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
Predictive model
Herbarium samples
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
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
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
Predictive model
| Herbarium samples |
Index Fungorum
GBIF
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
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
