Protoparmeliopsis muralis var. subcartilaginea (Poelt) ined.

Provisionally placed here, ICN Art. 36.1b.. Basionym: Lecanora muralis var. subcartilaginea A. Massal. ex Poelt - Mitt. bot. Staatss. München, 2: 500, 1958.
Synonyms: Squamaria saxicola var. subcartilaginea A. Massal. nom.nud.
Description: Thallus crustose-placodioid, episubstratic, firmly attached, very thick, forming quite irregular rosettes, yellowish green to grey-green, somewhat shiny, areolate in central parts, lobed at margins, the lobes short, c. as long as wide, flat to usually convex, contiguous, smooth, usually epruinose. Upper cortex inspersed with yellowish granules which are soluble in K and insoluble in N, overlain by an epinecral layer; medulla white, rather loose but never becoming hollow; lower cortex mostly confined to the tips or margins of lobes, poorly developed. Apothecia lecanorine, crowded to sparse, 1.5-2.5 mm across, sessile, with a flat, pale brown to pinkish brown disc and a smooth, persistent thalline margin. Thalline exciple corticate, paraplectenchymatous; proper exciple thin, prosoplectenchymatous; epithecium pale yellow to brown, with granular crystals not dissolving in K; hymenium colourless, 50-80 µm high, I+ blue; paraphyses coherent, mainly simple or sparingly branched in upper part, the apical cells only slightly swollen; hypothecium colourless to yellowish. Asci 8-spored, elongate-clavate, very thin-walled, with a K/I+ blue, tall tholus penetrated by a faintly amyloid apical cushion, the wall K/I-, surrounded by a K/I+ blue outer layer, Lecanora-type. Ascospores 1-celled, hyaline, ellipsoid, 8-15 x 4-7 µm. Photobiont chlorococcoid. Spot tests: thallus K- or K+ very pale yellow, C-, KC+ pale yellow, P- or P+ faintly yellow. Chemistry: cortex with usnic acid, medulla with zeorin and different triterpenoids.
Growth form: Crustose placodiomorph
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Poorly known taxon in need of further study

Commonnes-rarity: (info)

Alpine belt: rare
Subalpine belt: extremely rare
Montane belt: absent
Dry submediterranean belt: absent
Humid submediterranean belt: absent
Padanian area: 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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Rarity

absent
extremely rare
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Predictive map

P.L. Nimis CC BY-SA 04
TSB 34797


P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (34797)
2002/02/02
center of thallus with apothecia


P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (34797)
2002/02/02
marginal lobes


P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (34797)
2002/02/02


Sebastiano Dose - CC BY 4.0
Armenia, 09.2024. leg., Dose, Nimis & Muggia TSB 45158