ITALIC 7.0

Absconditella delutula (Nyl.) Coppins & H. Kilias

in Hawksworth & al., Lichenologist, 12: 106, 1980.. Basionym: Lecidea delutula Nyl. - Grevillea, 8): 30, 1879.

Synonyms: Absconditella modesta (Hegetschw.) Vězda; Gyalecta modesta (Hegetschw.) Zahlbr.; Lecidea modesta Hegetschw.; Secoliga modesta (Hegetschw.) Arnold

Distribution:

Description: Thallus crustose, episubstratic, 10-100 µm thick, continuous or irregularly rimose-interrupted, grey green to dark olive green. Apothecia abundant immersed in the thallus or slightly projecting, round, 0.07-0.15 mm across, with a concave, pale waxy yellow disc, and a smooth, concolorous or yellow-brown proper margin. Proper exciple colourless or pale olive-yellow, 20-40 µm thick laterally, 15-20 µm thick in lower part; epithecium indistinct, colourless; hymenium colourless, 60-80 µm high, I+ yellowish, K/I-; paraphyses dense, slender, 1-1.5 µm thick, indistinctly septate, simple or forked in upper part, the apical cells slightly clavate; hypothecium very thin, colourless. Asci 8-spored, long-cylindrical, thin-walled, the upper part with a distinct, K/I- apical dome penetrated by a long, narrow tube extending from the endoascus, with 1-seriately arranged spores. Ascospores 1-septate, hyaline, spindle-shaped, straight, 8-13(-15) x 3-5 μm, with very thin walls and septa. Photobiont chlorococcoid, the cells 5-15(-30) µm across. Spot tests: thallus K-, C-, KC-, P-. Chemistry: without lichen substances.

Note: a coloniser of small siliceous stones and pebbles in moist and shaded situations; so far reported from a few scattered localities in the Alps (outside the Italian territory), but perhaps more widespread. To be looked for in Italy.

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

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