Porina oleriana (A. Massal.) Lettau

Hedwigia, 52: 105, 1912. Basionym: Sagedia oleriana A. Massal. - Symmicta Lich.: 95, 1855.
Synonyms: Pseudosagedia oleriana (A. Massal.) Hafellner & Kalb
Distribution: N - VG (Tretiach 1997, Tretiach & Rinino 2006), Ven, Lomb. C - Tosc (TSB 35269), Abr (Tretiach 2015o, Gheza & al. 2021), Sar (TSB 13927). S - Camp (Aprile & al. 2003b, Nimis & Tretiach 2004), Pugl (Nimis & Tretiach 1999), Bas (Nimis & Tretiach 1999), Cal (Puntillo 1996), Si (Nimis & al. 1994).
Description: Thallus crustose, endolithic or more frequently thinly epilithic, reddish brown, almost continuous or finely cracked in older parts, adjacent thalli often separated by a black line. Perithecia black, 0.2-0.4 mm across, c. one third-immersed. Involucrellum of thick-walled, more or less elongated cells, violaceous brown to black, adhering to the exciple and reaching the base of the perithecium; exciple colourless to pale brown; hamathecium of simple paraphyses; hymenial gel I-, K/I-. Asci 8-spored, clavate-cylindrical, thin-walled throughout, functionally unitunicate, dehiscent by rupture of the apex, with no extruded inner layers, I-, K/I-. Ascospores transversely (6-)7-11(-12) septate, hyaline, narrowly fusiform, with one end usually broader than the other, 27-55 x 3-6 µm. Photobiont trentepohlioid. Spot tests: thallus K-, C-, KC-, P-, UV-. Chemistry: thallus without lichen substances.
Note: on shaded calcareous rocks, often found with Acrocordia conoidea, but less confined to very shaded situations, most common in Tyrrhenian Italy.
Growth form: Crustose
Substrata: rocks
Photobiont: Trentepohlia
Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

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

pH of the substrata:

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(info)

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
Index Fungorum GBIF


P.L. Nimis CC BY-SA 04
TSB 21324



P.L.Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (38331)
2008.02.25



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (21324)
2001/11/29


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_3/Porina_oleriana.htm
France, sept. 2017 - île Sainte-Marguerite, Cannes - Alpes-Maritimes


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_3/Porina_oleriana.htm
France, sept. 2017 - île Sainte-Marguerite, Cannes - Alpes-Maritimes