Agonimia opuntiella (Buschardt & Poelt) Vězda

Sched. ad Lich. Rar. Exs., 330: 4, 1997. Basionym: Physcia opuntiella Buschardt & Poelt in Poelt - Flora, 169: 24, 1980.
Synonyms: Phaeophyscia opuntiella (Buschardt & Poelt) Hafellner
Distribution: N - VG, Frl, Ven (Nascimbene & al. 2021), TAA (Nascimbene & al. 2007b, 2014, Nascimbene 2014), Lomb (Hafellner 2014b), Emil (Nimis & al. 1996, Fariselli & al. 2020). C - Tosc (Brackel 2015), Umb (Genovesi & al. 2002, Ravera & al. 2006), Laz (Ravera 2001, Munzi & al. 2007, Ravera & Genovesi 2008), Mol (Caporale & al. 2018). S - Camp (Ravera & al. 2017b).
Description: Thallus squamulose, grey to brownish- or greenish-grey, loosely attached. Squamules 0.1-0.4 mm broad, bullate to slightly flattened, entire to crenate, dispersed or grouped, often articulate in the form of a Opuntia, densely covered by thin transparent hairs, sometimes blastidiate. Thallus paraplectenchymatous throughout, without a distinct cortex. Perithecia very rare, black, pyriform, without involucrellum, located among the squamules, 0.3-0.4 mm across (in section), with a rugose surface. Exciple distinctly 3-layered, with an outer layer of rounded, heavily pigmented cells, a median layer of similar, but unpigmented cells, and an inner layer of elongated, colourless cells; hamathecium of periphyses and periphysoids, interascal filaments absent; hymenial gel hemiamyloid. Asci 2-spored, clavate, thin-walled, fissitunicate, not or very weakly thickened above, I-, K/I-. Ascospores muriform, at first hyaline, then turning pale brown, ellipsoid, 60-70 x 25-28 μm. Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.
Note: a mild-temperate species found on terricolous mosses and plant debris over calcareous substrata, sometimes amongst mosses on basal parts of old trees, from the Mediterranean to the montane belt.
Growth form: Squamulose
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: absent
Subalpine belt: absent
Oromediterranean belt: absent
Montane belt: extremely rare
Submediterranean belt: very rare
Padanian area: absent
Humid submediterranean belt: rare
Humid mediterranean belt: extremely rare
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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P.L. Nimis CC BY-SA 04
TSB 33902



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (33902)
2001/12/07



Pier Luigi Nimis CC BY-SA 4.0
TSB 42496



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (33902)
2001/12/07



P.L. Nimis CC BY-SA 04
TSB 42496



P.L. Nimis CC BY-SA 04
TSB 42496



P.L. Nimis CC BY-SA 4.0
TSB 33902