Opegrapha niveoatra (Borrer) J.R. Laundon

Opegrapha niveoatra (Borrer) J.R. Laundon

Lichenologist, 2: 138, 1963. Basionym: Verrucaria niveoatra Borrer in Hooker & Sowerby - Engl. Bot. Suppl. 1: 2637, 1831.

Synonyms: Opegrapha amphotera Nyl.; Opegrapha dubia Leight. ex Arnold; Opegrapha reticulata DC.; Opegrapha subsiderella (Nyl.) Arnold; Opegrapha subsiderella f. rubella B. de Lesd.; Opegrapha vulgata var. subsiderella Nyl.

Distribution: N - Ven (Thor & Nascimbene 2007), TAA (Thor & Nascimbene 2007, Nascimbene & al. 2007b, 2014, 2022, Nascimbene 2014, Nascimbene & Marini 2015, Nimis & al. 2015, Trindade & al. 2021), Emil (Nimis & al. 1996, Fariselli & al. 2020), Lig (Watson 2014). C - Tosc (Brunialti & Frati 2010, Brackel 2015), Marc (Nimis & Tretiach 1999), Laz (Ravera & al. 1999, 2000, Munzi & al. 2007, Zucconi & al. 2013), Abr (Caporale & Pagliani 2010), Sar (Zedda 2002, Rizzi & al. 2011, Di Nuzzo & al. 2022). S - Camp (Aprile & al. 2003b), Pugl (Nimis & Tretiach 1999), Cal (Puntillo 1996, Puntillo & Puntillo 2004), Si (TSB 17354).

Description: Thallus crustose, thin smooth, continuous to rimose, white, greyish white or pale ochre-coloured, sometimes inconspicuous, without a distinct prothallus. Apothecia black, lirelliform, 0.3-0.7(-1.5) x 0.1-0.3 mm, half-immersed in the thallus, simple to rarely stellate, usually sinuous, with a slit-like, epruinose disc partly slightly widened with age. Exciple black, closed below the hymenium; epithecium brown; hymenium colourless, 45-70 µm high, I+ reddish; paraphysoids branched and anastomosing, c. 1 µm thick, the apical cells hardly swollen; subhymenium brownish; hypothecium brown-black to black, carbonized. Asci 8-spored, cylindrical-clavate, the inner layer of the endoascus amyloid throughout, the apical ring hardly visible, Vulgata-type. Ascospores 4-7(-8)-septate, hyaline, acicular to fusiform, straight or slightly curved, (18-)20-27(-32) x 2-4.5 µm, with a thin, poorly evident gelatinous perispore. Pycnidia numerous, black, epruinose, immersed or subimmersed. Conidia curved, worm-like, of two sizes: 3-7 x 1-1.5 µm, and 6-8.5 x 0.7-1 µm. Photobiont trentepohlioid. Spot tests: thallus K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: a mild-temperate lichen found on old trees in open woodlands, mainly Tyrrhenian in Italy; closely related to O. vulgata, but differing in the shorter conidia.

Growth form: Crustose

Substrata: bark

Photobiont: Trentepohlia

Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: extremely rare

Submediterranean belt: extremely rare

Padanian area: absent

Humid submediterranean belt: rare

Humid mediterranean belt: very rare

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

Herbarium samples

P.L. Nimis CC BY-SA 4.0

TSB 38290

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste

Herbarium: TSB (23097)
2001/11/27

P.L.Nimis; Owner: Department of Life Sciences, University of Trieste

Herbarium: TSB (38290)
2008.02.23

Domenico Puntillo; Owner: Domenico Puntillo

Italy

Domenico Puntillo; Owner: Domenico Puntillo

Italy

Felix Schumm – CC BY-SA 4.0

[14950], Germany, Baden-Württemberg, Kreis Göppingen, Faurndau, Friedof, 48,70390° N, 9,61455° E, 314 m. Leg. 18.09.2009

Felix Schumm – CC BY-SA 4.0

[14950], Germany, Baden-Württemberg, Kreis Göppingen, Faurndau, Friedof, 48,70390° N, 9,61455° E, 314 m. Leg. 18.09.2009

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

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_O/Texte_O/Opegrapha_niveoatra.htm

France, 22/5/2014 - sur écorce de Cupressus, ouvrage du Libron - Hérault

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_O/Texte_O/Opegrapha_niveoatra.htm

France, 22/5/2014 - sur écorce de Cupressus, ouvrage du Libron - Hérault

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_O/Texte_O/Opegrapha_niveoatra.htm

France, 22/5/2014 - sur écorce de Cupressus, ouvrage du Libron - Hérault

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_O/Texte_O/Opegrapha_niveoatra.htm

France, 22/5/2014 - sur écorce de Cupressus, ouvrage du Libron - Hérault

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_O/Texte_O/Opegrapha_niveoatra.htm

France, 24/5/2018 - sur Abies - forêt de Touche, Villard-de-Lans - Drôme

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_O/Texte_O/Opegrapha_niveoatra.htm

France, 24/5/2018 - sur Abies - forêt de Touche, Villard-de-Lans - Drôme

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_O/Texte_O/Opegrapha_niveoatra.htm

France, 24/5/2018 - sur Abies - forêt de Touche, Villard-de-Lans - Drôme

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_O/Texte_O/Opegrapha_niveoatra.htm

France, 24/5/2018 - sur Abies - forêt de Touche, Villard-de-Lans - Drôme

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=582&lang=en

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Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=582&lang=en

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