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Caloplaca thallincola (Wedd.) Du Rietz

Synonyms:

Family: TELOSCHISTACEAE

Habitat: Mesic supralittoral zone

Description

    Thallus placodioid, forming in favourable conditions closely appressed, very regular, round cartwheels, 1-5 cm diam., with long and wide contiguous lobes, smooth and more or less pleated, with parallel furrows; margin made of slightly divided and palmate end-lobes. Colour, variable according to exposition, most often a magnificent bright golden-yellow to bright yellow-orange. Apothecia seldom absent and usually numerous, mostly confined to the central area, to 0.3-0.8 mm diam., discs golden-yellow darker or more brown than thallus, at first flat but becoming convex, thalline margin paler, excluded when old. Ascospores polarilocular, lemon-shaped, septum 4-5 µm wide, 11-14 x 8-11 µm. Photobiont : trebouxioide. Thallus and apothecia K + purple.  Common on not too exposed siliceous rocks where this species is often overgrowing marine  Verrucaria and notably Verrucaria (Hydropunctaria) maura  of which it could be a parasite.  N.B. In the halophilic zone Caloplaca scopularis  notably more rare, is very similar but with less bright colours.*







Caloplaca thallincola Landévennec 3
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Caloplaca thallincola et Caloplaca marina Pointe de Dinan
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Caloplaca thallincola Le Passage
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Caloplaca thallincola Crozon
Bernard BOUFFINIER



Caloplaca thallincola Landévennec 2
Bernard BOUFFINIER



Caloplaca thallincola Fort Armorique
Michel DAVID



Caloplaca thallincola Landévennec 1
Bernard BOUFFINIER



Caloplaca thallincola Roscanvel 1
Bernard BOUFFINIER



Caloplaca thallincola Le Passage 2
Bernard BOUFFINIER



Caloplaca thallincola Roscanvel 2
Bernard BOUFFINIER



Caloplaca thallincola Tromel
Bernard BOUFFINIER



Caloplaca thallincola Asques eau Roscanvel 4
Jacques HAINE



Caloplaca thallincola Coupe apothécie eau Roscanvel 3
Jacques HAINE



Caloplaca thallincola Asques Lugol Roscanvel 5
Jacques HAINE



Caloplaca thallincola Paraphyses K Roscanvel 6
Jacques HAINE



Caloplaca thallincola Spores K Roscanvel 7
Jacques HAINE



Caloplaca thallincola Spores Lugol Roscanvel 8
Jacques HAINE



Caloplaca thallincola et Hydropunctaria maura Kermorvan 1
Jo√ęl QUERELLOU



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