Français English

Arthonia anglica Coppins

Arthonia anglica Coppins

Synonyms:

Family: ARTHONIACEAE

Habitat: Oceanic zone

Description

   Thallus crustose, immersed in the bark, 5-8 cm at its greatest length, smooth, light pinkish-brown, whitish slightly tinged with pinkish-brown, pale brownish, parfois teinté de pourpre autour des apothécies dans la viellesse, delimited by a brownish hypothallus. Apothecia numerous, not pruinose, most often in very irregular stars, reddish-brown, blackish-brown, blackish, often with a projecting border formed by an outgrowth of the thallus. Ascospores colorless if young, brownish and rough if old, long ovoid, 3-4 times septate, with one end wider (club-shaped or ice-cream cone), 15-22 x 5-7 µm according to the literature, 15- 25 x 7-9 µm according to our measurements. Photobiont: Trentepohlia. Thallus: C-, K-, KC-, P- UV-, but an apothecia cut is C+ fleeting pink (presence of gyrophoric acid) this reaction can be observed (sometimes with difficulty!) in the field by a pink reaction fleeting around the apothecia in the presence of C but more persistent with KC (in the form of a reddish halo around the apothecia). Quite rare oceanic species (but probably confused) found on smooth-barked trees in woodlands and humid forests.

Easy to confuse (and probably confused!) with:

Synarthonia (Arthonia) astroidestera  which differs by its orange bloom under UV rays and C-;

Arthonia radiata whose apothecia are not C+ pink and whose spores do not have an enlarged apex.

Coniocarpon cuspidans whose apothecia are reddish and K+ red. 





Arthonia anglica Coppins

Arthonia anglica Dineault 1
Bernard BOUFFINIER

Arthonia anglica Coppins

Arthonia anglica Dineault 2
Bernard BOUFFINIER

Arthonia anglica Coppins

Arthonia anglica Dineault 3
Bernard BOUFFINIER

Arthonia anglica Coppins

Arthonia anglica Dineault 4
Bernard BOUFFINIER

Arthonia anglica Coppins

Arthonia anglica Dineault 5
Bernard BOUFFINIER

Arthonia anglica Coppins

Arthonia anglica sur Acer Crozon 2
Bernard BOUFFINIER

Arthonia anglica Coppins

Arthonia anglica sur Acer Crozon 1
Bernard BOUFFINIER

Arthonia anglica Coppins

Arthonia anglica sur Acer Crozon 3
Bernard BOUFFINIER

Arthonia anglica Coppins

Arthonia anglica sur Acer Crozon 4
Bernard BOUFFINIER

Arthonia anglica Coppins

Arthonia anglica sur Acer Crozon 5
Bernard BOUFFINIER

Arthonia anglica Coppins

Arthonia anglica sur Acer Crozon 6
Bernard BOUFFINIER

Arthonia anglica Coppins

Arthonia anglica Coupe apothécie KOH Crozon 7
Jacques HAINE

Arthonia anglica Coppins

Arthonia anglica Coupe apothécie KC Crozon 8
Jacques HAINE

Arthonia anglica Coppins

Arthonia anglica Asque KOH Crozon 9
Jacques HAINE

Arthonia anglica Coppins

Arthonia anglica Asque Bleu Coton Crozon 10
Jacques HAINE

Arthonia anglica Coppins

Arthonia anglica Asque Lugol Crozon 11
Jacques HAINE

Arthonia anglica Coppins

Arthonia anglica Spores jeunes KOH Crozon 12
Jacques HAINE

Arthonia anglica Coppins

Arthonia anglica Spores âgées KOH Crozon 13
Jacques HAINE

Arthonia anglica Coppins

Arthonia anglica Spores Bleu Coton Crozon 14
Jacques HAINE

Arthonia anglica Coppins

Arthonia anglica Spores Lugol Crozon 15
Jacques HAINE



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