Anisomeridium robustum Orange, Coppins & Aptroot

Lichenologist, 40: 363, 2008
Synonyms:
Distribution:
Description: Thallus crustose, thinly episubstratic, white or pale grey, continuous or cracked, ecorticate. Perithecia extremely rare, black, 280-350 µm across, subglobose, the ostiole not very conspicuous, black and carbonaceous. Exciple of cellular hyphae; pseudoparaphyses c. 1.5 µm thick, sparingly branched and anastomosing; periphyses absent; hymenial gel I-. Asci 8-spored, cylindrical, K/I-, fissitunicate, the apical dome with a conspicuous ocular chamber and uniseriately arranged spores. Ascospores 1-septate, hyaline, ellipsoid to pyriform, 12.5-13 x 6.5-7.5 µm, slightly constricted at septum, hyaline, without an epispore or gelatinous sheath. Pycnidia black, 0.2-0.6 mm across, 0.2-0.5 mm high, conical, with a globose base tapering into a narrow, long neck. Conidia simple, hyaline, pyriform-ellipsoid, with a truncate base, 5.5-6.5 x 2.5-3 µm, sometimes extruded as a long, white cirrus. Photobiont trentepohlioid. Spot tests: thallus K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.
Note: a recently-described species, recently found also in the fertile state (see Cannon & al. 2023) but usually sterile, with macropycnidia and conidia similar to those of A. polypori, but much larger. So far recorded only from a few sites rich in old-forest lichens in the United Kingdom, but perhaps more widespread. To be looked for in the most humid parts of Tyrrhenian Italy.
Growth form: Crustose
Substrata: bark
Photobiont: Trentepohlia
Reproductive strategy: mainly asexual, by conidia and thalloconidia
Most common in areas with a humid-warm climate (e.g. most of Tyrrenian Italy)

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Predictive model
Index Fungorum GBIF

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1347&lang=en
France, Crozon


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1347&lang=en
France, Roscanvel


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1347&lang=en
France, Roscanvel


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1347&lang=en
France, Roscanvel


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1347&lang=en
France, Roscanvel


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1347&lang=en
France, Roscanvel


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1347&lang=en
France, Roscanvel


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1347&lang=en
France, Roscanvel


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1347&lang=en
France, Roscanvel


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1347&lang=en
France, Roscanvel


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1347&lang=en
France, Roscanvel


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1347&lang=en
France, Crozon


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1347&lang=en
France, Crozon


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1347&lang=en
France, Crozon