ITALIC 8.0

Acarospora nitrophila H. Magn.

Göteborg. Vetensk.-och Vitter.-Handl., Ser. 4, 28, 2: 74, 1924.

Synonyms: Acarospora moraviae H. Magn.

Distribution: N - TAA (Nascimbene 2004, Knudsen & al. 2026), Lomb, Piem (Morisi & Sereno 1995, Matteucci & al. 2013, Giordani & al. 2014), VA (Piervittori & Isocrono 1999, Isocrono & al. 2008, Favero-Longo & Piervittori 2009, Matteucci & al. 2015c), Lig. C - Tosc, S - , Si (Grillo & Caniglia 2004).

Description: Thallus crustose, episubstratic, of dispersed or contiguous, sometimes substipitate 0.3-0.5(-1.4) mm wide and 0.3-0.6 mm thick, flat to slightly convex, sometimes lobulate areoles, the upper surface dark brown, red brown or pale brown, epruinose or rarely partially pruinose, sometimes minutely rugulose when wetted; lower surface partly white in young areoles, but usually pale brown to blackish brown. Epicortex lacking or <10 μm thick and giving areoles a shiny appearance; cortex 20-30(-40) μm thick, the upper layer dark brown and narrow, often one cell thick, the lower layer colourless, with round or variably shaped, mostly 3-6 μm wide, sometimes vertically arranged cells; algal layer 80-120 μm thick, not dense, relatively even, uninterrupted by hyphal bundles but with occasionally narrow strands of hyphae visible between the algal cells; medulla usually up to 400 μm thick, of thin-walled, branched, densely intricate to vertically arranged, 2-4(-5) μm thick hyphae with some round to irregular bloated and angular cells. Apothecia 1-10 per areole, 0.1-0.4(-0.5) mm across, immersed or semi-immersed, with a dull brown, usually epruinose disc, with or without an elevated thalline margin. Proper exciple to 15-30 μm wide, sometimes visible as a narrow parathecial ring; epithecium brownish, c. 10 μm high; hymenium colourless, (90-)100-130(-150) μm high, the hymenial gel hemiamyloid, I+ immediately red or blue slowly turning red; paraphyses (1-)1.5(-2) μm thick at mid-level, the apical cells barely expanded; subhymenium 20-30 μm high, I+ blue; hypothecium indistinct, to 20 μm high. Asci 100-200-spored, cylindrical to narrowly clavate, 80-120 x 10-20 μm. Ascospores 1-celled, hyaline, ellipsoid, 4-5 x (1.5-)2 μm, Pycnidia rare. Conidia simple, c. 1.5 x 0.7 μm. Photobiont chlorococcoid. Spot tests: cortex and medulla K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: a lichen of steeply inclined to rain-sheltered surfaces of basic siliceous rocks, usually in species-poor communities, mostly near settlements. This is one of the most misunderstood species of the genus in Europe (Knudsen & Kocourková 2017; Knudsen & al., in press). Earlier records by Nimis & Tretiach (1999) from Marche and Basilicata, and Nimis & al. (1996b) from Sicily are erroneous (fide Knudsen in TSB). The only confirmed record from Italy is that by Nascimbene (2004) from the Stelvio National Park (Knudsen & al., 2026), all other records require confirmation.

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: very rare

Oromediterranean belt: absent

Montane belt: very rare

Submediterranean belt: very rare

Padanian area: absent

Humid submediterranean belt: very rare

Humid mediterranean belt: absent

Dry mediterranean belt: absent

pH of the substrata:

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5

(info)

Solar irradiation:

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(info)

Aridity:

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(info)

Eutrophication:

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(info)

Poleotolerance:

0

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(info)

Altitudinal distribution:

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(info)

Predictive model

DOLICHENS

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste

Herbarium: Herb. J.Nascimbene
2003/03/31

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste

Herbarium: TSB (29921)
2003/03/11