Koerberia biformis A. Massal.

Geneac. Lich.: 6, 1854.
Synonyms:
Distribution: N - Frl, Ven (Lazzarin 2000b), Lomb, Lig (Giordani & Incerti 2008). C - Tosc, Marc (Frati & Brunialti 2006), Umb (Ravera 1998, Ravera & al. 2006), Laz (Ravera 2001, Massari & Ravera 2002, Ravera & Genovesi 2008), Mol (Caporale & al. 2008), Sar (Zedda 2002). S - Camp (Nimis & Tretiach 2004, Brunialti & al. 2013), Bas (Bartoli & Puntillo 1998), Cal (Puntillo 1996, Puntillo & Puntillo 2004), Si (Ottonello & al. 2011).
Description: Thallus minutely foliose, forming small rosettes, 0.5-3 cm in diam. Lobes elongate, up to 2 mm long, 0.3-0.5 mm wide, stellately radiating, dark olive-green, smooth to slightly grooved, with laminal, cylindrical, erect, up to 1 mm tall and c. 0.1 mm thick isidia. Lower surface pale olive, with tufts of pale rhizines. Apothecia frequent, deep red-brown, soon convex, 0.4-1 (-1.5) mm across. Proper margin formed by a pseudoexciple 30-60 µm wide; epithecium brownish; hymenium colourless, 65-100 µm high; hypothecium colourless, partly pseudoparenchymatous. Asci 8-spored, with a I+ blue tholus. Ascospores 1-celled, hyaline, acicular to slightly curved, spirally twisted in the asci, 35-45(-55) x 1.5-3(-4) µm. Pycnidia laminal, pyriform, with a brown ostiole. Conidia rod-shaped, 4.5-6 x c. 1 µm. Photobiont cyanobacterial (Scytonema-like) Spot tests: all negative chemistry: without lichen substances.
Note: a mild-temperate species found on rough bark, mostly of old deciduous trees, especially Castanea and Quercus, in humid areas; much rarer in the North than in Tyrrhenian Italy.
Growth form: Foliose, narrow lobed
Substrata: bark
Photobiont: cyanobacteria, filamentous (e.g. Nostoc, Scytonema)
Reproductive strategy: mainly sexual
Most common in areas with a humid-warm climate (e.g. most of Tyrrenian Italy)

Commonnes-rarity: (info)

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

pH of the substrata:

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Solar irradiation:

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Aridity:

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Eutrophication:

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Poleotolerance:

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Altitudinal distribution:

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Predictive model
Herbarium samples


P.L. Nimis CC BY-SA 04
TSB 34173



P.L. Nimis CC BY-SA 04
TSB 34173



P.L. Nimis CC BY-SA 04
TSB 34173