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Sarcogyne regularis Körb. var. regularis

Synonyms:

Sarcogyne pruinosa  s.l. pp.



Family: ACAROSPORACEAE

Habitat: Ubiquitous

Description

    Thallus very thin, evanescent and inconspicous, pale greyish, dull whitish. Apothecia inserted in crevices of substratum or slightly immersed, 1-1.5 mm diam., disc brown-red to blackish when dry, dark brown-red when moist, sometimes powdery and bluish, exciple soon excluded. Ascii club-shaped, ± 100-spored, 60-85 x 14-18 µm according to literature, 45-60 x 15-25 µm according to our measures. Ascospores ellipsoid, simple, 3-5 x 1,5-2 µm according to literature, 3-4 x 1,5-2 µm according to our measures. Hamathecium of paraphyses, simple to sparsely branched, regularly septate. Photobiont: Myrmercia. Chemical spot tests negative. Common on calcareous rocks and rough mortar of old walls, sometimes on concrete.  See Cf. Sarcogyne clavus maritime that grows on coastal siliceous rocks with apothecia, 1-4 mm diam., disc not pruinose and exciple crenulate. See also Sarcogyne privigna  of which the apothecia have a persistent exciple more or less irregular but not crenulate and that grows on granite. On mortar, not to be confused with Clauzadea monticola of which the apothecia are more globose and contain 8-spored asci. N.B. This species is highly variable and many varieties have been described. Here we also described Sarcogyne regularis var. intermedia of which the disc of apothecia is pruinose blue.







Sarcogyne regularis Monthermé 1
Jacques HAINE



Sarcogyne regularis Monthermé 2
Jacques HAINE



Sarcogyne regularis Monthermé 3
Jacques HAINE



Sarcogyne regularis Landévennec 6
Jacques HAINE



Sarcogyne regularis Sur vieux mur. Bieuzy
Bernard BOUFFINIER



Sarcogyne regularis Sur vieux mur. Port Merrien
Bernard BOUFFINIER



Sarcogyne regularis Sur vieux mur. Pointe du Raz
Bernard BOUFFINIER



Sarcogyne regularis Sur vieux mur. Cast.
Bernard BOUFFINIER



Sarcogyne regularis Asque eau Landévennec 1
Jacques HAINE



Sarcogyne regularis Asques et paraphyses Bleu Coton Landévennec 2
Jacques HAINE



Sarcogyne regularis Spores et paraphyses Bleu Coton Landévennec 3
Jacques HAINE



Sarcogyne regularis Sur le mortier d'un mur Landévennec 4
Jacques HAINE



Sarcogyne regularis Sur le mortier d'un mur Landévennec 5
Jacques HAINE



Sarcogyne regularis Asque Lugol Monthermé 4
Jacques HAINE



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