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Lecanora rupicola subsp. subplanata (Nyl.) Leuchert & Poelt

Synonyms:

Family: LECANORACEAE

Habitat: Aerohaline zone

Description

     Thallus crustose well defined reaching 8 cm across, heavily cracked surface, more or less rough and bumpy, chalky, limestone-white, greyish-white at first, becoming bluish-grey to greyish, black hypothallus, thin, almost visible in case of mosaïc of several individuals, or through contact with other crustose species. Apothecia numerous, immersed in the thallus, a little protruding by their margin, 1 to 2 mm in diameter, rarely sub-sessile, discs flat, whitish to cream but which may appear pale grayish to dark gray by the strong bloom which covers them, margin sinuous which may be prominent and appear in relief on the thallus, whitish or paler, entire to crenate. Simple spores, elliptic, 9-15 x 5,5-7 µm according to literature, 12-15 (18) x 5-8 µm according to our measurements. Photobiont: green algae. Thallus: C- or C+ orange, K+ yellow, P- or P+/- yellow ; apothecia disc : C- or C+ orange (because the usual bleach solution contains NaOH), KC+ orange. Species coming on siliceous rocks, with strong shore affinities, common in the xeric supra-littoral zone where it can form large colonies, occurs also in the aerohaline zone, even farer inlands.

N.B. Parasitism by Arthonia varians is very frequent, if it is easy to determine Lecanora rupicola subsp. subplanata in case of partial parasitism by its black parasitized apothecia melted with non-parasitized KC+ orange apothecia, it is harder and harder to distinguish this species in case of a thallus totally sterile because of its parasite, mostly if it is an isolated thallus far from a colony, in this case only the thallus K+ yellow reaction will orientate towards Lecanora rupicola s.l. 

N.B. Colored chemical reactions here signaled are diversely interpreted by authors and this point is quite confused, conerning for instance the specimens tested in oour prospected area (marine siliceous rocks), all were C+ orange and KC+ orange in apothecia disc, that does not exactly match with the indications given by the literature (a particular chemotype?).







Lecanora rupicola subsp. subplanata Landévennec 1
Bernard BOUFFINIER



Lecanora rupicola subsp. subplanata Landévennec 2
Bernard BOUFFINIER



Lecanora rupicola subsp. subplanata Roscanvel Kervian 2
Bernard BOUFFINIER



Lecanora rupicola subsp. subplanata Landévennec 4
Bernard BOUFFINIER



Lecanora rupicola subsp. subplanata Landévennec 5
Bernard BOUFFINIER



Lecanora rupicola subsp. subplanata Landévennec 6
Bernard BOUFFINIER



Lecanora rupicola subsp. subplanata Landévennec 7
Bernard BOUFFINIER



Lecanora rupicola subsp. subplanata Landévennec 8
Bernard BOUFFINIER



Lecanora rupicola subsp. subplanata Landévennec 9
Bernard BOUFFINIER



Lecanora rupicola subsp. subplanata Le Conquet 1
Bernard BOUFFINIER



Lecanora rupicola subsp. subplanata Le Conquet 2
Bernard BOUFFINIER



Lecanora rupicola subsp. subplanata Ouessant
Bernard BOUFFINIER



Lecanora rupicola subsp. subplanata Groix 1
Hans TOETENEL



Lecanora rupicola subsp. subplanata Roscanvel Kervian 1
Bernard BOUFFINIER



Lecanora rupicola subsp. suplanata Roscanvel 1
Jacques HAINE



Lecanora rupicola subsp. suplanata Roscanvel 2
Jacques HAINE



Lecanora rupicola subsp. suplanata Roscanvel 3
Jacques HAINE



Lecanora rupicola subsp. suplanata Coupe apothécie K + Melzer Roscanvel 4
Jacques HAINE



Lecanora rupicola subsp. subplanata Asque eau Roscanvel 5
Jacques HAINE



Lecanora rupicola subsp. subplanata Asque K + Lugol Roscanvel 6
Jacques HAINE



Lecanora rupicola subsp. subplanata Spores K + BC Roscanvel 7
Jacques HAINE



Lecanora rupicola subsp. subplanata Roscanvel Kervian 3
Bernard BOUFFINIER



Lecanora rupicola subsp. subplanata Iles Chausey 1
Bernard BOUFFINIER



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