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Coniocarpon fallax (Ach.) Grube = Arthonia elegans (Ach.) Almq.

Coniocarpon fallax (Ach.) Grube    = Arthonia elegans (Ach.) Almq.

Synonyms:

Arthonia ochracea  Dufour

Coniocarpon elegans (Ach.) Duby

Arthonia elegans (Ach.) Almq.



Family: ARTHONIACEAE

Habitat: Oceanic zone

Description

    Thallus thin, most often immersed in the bark, sometimes more or less evanescent, 3-5 cm across, cream orange, yellowish, brown-orange, pale redddish, prothallus paler or with a brownish edging. Apothecia usually very numerous, narrow with pointed apices, most often wavy and linear though occasionally branched or stellate, 0.5-1.5 x 0.1-0.2 mm, brown purple, brown-blackish, blackish, very often surrounded by a bright red pruine, that if well developed may give a red aspect to the thallus. Ascospores colourless when young, brown-black when mature, clavate, with a larger cell at one apex, 12-18 (20) x 4-7 µm. Photobionte : Trentepohlia. Rare (except in some limited sites), on young trees with smooth bark ((Fraxinus, Corylus) in woodlands and oceanic forests.

N.B. Very easily confused with Coniocarpon (Arthonia) cinnabarina (notably for old or very red specimen) much more common, and potentially growing on the same substratum, but the latter has less numerous and much larger apothecia, not linear nor stellate and characterized by a polygonal structure of which the center is white due to pruine; in case of uncertainty, a microscope analysis may show longer, narrower ascopores, 3-5-septate.





Coniocarpon fallax (Ach.) Grube = Arthonia elegans (Ach.) Almq.

Arthonia elegans Crozon 1
Alain GERAULT

Coniocarpon fallax (Ach.) Grube = Arthonia elegans (Ach.) Almq.

Arthonia elegans Crozon 2
Alain GERAULT

Coniocarpon fallax (Ach.) Grube = Arthonia elegans (Ach.) Almq.

Arthonia elegans Crozon 3
Alain GERAULT

Coniocarpon fallax (Ach.) Grube = Arthonia elegans (Ach.) Almq.

Arthonia elegans Crozon 4
Bernard BOUFFINIER

Coniocarpon fallax (Ach.) Grube = Arthonia elegans (Ach.) Almq.

Arthonia elegans Crozon 5
Bernard BOUFFINIER

Coniocarpon fallax (Ach.) Grube = Arthonia elegans (Ach.) Almq.

Arthonia elegans Crozon 6
Bernard BOUFFINIER

Coniocarpon fallax (Ach.) Grube = Arthonia elegans (Ach.) Almq.

Arthonia elegans Ardennes 1
Jacques HAINE

Coniocarpon fallax (Ach.) Grube = Arthonia elegans (Ach.) Almq.

Arthonia elegans Asques Ardennes 2
Jacques HAINE

Coniocarpon fallax (Ach.) Grube = Arthonia elegans (Ach.) Almq.

Arthonia elegans Spores Ardennes 3
Jacques HAINE

Coniocarpon fallax (Ach.) Grube = Arthonia elegans (Ach.) Almq.

Arthonia elegans (gauche) et Arthonia cinnabarina (âgé droite)
Jacques HAINE

Coniocarpon fallax (Ach.) Grube = Arthonia elegans (Ach.) Almq.

Arthonia elegans Crozon 7
Michel DAVID

Coniocarpon fallax (Ach.) Grube = Arthonia elegans (Ach.) Almq.

Arthonia elegans Crozon 8
Michel DAVID



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