Hymenelia ceracea (Arnold) M. Choisy

Bull. mens. Soc. linn. Soc. Bot. Lyon, 18: 145, 1949. Basionym: Aspicilia ceracea Arnold - Flora, 42: 149, 1859.
Synonyms: Ionaspis ceracea (Arnold) Hafellner & Türk; Lecanora ceracea (Arnold) Stizenb.
Distribution: N - TAA (Nascimbene & al. 2022), Lomb (Kantvilas 2014), Piem (Isocrono & al. 2003, 2004).
Description: Thallus crustose, mostly episubstratic, very thin, continuous to rimose-areolate, smooth, ochre-orange, to pale brown, sometimes poorly evident, forming up to 8(-10) cm wide patches. Apothecia 0.2-0.5 mm across, at first immersed, later slightly prominent, with a concave to flat, ochre-orange to brown-orange disc, and a rather thick and prominent, finally often excluded margin. Epithecium pale reddish brown, N-, K-; hymenium colourless, 70-130 µm high; paraphyses mostly simple, submoniliform in upper part, the apical cells not swollen; hypothecium colourless. Asci 8-spored, cylindrical-clavate, the outer wall K/I+ blue, but the inner walls and apical dome K/I-. Ascospores 1-celled, broadly ellipsoid, 10-16 x 6-9 µm. Pycnidia reddish. Conidia short-bacilliform. Photobiont chlorococcoid (Asterochloris), the cells <15 µm wide. Spot tests: thallus K- C-, KC-, P-, UV-. Chemistry: without lichen substances.
Note: on siliceous rocks, including pebbles and stones near the soil, usually in upland areas; overlooked, or confused with superficially similar, small Acarospora-species, to be looked for in the mountains of Southern Italy. Perhaps this is a synonym of H. lacustris. The record from Venezia Giulia in Nimis (1993: 317) has been excluded, as the locality is outside Italy.
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Pioneer species

Commonnes-rarity: (info)

Alpine belt: rather rare
Subalpine belt: rare
Oromediterranean belt: absent
Montane belt: very rare
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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(info)

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


Pier Luigi Nimis - CC BY-SA 4.0
TSB 27792



Pier Luigi Nimis - CC BY-SA 4.0
TSB 27792



Pier Luigi Nimis - CC BY-SA 4.0
TSB 27792



Pier Luigi Nimis - CC BY-SA 4.0
TSB 27792



Pier Luigi Nimis - CC BY-SA 4.0
TSB 27792



Pier Luigi Nimis - CC BY-SA 4.0
TSB 27792



Pier Luigi Nimis - CC BY-SA 4.0
TSB 27792



Pier Luigi Nimis - CC BY-SA 4.0
TSB 27792



E. Pittao CC BY-SA 4.0
TSB 27792


Marta Gonzalez Garcia
Spain, Asturias, Quirós, Sierra del Aramo, 700 m on siliceous rocks
25.05.2022


Marta Gonzalez Garcia
Spain, Asturias, Quirós, Sierra del Aramo, 700 m on siliceous rocks
25.05.2022


Marta Gonzalez Garcia
Spain, Asturias, Quirós, Sierra del Aramo, 700 m on siliceous rocks
25.05.2022


Marta Gonzalez Garcia
Spain, Asturias, Quirós, Sierra del Aramo, 700 m on siliceous rocks
25.05.2022


Marta Gonzalez Garcia
Spain, Asturias, Quirós, Sierra del Aramo, 700 m on siliceous rocks
25.05.2022


Michel David - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=142&lang=en
France, Roscanvel Fraternitè


Michel David - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=142&lang=en
France, Roscanvel Fraternitè


Michel David - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=142&lang=en
France, Roscanvel Fraternitè


Michel David - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=142&lang=en
France, Roscanvel Fraternitè


Alain Gerault - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=142&lang=en
France, Roscanvel Fraternitè


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=142&lang=en
France, Roscanvel Fraternitè


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=142&lang=en
France, Roscanvel Fraternitè


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=142&lang=en
France, Roscanvel Fraternitè


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=142&lang=en
France, Roscanvel Fraternitè


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=142&lang=en
France, Roscanvel Fraternitè
photobiont