Calogaya rouxii (Gaya, Nav.-Ros. & Llimona)

(provisionally placed here, ICN Art. 36.1b). Basionym: Caloplaca rouxii Gaya, Nav.-Ros. & Llimona - in Gaya, Bibl. Lichenol., 101: 82, 2009.
Synonyms:
Distribution: N - Frl, Ven (Nascimbene & Caniglia 2000, 2003c, Nascimbene 2008c), TAA (Nascimbene & al. 2006, Nascimbene 2008b), Piem (Nascimbene & al. 2021). C - Abr (Nimis & Tretiach 1999, Gheza & al. 2021).
Description: Thallus crustose-placodioid, episubstratic, rather loosely attached, scarlet red or orange-red, epruinose, usually with discoloured patches resembling pseudocyphellae, forming orbicular rosettes up to 1.2 cm in diam. Marginal lobes up to 1.2 mm long, strongly convex, contiguous to overlapping; central parts of thallus of flat, angular areoles. Cortex sclero-prosoplectenchymatous, 30-80 µm thick, with hyphal cells perpendicular to the the surface, and partially reaching the algal layer. Apothecia numerous, covering the base of lobes, 0.3-1.2(-1.8) mm across, at first immersed in the thallus, then adnate to broadly sessile, round to irregular in outline by mutual compression, with a concave to slightly convex, scarlet red to red-orange, epruinose disc, a thin, paler proper margin, and a smooth to crenulate thalline margin concolorous to thallus. Epithecium 6-14 µm thick, brownish yellow, K+ red; hymenium colourless, 50-95 µm high; paraphyses richly branched, 1.5-3.5 µm thick at base, the apical cells 3-6.5 µm wide; hypothecium colourless. Asci 8-spored, cylindrical-clavate, Teloschistes-type. Ascospores 1-septate, polarilocular, hyaline, narrowly ellipsoid, (10-)11.5-15(16.5) x (3.5-)5-6(-7), the septum (2.5-)3.5-5(-6) µm thick. Photobiont chlorococcoid. Spot tests: thallus and apothecia K+ red, C-, KC-, P-. Chemistry: thallus and apothecia with unidentified anthraquinones.
Note: a species with an Alpine distribution, growing mainly on the top of calcareous boulders in sunny and nutrient-enriched sites, often with C. biatorina and Rusavskia elegans. The Italian distribution is poorly known, as the species was frequently confused with C. arnoldii, but probably widespread throughout the calcareous Alps, and also occurring in the Central Apennines. All of the Italian records prior to 2008 were under C. arnoldii.
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

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

(info)

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Altitudinal distribution:

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Felix Schumm - CC BY-SA 4.0
[19567], Austria, Styria, Hochschwab montium Alpium, in monte Griesmauer, alt. 1750 m, in rupibus calcareis. Leg. J. Poelt & A. Vezda, 19.09.1982. VEZDA: LICHENES SELECTI EXSICCATI NR. 1862.



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (32977)
2001/12/04
As Caloplaca arnoldii



Felix Schumm - CC BY-SA 4.0
[19567], Austria, Styria, Hochschwab montium Alpium, in monte Griesmauer, alt. 1750 m, in rupibus calcareis. Leg. J. Poelt & A. Vezda, 19.09.1982. VEZDA: LICHENES SELECTI EXSICCATI NR. 1862.



Felix Schumm - CC BY-SA 4.0
[19567], Austria, Styria, Hochschwab montium Alpium, in monte Griesmauer, alt. 1750 m, in rupibus calcareis. Leg. J. Poelt & A. Vezda, 19.09.1982. VEZDA: LICHENES SELECTI EXSICCATI NR. 1862.
AS Caloplaca arnoldii



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (32977)
2001/11/19



Felix Schumm - CC BY-SA 4.0
[19567], Austria, Styria, Hochschwab montium Alpium, in monte Griesmauer, alt. 1750 m, in rupibus calcareis. Leg. J. Poelt & A. Vezda, 19.09.1982. VEZDA: LICHENES SELECTI EXSICCATI NR. 1862.
AS Caloplaca arnoldii



Felix Schumm; Owner: Felix Schumm - CC BY-SA 4.0
[19567], Austria, Styria, Hochschwab montium Alpium, in monte Griesmauer, alt. 1750 m, in rupibus calcareis. Leg. J. Poelt & A. Vezda, 19.09.1982. VEZDA: LICHENES SELECTI EXSICCATI NR. 1862.
AS Caloplaca arnoldii



Felix Schumm; Owner: Felix Schumm - CC BY-SA 4.0
[19567], Austria, Styria, Hochschwab montium Alpium, in monte Griesmauer, alt. 1750 m, in rupibus calcareis. Leg. J. Poelt & A. Vezda, 19.09.1982. VEZDA: LICHENES SELECTI EXSICCATI NR. 1862.
AS Caloplaca arnoldii



Felix Schumm; Owner: Felix Schumm - CC BY-SA 4.0
[19567], Austria, Styria, Hochschwab montium Alpium, in monte Griesmauer, alt. 1750 m, in rupibus calcareis. Leg. J. Poelt & A. Vezda, 19.09.1982. VEZDA: LICHENES SELECTI EXSICCATI NR. 1862.
AS Caloplaca arnoldii



Juri Nascimbene - CC BY-SA 4.0; Owner: ITALIC - Dyades Project - Dept. of Life Sciences, University of Trieste
Italy, Trentino-Alto Adige, Bolzano/Bozen, Sciliar/Schlern
2007



P.L. Nimis CC BY-SA 04
TSB 38082 as C. arnoldii