Kuettlingeria percrocata (Arnold) I.V. Frolov, Vondrák & Arup

in Frolov & al., J. Syst. Evol. 59, 3: 468, 2020. Basionym: Blastenia percrocata Arnold - Flora, 67: 309, 1884.
Synonyms: Callopisma percrocatum (Arnold) Jatta; Caloplaca percrocata (Arnold) J. Steiner
Distribution: N - Ven (Frolov & al. 2020), TAA (Vondrák 2008, Vondrák & al. 2008), Piem (TSB 34342). Lig. C - Tosc, Sar.
Description: Thallus crustose, episubstratic, areolate, whitish grey to dark grey, often with a bluish or brownish tinge, well-delimited, sometimes with a thin, dark grey prothallus. Areoles irregular, uneven, flat to convex, up to 3 mm in diam. Apothecia often in groups, 0.4-1.5 mm across, angular to flexuose, sessile from the beginning, with a flat, brownish orange to brownish red disc contrasting with a paler, yellowish orange, thick proper margin; thalline margin pale yellow, soon excluded and finally poorly visible. Thalline exciple ecorticate in lower part, or with an indistinct, up to 20 µm thick cortex; proper exciple of radiating hyphae; epithecium orange-brown K+ red, C+ purple in section; hymenium colourless; paraphyses sparingly branched in upper part; hypothecium colourless, with oil droplets. Asci 8-spored, clavate, Teloschistes-type. Ascospores 1-septate, polarilocular, hyaline, ellipsoid, 14-18(-20) x 6-10(-12) µm, the septum 3-6 µm thick (c. 1/3 of spore length). Pycnidia grey in upper part. Conidia ellipsoid, 2.5-4 x 1.1.5 µm. Photobiont chlorococcoid. Spot tests: thallus K- or K+ violet, C- or C+ violet, KC-, P-; apothecia K+ red, C+ purple in section. Chemistry: thallus with the Sedifolia-grey pigment and chloroemodin; apothecia with chlorinated anthraquinones.
Note: on base-rich and lime-containing siliceous rocks above treeline. The identity of Mediterranean samples (e.g. those from Sardegna) is dubious, and all records from southern Italy reported by Nimis (1993: 180) are not accepted here.
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: very rare
Subalpine belt: extremely rare
Oromediterranean belt: extremely rare
Montane belt: absent
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

ùJan Vondrak https://botanika.prf.jcu.cz/lichenology/i


ùJan Vondrak - source: https://botanika.prf.jcu.cz/lichenology/i



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (34342)
2002/01/07
identification not certain


ùJan Vondrak - source: https://botanika.prf.jcu.cz/lichenology/i