Rhizocarpon pusillum Runemark
Opera Bot., 2: 63, 1956.
Synonyms:
Description: Thallus crustose, areolate, bright yellow-green, forming 0.3-1 cm wide patches within the thallus of Sporastatia-species, without a clear prothallus, the areoles developing from those of the host, round to angular, contiguous, the peripheral ones not elongate, slightly to strongly convex, 0.2-0.6 mm wide, smooth, sometimes slightly farinose. Cortex poorly differentiated, 40-75 µm thick; medulla white, I-. Apothecia lecideine, black, round or angular, 0.3-0.7 mm across, with a flat to convex, epruinose disc and a soon excluded proper margin. Proper exciple reddish brown in outer part, paler within, K+ purple-red; epithecium reddish brown, inspersed with black granules, K+ purple-red; hymenium colourless, 60-100 µm high; paraphysoids coherent, branched and anastomosing, the apical cells capitate; hypothecium brown, K-. 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 1-septate, at first hyaline or pale green-brown, soon becoming dark green to brown, ellipsoid, 9-15(-18) x (4-)6-7(-8) µm, halonate. Photobiont chlorococcoid. Spot tests: medulla K-, C-, KC-, P+ yellow. Chemistry: cortex with rhizocarpic acid, medulla with psoromic acid.
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
In underhangs rarely wetted by rain
paras Sporastatia spp.
Commonnes-rarity: (info)
Alpine belt: rather rare
Subalpine belt: very rare
Montane belt: absent
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
P.L. Nimis CC BY-SA 04
TSB 34345
P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (34345)
2002/01/07
Pier Luigi Nimis CC BY-SA 4.0
TSB 41145
Pier Luigi Nimis CC BY-SA 4.0
TSB 41145
Pier Luigi Nimis - CC BY-SA 4.0
TSB 38614
Pier Luigi Nimis - CC BY-SA 4.0
TSB 44047
Pier Luigi Nimis - CC BY-SA 4.0
TSB 44047
P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (34345)
2002/01/07
on the host, Sporastatia testudinea
P.L. Nimis CC BY-SA 04
TSB 34345
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
In underhangs rarely wetted by rain
paras Sporastatia spp.
Commonnes-rarity: (info)
Alpine belt: rather rare
Subalpine belt: very rare
Montane belt: absent
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
P.L. Nimis CC BY-SA 04
TSB 34345
P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (34345)
2002/01/07
Pier Luigi Nimis CC BY-SA 4.0
TSB 41145
Pier Luigi Nimis CC BY-SA 4.0
TSB 41145
Pier Luigi Nimis - CC BY-SA 4.0
TSB 38614
Pier Luigi Nimis - CC BY-SA 4.0
TSB 44047
Pier Luigi Nimis - CC BY-SA 4.0
TSB 44047
P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (34345)
2002/01/07
on the host, Sporastatia testudinea
