ITALIC 7.0

Collemopsidium angermannicum (Degel.) A. Nordin

Graphis Scripta, 13: 39, 2002. Basionym: Arthopyrenia angermannica Degel. - Ark. Bot., 24A, 3: 23, 1931.

Synonyms: Arthopyrenia strontianensis Swinscow; Pyrenocollema strontianense (Swinscow) R.C. Harris

Distribution: C - Sar.

Description: Thallus crustose, episubstratic, up to 120 µm thick, smooth to finely rimose, olive-brown to dark brown, subgelatinous when wet, the hyphae vertically oriented. Perithecia scattered, black, more or less immersed in the thallus to clearly projecting, sometimes partly covered by a thin thalline layer, globose or slightly flattened at apex, often depressed dear the ostiole, 0.12-0.3 mm in diam. Involucrellum absent; exciple dark throughout or slightly paler in lower part, more or less cellular, thicker around the ostiole; hamathecium of richly branched and anastomosed pseudoparaphyses, the hymenial gel I-. Asci 8-spored, ovoid to subcylindrical, usually stalked, with two functional wall layers, K/I-, the wall thickened above, with an ocular chamber, fissitunicate, with a distinct extruded rostrum at dehiscence. Ascospores 1-septate, hyaline, ovoid to ovoid-fusiform, one cell often wider than the other, 17-26 x 6-12 µm. Pycnidia black, immersed to slightly projecting, the conidiogenous cells cylindrical, phialidic. Conidia oblong-ellipsoid, 2.9-3.3 x c. 1.2 µm. Photobiont cyanobacterial, the cells globose, 3-9 μm, or sometimes slightly elongate and up to 12 μm long, densely aggregated in irregular clusters and enclosed in yellowish to slightly brownish gelatinous sheaths. Spot tests: all negative. Chemistry: without lichen substances.

Note: on often submerged siliceous rocks along streams and along the margins of lakes; widespread in the Holarctic region, but not common. A mainly western species, reported from Sardinia; also recorded from the Western Alps (France) in sites with a untypical ecology, and therefore these records in need of confirmation.

Growth form: Crustose

Substrata: rocks

Photobiont: cyanobacteria, coccaceous (e.g. Gloeocapsa)

Reproductive strategy: mainly sexual

Periodically submerged (e.g. in creeks)

paras Verrucaria spp.

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: very rare

Submediterranean belt: absent

Padanian area: absent

Humid submediterranean belt: very rare

Humid mediterranean belt: absent

Dry mediterranean belt: absent

pH of the substrata:

1

2

3

4

5

(info)

Solar irradiation:

1

2

3

4

5

(info)

Aridity:

1

2

3

4

5

(info)

Eutrophication:

1

2

3

4

5

(info)

Poleotolerance:

0

1

2

3

(info)

Altitudinal distribution:

1

2

3

4

5

6

(info)

Predictive model

Index Fungorum GBIF

http://fungi.myspecies.info/all-fungi/collemopsidium-angermannicum - CC BY-NC

Source: http://fungi.myspecies.info/all-fungi/collemopsidium-angermannicum - CC BY-NC