Ramboldia insidiosa (Th. Fr.) Hafellner

in Hafellner & Türk, Carinthia, 2, 185/105: 624, 1995. Basionym: Lecidea insidiosa Th. Fr. - Bot. Not.: 153, 1867.
Synonyms: Nesolechia erichsenii Räsänen
Distribution: N - Ven (Nascimbene & Caniglia 2000, 2003c, Thor & Nascimbene 2007), TAA (Nascimbene & al. 2006e, 2022), Lomb. C - Sar. S - Bas (CLU 17854).
Description: Thallus crustose, growing on Lecanora varia, at first apparently not lichenized and appearing as a blackening of the host, later forming a granulose to rimose, greenish brown, independent thallus with I+ violet hyphae. Apothecia lecideine/biatorine, black (often with a blue-greenish tinge when wet), at first punctiform, then expanded and more or less sessile, 0.2-0.6 mm across, with a convex disc and a somewhat paler, thin, soon excluded proper margin. Proper exciple prosoplectenchymatous, of radiating, branched and anastomosing hyphae, greenish brown in outer part, paler within; epithecium dark green, N+ purple-red, with small brown crystals soluble in K; hymenium colourless, 40-60 µm high; paraphyses strongly coherent, mostly simple, 1-2 µm thick at mid-level, the apical cells clavate and to 3 µm wide, often with a dark cap; hypothecium colourless, pale green or pale brown. Asci 8-spored, clavate, the tholus with a strongly amyloid lateral part, a non-amyloid broadly diverging axial mass with a thick, non-amyloid cap above, and a weakly amyloid outer layer Lecanora-type. Ascospores 1-celled, hyaline, ellipsoid, 8-12 x 4.5-5.5(-8) µm. Photobiont chlorococcoid. Spot tests: all negative (but usually difficult to distinguish from those of the host). Chemistry: thallus without lichen substances.
Note: obligately lichenicolous on Lecanora varia, on hard lignum, more rarely on smooth, hard bark, most frequent in the Alps; the material from Sardinia on Protoparmeliopsis muralis, is worthy of further study. It is included in the Italian red list of epiphytic lichens as “Vulnerable” (Nascimbene & al. 2013c).
Growth form: Crustose
Substrata: bark and lignum
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
paras Lecanora varia

Commonnes-rarity: (info)

Alpine belt: absent
Subalpine belt: very rare
Oromediterranean belt: absent
Montane belt: very 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

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



Pier Luigi Nimis CC BY-SA 4.0
TSB 41132



P.L. Nimis CC BY-SA 04
TSB 37140



P.L. Nimis CC BY-SA 04
TSB 37140



P.L. Nimis CC BY-SA 04
TSB 37140



P.L. Nimis CC BY-SA 04
TSB 37140



P.L. Nimis CC BY-SA 04
TSB 37140



P.L. Nimis CC BY-SA 04
TSB 37140



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (11869)
2001/11/26
black apothecia sitting on the host, Lecanora varia


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