ITALIC 8.0

Protoparmeliopsis muralis var. subcartilaginea (Poelt)

Provisionally placed here, ICN Art. 36.1b.. Basionym: Lecanora muralis var. subcartilaginea A. Massal. ex Poelt - Mitt. bot. Staatss. München, 19-20: 500, 1958.

Synonyms:

Distribution: N - Frl (Tretiach & Hafellner 2000), Ven, Piem (TSB 34019). S - Camp (Ricciardi & al. 2000), Si (Nimis & al. 1996b, Ottonello 1996).

Description: Thallus crustose-placodioid, episubstratic, firmly attached, very thick, forming quite irregular rosettes, yellowish green to grey-green, somewhat shiny, epruinose, areolate in the center, lobed at margins. Lobes short, c. as long as wide, flat to usually convex, contiguous, smooth, usually epruinose. Upper cortex inspersed with yellowish granules (soluble in K, 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. 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-, P- or P+ pale yellow,. Chemistry: cortex with usnic acid, medulla with zeorin, and different triterpenoids.

Note: on horizontal to weakly inclined surfaces of siliceous rocks in upland areas. A poorly known taxon, well worthy of further study.

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

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:

1

2

3

4

5

(info)

Solar irradiation:

1

2

3

4

5

(info)

Aridity:

1

2

3

4

5

(info)

Eutrophication:

1

2

3

4

5

(info)

Poleotolerance:

0

1

2

3

(info)

Altitudinal distribution:

1

2

3

4

5

6

(info)

Predictive model

Herbarium samples

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