Psoronactis dilleniana (Ach.) Ertz & Tehler

in Ertz & al., Fungal Divers., 70: 46, 2014. Basionym: Lichen dillenianus Ach. - Lichenogr. Suec. Prodr.: 57, 1798.
Synonyms: Lecanactis dilleniana (Ach.) Körb.; Schismatomma epipolium A. Massal.
Distribution: N - TAA (Lojka Lich. Univ. 86: Egea & Torrente 1994, Nascimbene & al. 2022), Piem (Pistocchi & al. 2026), Lig. C - Tosc. S - Camp (Ricciardi & al. 2000).
Description: Thallus crustose, episubstratic, up to 3 mm thick, more or less effuse, somewhat tomentose-scurfy, ecorticate, soft, areolate to verrucose, whitish to very pale grey, more or less tinged mauve-pink or pink-orange, sometimes delimited by a thin dark prothallus. Medulla white, I+ blue. Apothecia immersed to subsessile, constricted at base, (0.4-)0.6-1.5(-2) mm wide, round, angular or more rarely elongate, with a more or less exposed, black but often grey-pruinose, flat to convex disc and a raised, blackish, epruinose, persistent proper margin. Proper exciple dark brown, K+ olivaceous green; epithecium brown; hymenium colourless, 70-100 µm thick, I+ red; paraphysoids mostly simple, 1.5-2 μm thick, with slightly enlarged apical cells; subhymenium 15-25 µm high, brownish, K+ olivaceous green, I+ blue; hypothecium black, carbonized, up to 280 µm thick. Asci 8-spored, cylindrical-clavate, fissitunicate, the apex with a K/I+ pale blue apical dome penetrated by a small ocular chamber. Ascospores 3-septate, fusiform, straight or slightly curved, 18-35(-40) x 4-5 µm. Pycnidia rare, black, semi-immersed, with a dark brown wall. Conidia bacilliform, straight, 5-8 x 1-1.5 µm. Photobiont trentepohlioid. Spot tests: thallus K-, C-, KC-, P+ yellow-orange; medulla UV+ glaucous or yellowish grey. Chemistry: psoromic and 2’-0-demethylpsoromic acids, plus variable amounts of schizopeltic acid.
Note: on hard crystalline rocks, beneath overhangs and in crevices which are seldom wetted by rain, mostly in upland areas.
Growth form: Crustose
Substrata: rocks
Photobiont: Trentepohlia
Reproductive strategy: mainly sexual
In underhangs rarely wetted by rain

Commonnes-rarity: (info)

Alpine belt: very rare
Subalpine belt: very rare
Oromediterranean belt: absent
Montane belt: extremely rare
Submediterranean belt: absent
Padanian area: absent
Humid submediterranean belt: absent
Humid mediterranean belt: absent
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
INDEX FUNGORUM GBIF DOLICHENS

Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder
Central Europe: Germany. (Coll/ident: D. Teuber).



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (32833)
2002/12/13
sterile thallus



Pier Luigi Nimis CC BY-SA 4.0
TSB 41614



Curtis Randall Björk – CC BY-SA 4.0
British Columbia, Clearwater Valley Date: 2013-10-02 Basalt cliff in waterfall sprayzone, north-facing



Pier Luigi Nimis CC BY-SA 4.0
TSB 41615



Pier Luigi Nimis CC BY-SA 4.0
TSB 41615


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=231&lang=en
France, Pointe de Dinan


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=231&lang=en
France, Pointe de Dinan


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=231&lang=en
France, Pointe de Dinan


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=231&lang=en
France, Pointe de Dinan


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=231&lang=en
France, Pointe de Dinan


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=231&lang=en
France, Pointe de Dinan


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=231&lang=en
France, Pointe de Dinan


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=231&lang=en
France, Pointe de Dinan



Pier Luigi Nimis CC BY-SA 4.0
TSB 41615



Felix Schumm - CC BY 4.0
[VZ1276], Hungaria. Montes Matra, in rupibus Saskö dictis, in redione montis Kakes, 880 m. Ad saxa andesitica locis umbrosis. Leg. A. Kiszely et A. Vezda, 6.4.1974. EX A. VEZDA LICHENES SELECTI EXSICCATI NR. 1276. - As Lecanactis dilleniana



Felix Schumm - CC BY 4.0
[VZ1276], Hungaria. Montes Matra, in rupibus Saskö dictis, in redione montis Kakes, 880 m. Ad saxa andesitica locis umbrosis. Leg. A. Kiszely et A. Vezda, 6.4.1974. EX A. VEZDA LICHENES SELECTI EXSICCATI NR. 1276. - As Lecanactis dilleniana