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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 are generally numerous and rarely absent, often with a mixture of apothecia of different development, the most developed being grouped together towards the center where they can reach 0.3-0.8 mm in diameter, disc a little convex, Golden yellow darker or more brownish than the thallus, paler margin disappearing with age. Polarilocular spores, broadly elliptical, lemon-shaped or rhomboidal with a septum of 4-5 µm (1/3 to 1/2 of the total length of the spore), 11-14 x 8-11 µm according to the literature; 11-15 x 8-11 µm according to our measurements. Photobiont: trebouxioid. Branched or forked paraphyses with swollen ends. 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
Bernard BOUFFINIER



Caloplaca thallincola et Caloplaca marina Pointe de Dinan
Alain GERAULT



Caloplaca thallincola Le Passage
Alain GERAULT



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
Joël QUERELLOU



Caloplaca thallincola Abbaye de Beauport 1
Bernard BOUFFINIER



Caloplaca thallincola Abbaye de Beauport 2
Bernard BOUFFINIER



Caloplaca thallincola sur Hydropunctaria maura et avec Caloplaca microthallina Roscanvel 1
Bernard BOUFFINIER



Caloplaca thallincola sur Hydropunctaria maura et avec Caloplaca microthallina Roscanvel 2
Bernard BOUFFINIER



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