Hymenelia melanocarpa (Kremp.) Arnold

Flora, 52: 255, 1869. Basionym: Hymenelia prevostii var. melanocarpa Kremp. - Flora, 35: 25, 1852.
Synonyms: Ionaspis cyrtaspis auct. non (Wahlenb.) Arnold; Ionaspis melanocarpa (Kremp.) Arnold; Lecanora prevostii f. melanocarpa (Kremp.) Stizenb.
Distribution: N - Frl, Ven (Nimis 1994, Nascimbene & Marini 2007, Nascimbene 2008c), TAA (Nascimbene & al. 2006), Lomb (Herb. Ravera 4970), Piem (Isocrono & al. 2004), Lig. C - Tosc (SI 207), Marc (Nimis & Tretiach 1999).
Description: Thallus crustose, endosubstratic or thinly episubstratic, continuous or very finely rimose, pinkish white to yellowish grey. Apothecia (0.2-)0.5-1 mm across, immersed in thalline warts and often separated from the thallus by a circular crack, with a black, at first pore-like and concave, then expanded and flat disc, and a more or less prominent, black proper margin. Proper exciple brown-black; epithecium greenish brown to blue-green, K-, N+ red; hymenium 180-240 µm high, blue-green in upper part, colourless in lower part, the pigmented parts K-, N+ red; paraphyses simple or sparingly branched, 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, hyaline, broadly ellipsoid, (10-)14-20(-24) x 8-13 µm. Pycnidia immersed, with a green wall reacting N+ red. Conidia bacilliform. Photobiont trentepohlioid, the cells 10-18 µm wide. Spot tests: thallus K-, C-, KC-, P- , UV-. Chemistry: without lichen substances.
Note: a mainly arctic-alpine, circumpolar species, most common on hard, compact calciferous rocks in upland areas; probably widespread throughout the Alps, very rare in the Apennines.
Growth form: Crustose
Substrata: rocks
Photobiont: Trentepohlia
Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: rather common
Subalpine belt: rather rare
Oromediterranean belt: very rare
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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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


Pier Luigi Nimis - CC BY-SA 4.0
TSB 4024



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (19713)
2001/12/18



Pier Luigi Nimis - CC BY-SA 4.0
TSB 4024



Pier Luigi Nimis - CC BY-SA 4.0
TSB 4024



P.L. Nimis CC BY-SA 4.0
TSB 19713