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Arthopyrenia analepta (Ach.) A. Massal.

Synonyms:

Family: ARTHOPYRENIACEAE

Habitat: Ubiquitous

Description

    Thallus hardly visible or glossy resulting bark, this species probably being not lichenized. Perithecia black, rounded to oval-shaped with a base circled by a blackish belt, 0.3-0.6 mm max. length. Asci cylindrical. Ascospores colourless (but sometimes dark at the end of observation), surrounded by a hyaline perispore, clavate, 1-septate, markedly constricted at septum level, with 1 or 2 vacuoles in each segment, 15-23 x 5,5-8 µm. Chemical spot tests negative. Common and widespread on smooth bark of deciduous trees. N.B. Species close to Arthopyrenia fraxini of which perithecia are smaller, ascospores less enlarged with a less important constriction and issued from pyriform asci. When growing on Betula bark, can easily be confused with  Leptorhaphis epidermitis of which ascospores are different (boomerang-shaped). N.B. There are a great number of similar species rather difficult to identify, even with careful microscopic observations.*







Arthopyrenia analepta Daoulas 5
Joël QUERELLOU



Arthopyrenia analepta Daoulas 4
Joël QUERELLOU



Arthopyrenia analepta Daoulas 3
Joël QUERELLOU



Arthopyrenia analepta Daoulas 2
Joël QUERELLOU



Arthopyrenia analepta Daoulas 1
Joël QUERELLOU



Arthopyrenia analepta Daoulas 6
Alain GERAULT



Arthopyrenia analepta Daoulas 7
Joël QUERELLOU



Arthopyrenia analepta Sur Crataegus Ardennes 1
Jacques HAINE



Arthopyrenia analepta Sur Crataegus Ardennes 2
Jacques HAINE



Arthopyrenia analepta Asque et spores Ardennes 3
Jacques HAINE



Arthopyrenia analepta Spores Ardennes 4
Jacques HAINE



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