoid to fusiform, with pointed ends, (27-)35-46(-50) x (9-)12-16(-18) μm, the outer wall scarcely thicker than the septa. Pycnidia immersed, resembinlg small perithecia, up to 0.3 mm across, the wall prosoplectenchymatous, pigmented in inner part. Conidia thread-like, hyaline, curved, 11-17 x c. 0.5 μm. Photobiont chlorococcoid, the algal cells without a gelatinous sheath. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: a mild-temperate lichen described from Greece (on the bark of Abies cephalonica) and also known from France, Spain and Algeria, found on the bark of broad-leaved, rarely of coniferous trees in sheltered situations, with optimum in the Mediterranean-montane belt, descending to the Mediterranean belt in particularly humid areas of Tyrrhenian Italy. It was included in the Italian red list of epiphytic lichens as “Data Deficient” (Nascimbene & al. 2013c).

Growth form: Crustose

Substrata: bark

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: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: extremely rare

Submediterranean belt: absent

Padanian area: absent

Humid submediterranean belt: very rare

Humid mediterranean belt: very rare

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

André Aptroot CC BY-SA NC – Source: http://www.tropicallichens.net/2703.html

André Aptroot CC BY-SA NC – Source: http://www.tropicallichens.net/2703.html