Rhizocarpon renneri Poelt
Planta, 51: 306, 1958.
Synonyms:
Description: Thallus crustose, bluish grey to dark grey, areolate, forming 5-10(-20) mm wide patches on the thalli of Dimelaena oreina, with a dull black hypothallus developing among the areoles. Areoles strongly convex, constricted at base at maturity, round to angular, usually contiguous, 0.3-1 mm wide, occasionally the inner ones disintegrating. Cortex poorly differentiated, 5-15 µm thick, overlain by an up to 10 µm thick epinecral layer; medulla white, I+ pale blue. Apothecia lecideine, black, dispersed, to 0.8 mm across, round, with a convex to strongly convex disc and a soon excluded proper margin. Epithecium violet-brown, K+ purple-red or K-; hymenium colourless, 100-140 µm high, K/I+ blue; paraphysoids branched and anastomosing, 1-1.5 µm thick at mid-level, the apical cells capitate; hypothecium brown-black. Asci 8-spored, clavate, fissitunicate, with a well-developed tholus that is K/I- in lower part and K/I+ blue near the apex, lacking an ocular chamber, Rhizocarpon-type. Ascospores muriform, with 5-7 cells visible in optical view, brown-black and almost opaque, ellipsoid, 16-22 x 9-12 µm, halonate at least when young. Photobiont chlorococcoid. Spot tests: medulla K-, C-, KC-, P-. Chemistry: without lichen substances.
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Subcontinental: restricted to areas with a dry-subcontinental climate (e.g. dry Alpine valleys, parts of Mediterranean Italy)
paras Dimelaena oreina
Commonnes-rarity: (info)
Alpine belt: extremely rare
Subalpine belt: rare
Montane belt: 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
Einar Timdal - Source: http://nhm2.uio.no/lav/web/index.html - CC BY-NC
Detail from: https://gzu.jacq.org/GZU000288986
GZU000288986 - Poelt,Josef Lichenes Alpium 100 Date 1958-07
Location Austria / Tirol
Label Samnaungruppe, Tirol: Steilfläche des großen Blockes am Kölner Haus auf Comperdell ; Alt. 2000 m
Habitat
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Subcontinental: restricted to areas with a dry-subcontinental climate (e.g. dry Alpine valleys, parts of Mediterranean Italy)
paras Dimelaena oreina
Commonnes-rarity: (info)
Alpine belt: extremely rare
Subalpine belt: rare
Montane belt: 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
Einar Timdal - Source: http://nhm2.uio.no/lav/web/index.html - CC BY-NC
