Tremolecia atrata (Ach.) Hertel

Khumbu Himal, 6, 3: 351, 1977. Basionym: Gyalecta atrata Ach. - K. Vetensk.-Akad. Nya Handl., 29: 229, 1808.
Synonyms: Aspicilia dicksonii (J.F. Gmel.) Maheu & A. Gillet; Aspicilia melanophaea (Fr.) Körb.; Lecidea atrata (Ach.) Wahlenb.; Lecidea atroferrata Branth & Grønlund; Lecidea circumcisa H. Magn.; Lecidea dicksonii auct. non (J.F. Gmel.) Ach.; Lecidea lactea var. melanophaea (Fr.) Nyl.; Lecidea melanophaea Fr.; Tremolecia dicksonii (J.F. Gmel.) M. Choisy
Description: Thallus crustose, episubstratic, continuous or more commonly of contiguous, flat, irregular, 0.1-0.5 mm wide, dark orange-red to rusty red, rarely ochraceous areoles, often delimited by a black prothalline line. Cortex 10-25 µm thick; medulla I-. Apothecia lecideine, round to angular in outline, 0.2-0.7 mm across, partly immersed to sessile, black, with a concave to flat, epruinose, sometimes umbonate disc and a persistent, slightly raised, sometimes wavy proper margin. Proper exciple dark brown to black, 30-80(-90) µm wide laterally, more or less friable, of radially arranged hyphae, K+ purple, extending below the hymenium; epithecium pale grey to dark grey-green, 10-15 µm high; hymenium colourless or greenish, 65-90 µm high, I+ reddish orange; paraphyses coherent, sparingly branched and anastomosing, 1.5-2 µm thick at mid-level, the apical cells not or only slightly swollen, up to 2.5-3 µm wide; subhymenium colourless to pale brown, 10-40 µm high; hypothecium (in continuation with the exciple) dark brown, 60-70 µm high, K+ purple. Asci 8-spored, clavate, with a thin amyloid outer gelatinous coat, the tholus well-developed, K/I+ weakly blue, without ocular chamber and internal beak. Ascospores 1-celled, hyaline, ellipsoid, (9-)10-17 x 6-10 µm. Pycnidia black, immersed. Conidia bacilliform, 3-6 x 1-1.5 µm. Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: an unidentified rust-coloured pigment in the cortex.
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Species of metal-rich rocks
Pioneer species

Commonnes-rarity: (info)

Alpine belt: very common
Subalpine belt: common
Montane belt: very rare
Dry submediterranean belt: absent
Humid submediterranean belt: absent
Padanian area: absent

pH of the substrata:

12345
info

Solar irradiation:

12345
info

Aridity:

12345
info

Eutrophication:

12345
info

Poleotolerance:

0123
info

Altitudinal distribution:

123456
info

Rarity

absent
extremely rare
very rare
rare
rather rare
rather common
common
very common
extremely common
Loading data...
Occurrence data
Predictive map
Model ImageCurrent prediction (1981-2010)
Model ImageFuture prediction (2071-2100) SSP 1-2.6
Model ImageFuture prediction (2071-2100) SSP 5-8.5
Predictive maps according to Francesconi et al. 2025

P.L. Nimis CC BY-SA 04
TSB 41876


P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (9468)
2001/12/01


Andres Saag; Owner: University of Tartu


Juri Nascimbene - CC BY-SA 4.0
Mt. Adamello (Alps), Italy
2006


Juri Nascimbene - CC BY-SA 4.0
Stelvio National Park, Reg. Trentino-Alto Adige Prov. Trento, Italy.
07.2005


Curtis Randall Björk, - CC BY-SA 4.0
Sugarbowl-Grizzly Den Provincial Park, British Columbia, Canada
August 2017
as v. tilesii


Helena Rodriguez
Spain, Galicia, Peña Trevinca
06.2019


Pier Luigi Nimis - CC BY-SA 4.0
TSB 41876


Leif Stridvall - Source: http://www.stridvall.se/la/galleries.php (Courtesy: Anita Stridvall)


Pier Luigi Nimis - CC BY-SA 4.0
TSB 41876


P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (9468)
2001/12/01


P.L. Nimis CC BY-SA 4.0
TSB 38076


P.L. Nimis CC BY-SA 4.0
TSB 38076


P.L. Nimis CC BY-SA 4.0
TSB 41876


Nere Sorrentino
Spain, Ourense, 700 m c.


Walter Obermayer CC BY-SA 4.0 - Source: Lichens of Noricum - http://lichens-of-noricum.uni-graz.at/


Walter Obermayer CC BY-SA 4.0 - Source: Lichens of Noricum - http://lichens-of-noricum.uni-graz.at/


Walter Obermayer CC BY-SA 4.0 - Source: Lichens of Noricum - http://lichens-of-noricum.uni-graz.at/


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=414&lang=en
France, Commana


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=414&lang=en
France, Commana


Wolfgang von Brackel - CC BY-4.0
Greenland, Blomsterdalen


Wolfgang von Brackel - CC BY-4.0
Greenland, Blomsterdalen


Wolfgang von Brackel - CC BY-4.0
Greenland, Tugtutoq