Rhizocarpon saanaense Räsänen

Ann. Soc. Zool.-Bot. Fenn. Vanamo, 16: 61, 1942.
Synonyms: Rhizocarpon fruticosum Räsänen; Rhizocarpon sublucidum Räsänen?
Distribution: N - Frl (Tretiach & Hafellner 2000), TAA, Lomb, Piem (Isocrono & al. 2004, Isocrono & Piervittori 2008), VA (Piervittori & Isocrono 1999), Lig.
Description: Thallus crustose, episubstratic, areolate, yellowish white, farinose, delimited by a black prothallus, forming patches 0.5-5 cm in diam. Areoles contiguous, 0.4-2 mm wide, 0.2-0.7 mm thick, usually strictly angular, often with concave sides, flat to slightly convex, matt. Cortex poorly differentiated, 20-50 µm thick; medulla white, I+ dark blue. Apothecia lecideine, black, 0.3-1 mm across, round to weakly angular, with a flat to slightly convex disc, and a thin, often persistent proper margin. Proper exciple (in outer part) and epithecium reddish brown, K+ reddish-violet; hymenium colourless, 140-220 µm high; apical cells of paraphysoids clavate; hypothecium brown 100-250 µm high, K-. Asci 8-spored, clavate, fissitunicate, with a well-developed tholus, lacking an ocular chamber, Rhizocarpon-type. Ascospores muriform, with 12-20 cells visible under the microscope, brown, ellipsoid, 25-40(-50) x 12-17(-21) µm. Photobiont chlorococcoid. Spot tests: medulla K-, C-, KC-, P- or P+ faintly reddish-violet. Chemistry: rhizocarpic acid and an unknown substance.
Note: an arctic-alpine, probably circumpolar lichen found on slightly calciferous siliceous rocks with a late snow-lie, probably restricted to the Alps, with optimum above treeline.
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: rather 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


Felix Schumm - CC BY-SA 4.0
[12235], Spain: Cordillera Cantábrica, Asturias, Provincia de Oviedo, northern slope of Peña Ubiña above Páramo, rocky outcrops in subalpine heathland with Juniperus comunis L. subsp. nana Syme, Ulex europaeus L., Vaccinium uliginosum L. etc., developing rather monotypic mosaics on open, largely horizontal, fairly smooth leges of slate, rarely accompanied by scanty representatives of thr Rhizocarpion alpicolae Frey ex Klem., about 1700 m, without marked orientation, abundant. Leg. et det. G. Follman & M. Schulz, 08.1983. EX G. FOLLMANN ET B. C. WERNER: LICHENES EXSICCATI AB ISTITUTO BOTANICO UNIVERSITATIS COLONIENSES EDITI NR. 597.



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (24643)
2001/12/10


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_R/Rhizocarpon_saanaense.htm
France, Session AFL 2010 - Col d'Ourtigas - Hérault



Juri Nascimbene - CC BY-SA 4.0
Mt. Adamello (Alps), Italy
2006


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_R/Rhizocarpon_saanaense.htm
France, Session AFL 2010 - Col d'Ourtigas - Hérault


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_R/Rhizocarpon_saanaense.htm
France, Session AFL 2010 - Col d'Ourtigas - Hérault



Felix Schumm - CC BY-SA 4.0
[2923], Spanien, Südspanien, Prov. León: großfleckig an glatten, dunklen, licht- und windoffenen Steil- und Stirnflächen von silikatischem Schichtgestein im Umbilicarietum cylindricae Frey, 1200 m, SE, pH 5.1, Steilstufen in der Sierra de Riaño südwestlich Portilla de la Reina am Südabfall der Picos de Europa. Leg. G.Follman, 07.1981, det. Tassilo Feuerer, 02.1982. EX G. FOLLMANN: LICHENES EXSICCATI SELECTI A MUSEO HISTORIAE NATURALIS CASSELENSI EDITI NR. 378.



Felix Schumm - CC BY-SA 4.0
[2923], Spanien, Südspanien, Prov. León: großfleckig an glatten, dunklen, licht- und windoffenen Steil- und Stirnflächen von silikatischem Schichtgestein im Umbilicarietum cylindricae Frey, 1200 m, SE, pH 5.1, Steilstufen in der Sierra de Riaño südwestlich Portilla de la Reina am Südabfall der Picos de Europa. Leg. G.Follman, 07.1981, det. Tassilo Feuerer, 02.1982. EX G. FOLLMANN: LICHENES EXSICCATI SELECTI A MUSEO HISTORIAE NATURALIS CASSELENSI EDITI NR. 378.



Felix Schumm - CC BY-SA 4.0
[12235], Spain: Cordillera Cantábrica, Asturias, Provincia de Oviedo, northern slope of Peña Ubiña above Páramo, rocky outcrops in subalpine heathland with Juniperus comunis L. subsp. nana Syme, Ulex europaeus L., Vaccinium uliginosum L. etc., developing rather monotypic mosaics on open, largely horizontal, fairly smooth leges of slate, rarely accompanied by scanty representatives of thr Rhizocarpion alpicolae Frey ex Klem., about 1700 m, without marked orientation, abundant. Leg. et det. G. Follman & M. Schulz, 08.1983. EX G. FOLLMANN ET B. C. WERNER: LICHENES EXSICCATI AB ISTITUTO BOTANICO UNIVERSITATIS COLONIENSES EDITI NR. 597.


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_R/Rhizocarpon_saanaense.htm
France, Session AFL 2010 - Col d'Ourtigas - Hérault