Polyblastia cupularis A. Massal. f. microcarpa Arnold

Verh. zool.-bot. Ges. Wien, 29: 378, 1879.
Synonyms: Polyblastia microcarpa (Arnold) Lettau
Distribution: N - Ven (Dalla Torre & Sarnthein 1909), TAA (Dalla Torre & Sarnthein 1909, Nascimbene & al. 2022), Lomb (Herb. Nascimbene 1274).
Description: Thallus crustose, endosubstratic, whitish to pale grey or pale grey brown, continuous, often poorly evident, sometimes delimited by a black prothalline line. Perithecia black, numerous, often arranged in rows, half immersed, forming moderately prominent projections 0.2-0.5 mm across, flask-shaped with a flattened apex, not covered by thallus. Involucrellum present, dimidiate, well-developed, clasping exciple and slightly spreading in lower part; hamathecium of periphyses and periphysoids, interascal filaments absent. Asci 8-spored, clavate, K/I-, fissitunicate, the wall thickened above, with an ocular chamber, dehiscent by extrusion of an endotunica to form a delicate rostrum. Ascospores muriform, with 6-7 oblique transverse septa and 2-3 longitudinal septa, hyaline to finally pale yellow, ellipsoid to broadly ellipsoid, (22-)26-36(-50) x (14-)20-25(-30) μm. Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.
Note: on base-rich or calcareous rocks in sheltered situations near or above treeline; a poorly known taxon, differing only in the smaller perithecia, usually accepted at varietal level (e.g. by Roux & coll. 2014), albeit with an illegitimate name.
Growth form: Crustose endolithic
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Poorly known taxon in need of further study

Commonnes-rarity: (info)

Alpine belt: very rare
Subalpine belt: very rare
Oromediterranean belt: absent
Montane belt: absent
Submediterranean belt: absent
Padanian area: absent
Humid submediterranean belt: absent
Humid mediterranean belt: absent
Dry mediterranean belt: absent

pH of the substrata:

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Solar irradiation:

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Aridity:

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Eutrophication:

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Poleotolerance:

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Altitudinal distribution:

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Predictive model
Herbarium samples

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_3/Polyblastia_cupularis_micr.htm
France, session AFL 2015 dans le Lot


S. Poumarat - Source: http://mycologie.catalogne.free.fr/lichens.htm


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_3/Polyblastia_cupularis_micr.htm
France, session AFL 2015 dans le Lot


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_3/Polyblastia_cupularis_micr.htm
France, session AFL 2015 dans le Lot