Arthonia patellulata Nyl.
Bot. Not.: 95, 1853.
Synonyms: Allarthonia patellulata (Nyl.) Zahlbr.; Arthonia betuleti Nyl.; Coniangium krempelhuberi A. Massal.; Coniangium krempelhuberi var. effusum A. Massal.?
Description: Thallus crustose, very thinly episubstratic, smooth to finely rugose, white, grey-white or yellowish, without a distinct prothallus. Apothecia arthonioid, rounded, sessile, 0.2-0.7 mm across, with a black, flat to slightly convex, epruinose disc, without a proper margin. Proper exciple poorly developed, of paraphysoid-like hyphae; epithecium grey-green to olivaceous brown, 10-15(-20) µm high, K-, the hyphal tips embedded in a brownish gel, anticlinally arranged, up to 2 µm wide, without distinct apical caps; hymenium colourless or yellowish green, not inspersed with oil droplets, 35-60 µm high, I+ reddish, K/I+ blue; paraphysoids vertically oriented, branched and anastomosing, slender, c. 1.5 µm thick, not capitate, without a brown cap; hypothecium dark brown to black, 30-80 µm high. Asci 8-spored, broadly clavate to subglobose, semi-fissitunicate, with a large apical dome, a distinct ocular chamber and a K/I+ blue ring-structure, approaching the Arthonia-type, 26-35 x 10-15 µm. Ascospores 1-septate, constricted at septum, with unequal cells (one subglobose, the other narrower and pointed), hyaline, obovate, 9-15 x 3-5 µm. Pycnidia black, sessile, c. 0.05 mm wide. Conidia bacilliform, straight or slightly curved, 3-6 x c. 1 µm. Photobiont chlorococcoid, sometimes poorly evident. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.
Growth form: Crustose
Substrata: bark
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Pioneer species
Commonnes-rarity: (info)
Alpine belt: absent
Subalpine belt: extremely rare
Montane belt: very rare
Dry submediterranean belt: absent
Humid submediterranean belt: absent
Padanian area: absent
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
Domenico Puntillo; Owner: Domenico Puntillo
Italy
P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (11245)
2003/01/23
Domenico Puntillo; Owner: Domenico Puntillo
Italy
Curtis Randall Björk, - CC BY-SA 4.0
Sugarbowl-Grizzly Den Provincial Park, British Columbia, Canada
August 2017
Redinger, K. (1938) Arthoniaceae, Graphidaceae . In Kryptogamen-Flora von Deutschland, Österreich und der Schweiz. Band 9, 2 Abt., Part 1 (G. L. Rabenhorst, ed.): 181–404. Leipzig: Borntraeger
Growth form: Crustose
Substrata: bark
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Pioneer species
Commonnes-rarity: (info)
Alpine belt: absent
Subalpine belt: extremely rare
Montane belt: very rare
Dry submediterranean belt: absent
Humid submediterranean belt: absent
Padanian area: absent
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
Domenico Puntillo; Owner: Domenico Puntillo
Italy
P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (11245)
2003/01/23
Domenico Puntillo; Owner: Domenico Puntillo
Italy
Curtis Randall Björk, - CC BY-SA 4.0
Sugarbowl-Grizzly Den Provincial Park, British Columbia, Canada
August 2017
