ITALIC 8.0

Tetramelas chloroleucus (Körb.) A. Nordin

Lichenologist, 36: 356, 2004. Basionym: Buellia chloroleuca Körb. - Parerga Lichenol.: 191, 1860.

Synonyms: Buellia parasema var. saprophila (Ach.) Körb.; Buellia poeltii T. Schauer; Buellia punctata var. saprophila (Ach.) Anzi; Buellia zahlbruckneri sensu T. Schauer; Tetramelas poeltii (T. Schauer) Kalb

Distribution: N - Frl, Ven (Giralt & al. 2000, Nascimbene & Caniglia 2003c, Thor & Nascimbene 2007), TAA (Giralt & al. 2000, Nascimbene & al. 2006e, 2007b, 2008c, 2022, Nimis & al. 2015), Lomb (Giralt & al. 2000, Gheza & al. 2023), Piem (Isocrono & al. 2004), Emil (Fariselli & al. 2020). C - Abr.

Description: Thallus crustose, episubstratic, granular to rimose-areolate, rather thin, dark to pale greenish grey or more rarely ochraceous, sometimes delimited by a black prothallus. Medulla white, lacking calcium oxalates, I-. Apothecia lecideine, black, 0.2-0.8(-1) mm across, soon sessile, with a flat to convex, epruinose disc, and a thin, soon excluded proper margin. Proper exciple narrow, c. 60 µm wide laterally, Aethalea-type, the inner hyphae hyaline, prosoplectenchymatous, the outer hyphae parallel and usually strongly brown-pigmented; epithecium brown; hymenium colourless, 80-90 µm high, not inspersed with oil droplets; paraphyses simple to moderately branched, apically swollen, with a brown pigment cap; hypothecium brown. Asci 8-spored, clavate to cylindrical-clavate, the apical dome K/I+ dark blue with a pale, conical-pointed apical cushion (axial mass), the wall I-, but the thin outer gel I+ blue, Bacidia-type. Ascospores 1-septate, brown, narrowly ellipsoid, not constricted at septa, sometimes slightly curved, (13-)16-20(-24) x (5.5-)7-9(-11) µm, Buellia-type, but sometimes slightly thickened at apices (Callispora-type when immature), the wall faintly microrugulate. Pycnidia rare, black, globose. Conidia bacilliform, 3-6.5 x 0.5-1 µm. Spot tests: K+ weakly yellow, C+ pale yellow-orange, KC+ orange, P-, UV+ weakly orange. Chemistry: 6-O-methylarthothelin, plus variable amounts of arthothelin with isoarthothelin, atranorin, and other xanthones.

Note: a mainly boreal-montane species found on lignum, more rarely on bark, especially of conifers, with optimum in the upper montane belt. See also note on B. erubescens.

Growth form: Crustose

Substrata: lignum

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: rather rare

Oromediterranean belt: absent

Montane belt: 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

P.L. Nimis CC BY-SA 4.0

TSB 33232

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste

Herbarium: TSB (9197)
2002/01/02
as B. zahlbruckneri

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste

Herbarium: TSB (33232)
2003/03/11