Opegrapha vermicellifera (Kunze) J.R. Laundon

Lichenologist, 2: 139, 1963. Basionym: Pyrenotea vermicellifera Kunze in Reichenbach & Schubert - Lich. Exs.: nr. 60, 1823.
Synonyms: Opegrapha fuscella (Fr.) Almb.; Opegrapha hapaleoides Nyl.; Opegrapha leptospora Werner & M. Choisy; Opegrapha mehdiensis Werner
Distribution: N - VG (Tretiach 2015m), Lomb (Valcuvia & Truzzi 2007, 2007b), Piem (Valcuvia 2002, 2002b), Emil (TSB 7994). C - Laz, Sar (Zedda 2002). S - Pugl (Nimis & Tretiach 1999), Bas (Bartoli & Puntillo 1998), Cal (Puntillo 1995, 1996, Puntillo & Puntillo 2012).
Description: Thallus crustose, thin, forming large patches to 12 cm across, smooth or minutely rimose, pale grey to almost white, the fertile form grey-ochre, the sterile form more whitish. Apothecia rare, lirelliform, confined to restricted areas on the thallus, 0.6-1.2 x 0.1-0.3 mm, most often simple and isolated, rarely furcate or stellate in small clusters, half immersed, with a slit-shaped disc and a black to slightly grey-pruinose exciple. Epithecium brown; hymenium colourless, 50-60 µm tall, non-amyloid. Asci 8-spored, clavate-cylindrical, fissitunicate. Ascospores 4-7-septate, hyaline, markedly elongate with pointed ends, 15-25(-30) x 3-4 µm. Pycnidia often abundant (in sterile forms), 0.15-0.25 mm diam., regularly distributed, immersed at first and appearing as brown punctiform ostioles, later prominent, appearing as white-pruinose, to 0.4 mm tall warts. Conidia straight, bacilliform, hyaline, 3-7 x 1-1.5 µm. Spot tests: K-, C- , KC-, P-, UV-. Chemistry: no lichen substances.
Note: a mild-temperate lichen found on old trees in humid areas, especially near large rivers, on faces seldom wetted by rain.
Growth form: Crustose
Substrata: bark
Photobiont: Trentepohlia
Reproductive strategy: mainly sexual
In underhangs rarely wetted by rain

Commonnes-rarity: (info)

Alpine belt: absent
Subalpine belt: absent
Oromediterranean belt: absent
Montane belt: absent
Submediterranean belt: extremely rare
Padanian area: absent
Humid submediterranean belt: rare
Humid mediterranean belt: absent
Dry mediterranean belt: absent


pH of the substrata:

(info)

1

2

3

4

5

Solar irradiation:

(info)

1

2

3

4

5

Aridity:

(info)

1

2

3

4

5

Eutrophication:

(info)

1

2

3

4

5

Poleotolerance:

(info)

0

1

2

3

Altitudinal distribution:

(info)

1

2

3

4

5




P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (3996)
2001/12/15
thallus with white pycnidia


P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (7580)
2001/12/15
pycnidium


P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (5237)
2001/11/27


E. Pittao; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (5237)
2008.03.13


E. Pittao; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (23020)
2008.03.13


E. Pittao; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (9353)
2008.03.13


E. Pittao; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (23028)
2008.03.13


Domenico Puntillo; Owner: Domenico Puntillo
Italy


Domenico Puntillo; Owner: Domenico Puntillo
Italy


Leif Stridvall - Source: http://www.stridvall.se/la/galleries.php


Felix Schumm – CC BY-SA 4.0
[4209], Germany, Baden-Württemberg, Kreis Schwäbisch Gmünd, im Beutenbachtal bei der Beutenmühle ca. 3 km südöstlich von Lorch, ca 310 m, an Quercus, TK: 7224. Leg. F. Schumm, 29.05.1995.


Felix Schumm – CC BY-SA 4.0
[4209], Germany, Baden-Württemberg, Kreis Schwäbisch Gmünd, im Beutenbachtal bei der Beutenmühle ca. 3 km südöstlich von Lorch, ca 310 m, an Quercus, TK: 7224. Leg. F. Schumm, 29.05.1995.


Felix Schumm – CC BY-SA 4.0
[4209], Germany, Baden-Württemberg, Kreis Schwäbisch Gmünd, im Beutenbachtal bei der Beutenmühle ca. 3 km südöstlich von Lorch, ca 310 m, an Quercus, TK: 7224. Leg. F. Schumm, 29.05.1995.


Felix Schumm – CC BY-SA 4.0
[4209], Germany, Baden-Württemberg, Kreis Schwäbisch Gmünd, im Beutenbachtal bei der Beutenmühle ca. 3 km südöstlich von Lorch, ca 310 m, an Quercus, TK: 7224. Leg. F. Schumm, 29.05.1995.


Felix Schumm – CC BY-SA 4.0
[4209], Germany, Baden-Württemberg, Kreis Schwäbisch Gmünd, im Beutenbachtal bei der Beutenmühle ca. 3 km südöstlich von Lorch, ca 310 m, an Quercus, TK: 7224. Leg. F. Schumm, 29.05.1995.


Felix Schumm – CC BY-SA 4.0
[4209], Germany, Baden-Württemberg, Kreis Schwäbisch Gmünd, im Beutenbachtal bei der Beutenmühle ca. 3 km südöstlich von Lorch, ca 310 m, an Quercus, TK: 7224. Leg. F. Schumm, 29.05.1995.


Felix Schumm – CC BY-SA 4.0
[4209], Germany, Baden-Württemberg, Kreis Schwäbisch Gmünd, im Beutenbachtal bei der Beutenmühle ca. 3 km südöstlich von Lorch, ca 310 m, an Quercus, TK: 7224. Leg. F. Schumm, 29.05.1995.