Phacothecium varium (Tul.) Trevis.

Phacothecium varium (Tul.) Trevis.

Linnaea, 27: 298, 1856. Basionym: Phacopsis varia Tul. - Ann. Sci. Nt. Bot., sèr. 2, 17: 125, 1852.

Synonyms: Arthonia varia (Tul.) Jatta; Celidium varium (Tul.) Körb.; Lecidea physciaria Nyl.; Leciographa physciaria (Nyl.) H. Olivier; Opegrapha physciaria (Nyl.) D. Hawksw. & Coppins

Distribution: N - Lomb (Brackel 2016), Emil (Brackel 2016), Lig (TSB 33405, Brackel 2016). C - Tosc (Herb. von Brackel 1355), Laz (Brackel & Puntillo 2016, Brackel 2016), Abr (Brackel & Puntillo 2016, Brackel 2016), Mol (Brackel 2020), Sar (Brackel & Berger 2019). S - Camp (Brackel 2016, 2021), Pugl (Brackel 2016), Cal (Brackel & Puntillo 2016, Brackel 2016), Si (Nimis & al. 1994, Grillo & al. 2002, Grillo & Caniglia 2004, Hafellner 2009, Brackel 2016).

Description: Thallus inapparent, not lichenized, the hyphae developing within the thalli of Xanthoria-species. Apothecia black, distinctly hemiangiocarpic, aggregated into dense clusters of 1-5, at first round and with a slit-like disc, then becoming irregular or lobed, the exposed discs separated by sharp excipular margin, up to 0.7 x 0.2 mm. Proper exciple carbonized, laterally 20-30 μm thick, extending below the hymenium, K-; epithecium brown, K-; hymenium colourless, 60-70 μm high, I+ red, K/I+ blue; hypothecium colourless to pale brown, 30-50 μm high. Asci (4-6)8-spored, fissitunicate, cylindrical-clavate, with a reduced ocular chamber, and a I-, K/I- wall, without a hemiamyloid apical ring. Ascospores 3-septate, hyaline, oblong or slightly tapering towards one end, (12-)14-17 x (4-)5-6(-7) μm, surrounded by a thin gelatinous sheath, with a brownish verruculose ornamentation when mature. Pycnidia black, ellipsoid to spherical. Microconidia rod-shaped, 4-7 x c. 1 μm. Photobiont absent. Spot tests: K-, C-, KC-, P-. Chemistry: without lichen substances.

Note: a lichenicolous fungus growing on species of Xanthoria; certainly more widespread in Italy.

Growth form: Lichenicolous fungus

Substrata: bark and rocks

Reproductive strategy: mainly sexual

paras Xanthoria spp.

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: extremely rare

Submediterranean belt: absent

Padanian area: absent

Humid submediterranean belt: very 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

PL Nimis

TSB 33406 on Rusavskia elegans

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

Herbarium: TSB (33406)
2003/01/23
on the host, Xanthoria elegans

Walter Obermayer CC BY-SA 4.0 - Source: Lichens of Noricum - http://lichens-of-noricum.uni-graz.at/

Walter Obermayer CC BY-SA 4.0 - Source: Lichens of Noricum - http://lichens-of-noricum.uni-graz.at/

Walter Obermayer CC BY-SA 4.0 - Source: Lichens of Noricum - http://lichens-of-noricum.uni-graz.at/

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1225&lang=en

France, Crozon

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1225&lang=en

France, Crozon

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1225&lang=en

France, Crozon
on Xanthoria parietina

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1225&lang=en

France, Crozon
on Xanthoria parietina

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1225&lang=en

France, Crozon
on Xanthoria parietina

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1225&lang=en

France, Crozon
on Xanthoria parietina

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1225&lang=en

France, Crozon
on Xanthoria parietina

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1225&lang=en

France, Crozon
on Xanthoria parietina

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1225&lang=en

France, Crozon
on Xanthoria parietina

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1225&lang=en

France, Crozon
on Xanthoria parietina

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