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Blastenia crenularia (With.) Arup, Søchting & Fröden = Caloplaca crenularia (With.) J. R. Loudon

Blastenia crenularia (With.) Arup, Søchting & Fröden

= Caloplaca crenularia (With.) J. R. Loudon

Synonyms:

Family: TELOSCHISTACEAE

Habitat: Aerohaline zone

Description

    Thallus crustose, rough, rather thick, cracked-areolate, up to 10 cm max. length, whitish to pale gray but often appearing dark gray or slate by its prothallus. Apothecia very numerous, up to 1 mm diam., rounded but occasionally slightly flexuose, disc flat then convex to (seldom) bulging, bright rusty, reddish, dark brown-red, almost blackish, seldom red-orange, sometimes with green or black spots, but these spots never cover entirely the disc especially when wet, proper exciple thin, typically, minutely and transversally pleated or crenulate, often winding, smooth and glossy when young, then insconspicous and concolourous to disc. Ascospores ellipsoid, polarilocular, septum 5 µm wide, to 1/2 of the length of the ascospore, the two poles linked by a thin conspicuous isthmus-like junction, 12-14 x 6-8 µm according to literature, 12-17 x 7-10 according to our measures. Thallus K- ; apothecia K+ purple, apothecium rim C+ red. Photobiont: Trebouxia. Not rare on dry and well lit siliceous or weakly alkaline rocks on the seashore, but occasionally also inland, on old walls. 

    This species is considered here sensu lato since it appears highly variable and many taxa coexist. In harsh conditions, specimen are limited to a thallus covered by minute brown-red granules or distorted apothecia (see Caloplaca crenularia forma and Caloplaca crenularia var. contigua). In case of dry weather, this species is hardly distinguishable from Caloplaca ceracea which can be found close (see picture), but  usually prefers less sunny and more moist conditions, but apothecia discs of the latter are more dull yellow-orange and some of them possibly entirely green if not too dry, with margins paler and not concolourous and discs not bulged. However, many intermediate specimen exist and some are rather difficult to determine without microscopic observations.

N.B. Closely related to the bark-inhabiting Caloplaca ferruginea, as if it was its double.

_ See also Caloplaca arenaria of which the apothecia are smaller, less red and more orange, the thallus is thin and hardly visible and ascospores have a narrower equatorial thickness (septum) and Kuettlingeria (Caloplaca) fuscoatroides with a thick, dark gray to blackish thallus with more orange apothecia and whose apothecia (disc and rim) are C+ red and large black protruding pycnidia which is strictly limited to rocks and large siliceous stones of the xeric supralittoral zone.

 




Blastenia crenularia (With.) Arup, Søchting & Fröden
= Caloplaca crenularia (With.) J. R. Loudon

Caloplaca crenularia Beg ar Meinou 2
Jo毛l QUERELLOU

Blastenia crenularia (With.) Arup, Søchting & Fröden
= Caloplaca crenularia (With.) J. R. Loudon

Caloplaca crenularia Sur une surface horizontale H么pital-Camfrout 2
Bernard BOUFFINIER

Blastenia crenularia (With.) Arup, Søchting & Fröden
= Caloplaca crenularia (With.) J. R. Loudon

Caloplaca crenularia Crozon 1
Bernard BOUFFINIER

Blastenia crenularia (With.) Arup, Søchting & Fröden
= Caloplaca crenularia (With.) J. R. Loudon

Caloplaca crenularia Camaret
Bernard BOUFFINIER

Blastenia crenularia (With.) Arup, Søchting & Fröden
= Caloplaca crenularia (With.) J. R. Loudon

Caloplaca crenularia Plougastel-Daoulas 1
Bernard BOUFFINIER

Blastenia crenularia (With.) Arup, Søchting & Fröden
= Caloplaca crenularia (With.) J. R. Loudon

Caloplaca crenularia Beg ar Meinou 1
Jo毛l QUERELLOU

Blastenia crenularia (With.) Arup, Søchting & Fröden
= Caloplaca crenularia (With.) J. R. Loudon

Caloplaca crenularia Le Conquet
Alain GERAULT

Blastenia crenularia (With.) Arup, Søchting & Fröden
= Caloplaca crenularia (With.) J. R. Loudon

Caloplaca crenularia Beg ar Meinou 3
Jo毛l QUERELLOU

Blastenia crenularia (With.) Arup, Søchting & Fröden
= Caloplaca crenularia (With.) J. R. Loudon

Caloplaca crenularia Asque H么pital-Camfrout 3
Jacques HAINE

Blastenia crenularia (With.) Arup, Søchting & Fröden
= Caloplaca crenularia (With.) J. R. Loudon

Caloplaca crenularia Apoth茅cie H么pital-Camfrout 4
Jacques HAINE

Blastenia crenularia (With.) Arup, Søchting & Fröden
= Caloplaca crenularia (With.) J. R. Loudon

Caloplaca crenularia Spores H么pital-Camfrout 5
Jacques HAINE

Blastenia crenularia (With.) Arup, Søchting & Fröden
= Caloplaca crenularia (With.) J. R. Loudon

Caloplaca crenularia Humide H么pital-Camfrout 1
Jacques HAINE

Blastenia crenularia (With.) Arup, Søchting & Fröden
= Caloplaca crenularia (With.) J. R. Loudon

Caloplaca crenularia Plomodiern 1
Bernard BOUFFINIER

Blastenia crenularia (With.) Arup, Søchting & Fröden
= Caloplaca crenularia (With.) J. R. Loudon

Caloplaca crenularia Plomodiern 2
Jacques HAINE

Blastenia crenularia (With.) Arup, Søchting & Fröden
= Caloplaca crenularia (With.) J. R. Loudon

Caloplaca crenularia Asques et paraphyses Bleu Coton Plomodiern 3
Jacques HAINE

Blastenia crenularia (With.) Arup, Søchting & Fröden
= Caloplaca crenularia (With.) J. R. Loudon

Caloplaca crenularia Spores et photobionte eau Plomodiern 4
Jacques HAINE

Blastenia crenularia (With.) Arup, Søchting & Fröden
= Caloplaca crenularia (With.) J. R. Loudon

Caloplaca crenularia Ile Tudy 1
Bernard BOUFFINIER

Blastenia crenularia (With.) Arup, Søchting & Fröden
= Caloplaca crenularia (With.) J. R. Loudon

Caloplaca crenularia Ile Tudy 2
Bernard BOUFFINIER

Blastenia crenularia (With.) Arup, Søchting & Fröden
= Caloplaca crenularia (With.) J. R. Loudon

Caloplaca crenularia Ile Tudy 3
Bernard BOUFFINIER



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