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Anisomeridium polypori  (Ellis & Everh.) M. E. Barr

Synonyms:

Family: MONOBLASTIACEAE

Habitat: Ubiquitous

Description

   Thallus often inconspicuous, effuse, visible as a thin dirty whitish coat, grey or pale grey-green, leaving occasionally the substratum colour visible. Perithecia rarely numerous, black, scattered, 0.15-0.25 mm diam.. Pycnidia numerous, black, 0,1-0,2 mm of two types: 1) conical, 2) conical and ended by peg-like tips or upside-down funnel-shaped appendix, with ellipsoid or ovoid macroconidia, extruded as a white tendril in which the conidia are bound by a gelatinous matrix, ovoid macroconidia: 3.5-4.5 x 1.8-3 µm according to the literature, 2-4 (5) x 2-3 according to our measurements; ellipsoid microconidia: 2-3 x 1-1.3 µm according to the literature. Spores colorless, elliptical, 1-3 septate, 15-20 x 4-5 µm according to the literature; 1-3 (4) septate with a perispore, 12-17 x 3.5-4.5 µm according to our measurements. Photobiont : Trentepohlia.  Chemical spot tests negative. Very small species, understated unless specifically targeted, on rough bark of broad-leaved trees, in humid shaded woodland, seldom on rocks. Easy to determine (magnifying glass) by the observation of some pycnidia apex bearing a long thin appendix.

NB It has been described from the British Isles and which would exist in Brittany (on quantitative characters) a very similar species: Anisomeridium robustum Orange, Coppins & Aptroot, devoid of perithecia but with a thicker thallus, often provided with a blackish hypothalle, larger macropycnidia and also larger conidia: 5.5-6.5 x 2.5-3 µm but which seems to be linked to Anisomeridium polypori by intermediates.







Anisomeridium polypori Ardennes
Jacques HAINE



Anisomeridium polypori Landévennec 1
Bernard BOUFFINIER



Anisomeridium polypori Landévennec 2
Bernard BOUFFINIER



Anisomeridium polypori Landévennec 3
Bernard BOUFFINIER



Anisomeridium polypori Landévennec 4
Bernard BOUFFINIER



Anisomeridium polypori Lesteven 1
Bernard BOUFFINIER



Anisomeridium polypori Lesteven 2
Bernard BOUFFINIER



Anisomeridium polypori Lugol Belgique 1
Jacques HAINE



Anisomeridium polypori Asques Lugol Belgique S2
Jacques HAINE



Anisomeridium polypori Asque Lugol Belgique S3
Jacques HAINE



Anisomeridium polypori Spores Lugol Belgique S4
Jacques HAINE



Anisomeridium polypori Général Bleu Coton Belgique S5
Jacques HAINE



Anisomeridium polypori Asques KOH Belgique S6
Jacques HAINE



Anisomeridium polypori Asque Bleu Coton Belgique S7
Jacques HAINE



Anisomeridium polypori Spores Rouge Congo Belgique S8
Jacques HAINE



Anisomeridium polypori Asques et spores Rouge Congo Belgique S9
Jacques HAINE



Anisomeridium polypori Coupe périthéce (à droite) et pycnide (à gauche) Belgique S10
Jacques HAINE



Anisomeridium polypori Coupe KOH périthéce (à droite) et pycnide à gauche Belgique S11
Jacques HAINE



Anisomeridium polypori Coupe périthéce KOH Belgique S12
Jacques HAINE



Anisomeridium polypori Coupe KOH pycnide Belgique S13
Jacques HAINE



Anisomeridium polypori Macroconidies KOH Belgique S14
Jacques HAINE



Anisomeridium polypori Lesteven 3
Bernard BOUFFINIER



Anisomeridium polypori Lesteven 4
Bernard BOUFFINIER



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