Cecidonia umbonella (Nyl.) Triebel & Rambold
Nova Hedwigia, 47: 284, 1988. Basionym: Lecidea umbonella Nyl. - Flora, 49: 372, 1866.
Synonyms:
Description: Thallus inapparent, growing inside the thalli of epilithic Lecidea-species, especially Lecidea lapicida, inducing the formation of white, gall-like, 4-6 mm wide, 0.3-0.4 mm high swellings. Medulla of the galls I+ blue. Apothecia lecideine, 0.3-0.5(-0.6) mm across, with an umbonate, black disc and a raised, brown-black, often cracked proper margin. Proper exciple of irregular chains of swollen cells, carbonaceous black in outer part, paler brown within, 60-120 μm thick laterally; epithecium brown to olive-brown; hymenium colourless or most often with brown vertical streaks, 70-120 μm high; paraphyses coherent, branched and anastomosing, 1.2-2 μm thick at mid-level, the apical cells 2-3(-3.5) μm wide; hypothecium pale to dark brown, 40-150 μm high. Asci 8-spored, subcylindrical-clavate, the apex thickened, with a K/I+ pale blue apical dome usually with a distinct I+ blue, shallow subapical ring, Lecidea-type. Ascospores 1-celled, hyaline, broadly ellipsoid, (10-)11-15(-16) x 6-8(-10) μm, the wall 2-layered, up to 0.8 μm thick. Pycnidia black, immersed. Conidia simple, hyaline, bacilliform, 5-9 μm long (not clear whether these are the conidia of the host lichen). Photobiont absent (the galls have a chlorococcoid photobiont). Spot tests: all negative, but the galls often react K+ yellow turning red, C-, KC-, P+ yellow. Chemistry: without lichen substances, or norstictic acid from the host.
Growth form: Lichenicolous fungus
Substrata: rocks
Reproductive strategy: mainly sexual
paras Lecidea lapicida s.lat.
Commonnes-rarity: (info)
Alpine belt: rare
Subalpine belt: 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 4.0
TSB 9418
P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (13740)
2001/12/08
on the host, Lecidea lactea
Growth form: Lichenicolous fungus
Substrata: rocks
Reproductive strategy: mainly sexual
paras Lecidea lapicida s.lat.
Commonnes-rarity: (info)
Alpine belt: rare
Subalpine belt: 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 4.0
TSB 9418
