Français English

Acarospora fuscata (Nyl.) Arnold

Synonyms:

Family: ACARASPORACEAE

Habitat: Ubiquitous

Description

     Thallus areolate-squamulose, wide spreading and often forming extensive patches, rarely scattered; areoles 1-3 mm wide, very variable, mostly contiguous to each others, irregular in shape, flat, at times sub-lobulate or weakly imbricate (crushed flower-like), surface uneven, irregular, pale to dark red, brown-red ochre or yellow-brown, often with black margins. Apothecia 0.2-1 mm diam., mostly 1 per areole but  possibly 1-5) per areole, at first punctiform, later concave or flat, usually angular or irregular, immersed, or very slightly protruding, disk red-brown to black, usually darker than the thallus, making easy to locate reproductive bodies. Ascus in club-shape, 130 x 30 µm according to our mesurements. Ascospores 4-6 x 1-1.5 µm, narrowly ellipsoid or cylindrical.  Photobiont: Chlorococcales. Thallus: C+ red, K- , KC+ red, Pd-. Nitrophilic, not especially maritime species but often found on nutrient-enriched siliceous bird-perching rocks mainly inland. N.B. Seems to be more or less parasite, at least during early life, of other nitrophilic saxicolous lichens.  Cf. Acarospora impressula with unlobate areoles and displaying negative chemical reactions and most often coastal in our prospection area, and Acarospora subrufula strictly costal and  K+ red-wine.*







Acarospora fuscata Pointe du Millier 2
Bernard BOUFFINIER



Acarospora fuscata Pointe de Dinan
Bernard BOUFFINIER



Acarospora fuscata Pointe du Millier 1
Bernard BOUFFINIER



Acarospora fuscata Asque Lugol Ardennes 1
Jacques HAINE



Acarospora fuscata Roc'h Trévézel
Bernard BOUFFINIER



Acarospora fuscata Tréfeuntec 1
Bernard BOUFFINIER



Acarospora fuscata Tréfeuntec 2
Bernard BOUFFINIER



Acarospora fuscata Roc'h Trédudon
Alain GERAULT



Acarospora fuscata HĂ´pital-Camfrout
Bernard BOUFFINIER



Acarospora fuscata Commana 2
Bernard BOUFFINIER



Acarospora fuscata Pointe du Millier 3
Bernard BOUFFINIER



Acarospora fuscata Pointe du Millier 4
Bernard BOUFFINIER



Acarospora fuscata Pointe du Millier 5
Bernard BOUFFINIER



Acarospora fuscata Pointe de Tréberon
Bernard BOUFFINIER



Acarospora fuscata Bodvarec
Bernard BOUFFINIER



Acarospora fuscata Trez Bihan
Bernard BOUFFINIER



Acarospora fuscata Asque et paraphyses Bleu Coton Kergoat 1
Jacques HAINE



Acarospora fuscata Asque et paraphyses Bleu Coton Kergoat 2
Jacques HAINE



Acarospora fuscata Asque et paraphyses Eau Kergoat 3
Jacques HAINE



Return
Content : Alain Gérault - Website development : Sylvain Ard - Hosting : Online.net