ITALIC 7.0

Verruculopsis flavescentaria Gueidan, Nav.-Ros. & Cl. Roux

in Navarro-Rosinés & al., Bull. Soc. linn. Provence, 58: 166, 2007.

Synonyms:

Distribution: N - VG (vidi!).

Description: Thallus crustose, verrucose to subsquamulose-areolate, forming 2-15 mm wide patches on the thalli of Variospora flavescens. Areoles scattered or more often clustered, usually convex and wart-like, 0.5-3.2 mm wide, 0.25-0.5 mm thick, the surface uneven, pale grey-brown to dark brown, often at least partially white-pruinose. Pseudocortex with many crystals, overlain by an epinecral layer; medulla white, with large crystals, I-. Perithecia 0.15-0.2 μm across, fully immersed or slightly projecting, 1-4(-6) per areole. Involucrellum absent; exciple at first colourless, but soon turning dark brown in upper part, pale brown in lower part; hymenium colourless, I+ reddish; hamathecium of periphyses along the ostiolar channel, pseudoparaphyses in upper part of the perithecium, and paraphyses disappearing early. Asci 8-spored, clavate, fissitunicate and bitunicate, the wall not amyloid, not or only slightly thickened above, Verrucaria-type. Ascospores 1-celled, hyaline, narrowly ellipsoid, often of different sizes in the same ascus, (8.5-)11-16(-19.5) x (3.5-)4.5-6(-7) μm. Pycnidia black, immersed, Dermatocarpon-type, 0.07-0.11 μm in diam. Conidia simple, hyaline bacilliform, 4-5.5 x 1-1.5 μm. Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: recently-described and certainly more widespread, especially in Mediterranean Italy, this lichenicolous lichen growing on the thalli of Variospora lavescens has a narrower range than its host, as it mostly occurs in rather shaded situations. The species has been observed on the wall of a private house at San Lorenzo near Trieste.

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

paras Variospora flavescens

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: absent

Submediterranean belt: rare

Padanian area: absent

Humid submediterranean belt: rare

Humid mediterranean belt: rather rare

Dry mediterranean belt: rather rare

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

Index Fungorum GBIF

P.L. Nimis CC BY-SA 04

TSB 6174

Harrie Sipman – Source http://www.bgbm.fu-berlin.de/sipman/Zschackia/AegeanLichens/CaloplacaAC.htm - As Caloplaca oasis

Pier Luigi Nimis; Owner: Department of Life Sciences, University of Trieste

Herbarium: TSB (6174)