Pycnora xanthococca (Sommerf.) Hafellner
in Hafellner & Türk, Stapfia, 76: 158, 2001. Basionym: Lecidea xanthococca Sommerf. - Suppl. Fl. Lapp.: 154, 1826,
Synonyms:
Description: Thallus crustose, episubstratic, areolate, the areoles up to 0.7(-1.2) mm wide pale grey to yellowish brown, dull. Cortex up to 15 µm thick, of thin-walled hyphae; medulla white, I-. Apothecia frequent, lecideine, black, epruinose, up to 0.8(-1.2) mm across, with a flat disc and a raised, persistent, often flexuose proper margin. Proper exciple of closely conglutinated hyphae, brownish black in outer part, dark brown within, K+ violet, N-; epithecium greenish or brownish green, without crystals, K+ violet, N-; hymenium colourless, 55-70 µm high; paraphyses sparingly branched and anastomosing, the apical cells hardly swollen; hypothecium brown. Asci 8-spored, broadly clavate, with a well developed, amyloid tholus containing an ocular chamber and a broad axial mass, Lecanora-type. Ascospores 1-celled, hyaline, ellipsoid, (7-)8-12(-13) x (3-)4-6(-7) µm. Pycnidia usually numerous, with a dirty green wall reacting K-, N+ violet. Conidia subglobose to broadly ellipsoid, 2.5-4 x 1.5-3 µm, 1.2-1.7 times as long as wide. Photobiont chlorococcoid. Spot tests: cortex and medulla K+ yellow, C+ red, KC+ red, P+ yellow, UV-. Chemistry: alectorialic acid and an unidentified substance.
Growth form: Crustose
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
pH of the substrata:
1 2 3 4 5
Solar irradiation:
1 2 3 4 5
Aridity:
1 2 3 4 5
Eutrophication:
1 2 3 4 5
Poleotolerance:
0 1 2 3
Altitudinal distribution:
1 2 3 4 5 6
Rarity
absent
extremely rare
very rare
rare
rather rare
rather common
common
very common
extremely common
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Occurrence data
Predictive map
Einar Timdal - Source: http://nhm2.uio.no/lav/web/index.html - CC BY-NC
Leif Stridvall - Source: http://www.stridvall.se/la/galleries.php
Growth form: Crustose
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
pH of the substrata:
| 1 | 2 | 3 | 4 | 5 |
Solar irradiation:
| 1 | 2 | 3 | 4 | 5 |
Aridity:
| 1 | 2 | 3 | 4 | 5 |
Eutrophication:
| 1 | 2 | 3 | 4 | 5 |
Poleotolerance:
| 0 | 1 | 2 | 3 |
Altitudinal distribution:
| 1 | 2 | 3 | 4 | 5 | 6 |
Rarity
absent
extremely rare
very rare
rare
rather rare
rather common
common
very common
extremely common
Loading data...
Occurrence data
Predictive map
Einar Timdal - Source: http://nhm2.uio.no/lav/web/index.html - CC BY-NC
