ITALIC 8.0

Timdalia intricata (H. Magn.) Hafellner

in Hafellner & Türk, Stapfia, 76: 159, 2001. Basionym: Acarospora intricata H. Magn. - Rabenh. Krypt.-Flora, 9: 142, 1935.

Synonyms:

Distribution: N - TAA (Nascimbene 2005), Lomb (Nascimbene 2006).

Description: Thallus crustose-placodioid, tightly attached, dark chestnut brown to almost black, shiny, verrucose-areolate in central parts, more or less distinctly lobed at margins, forming 1-2 cm wide patches. Central areoles convex and wart-like, 0.2-1 mm across, clearly constricted at base; marginal lobes convex, 1(-2) mm long, 0.3-0.5 mm wide, with a pale lower surface, sometimes poorly developed. Cortex paraplectenchymatous; medulla of thick-walled cells. Apothecia 0.2-0.5(-0.8) mm across, persistently immersed in the thallus, 1-2 per areole, with a rather smooth, black disc, soon immarginate. Proper exciple 12-18 μm thick, brownish in outer part, paler within; epithecium brown; hymenium colourless, 80-100 µm high; paraphyses short-celled, (lumina mainly 4-9 µm long), richly branched and anastomosing, 1.5-2 µm thick at base, the apical cells up to 3.5 µm wide; hypothecium colourless in lower part, brown in upper part, 50-100 µm high, rapidly I+ blue. Asci c. 200-spored, broadly clavate, very thick-walled, with a distinct apical dome and a broad chamber, K/I+ blue. Ascospores 1-celled, hyaline, shortly ellipsoid to subglobose, 1.6-2.5(-3) x 1.5-2.6 µm. Pycnidia immersed, flask-shaped. Conidia simple, hyaline, elongate-ellipsoid, c. 2 x 0.6 μm. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P+ yellow (rarely P- in samples from Scandinavia). Chemistry: cortex and medulla with psoromic acid, or rarely without lichen substances.

Note: on base-rich siliceous rocks in sunny, exposed sites, with optimum above treeline; perhaps more widespread in the Alps. For further details see Timdal (1984).

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: rare

Subalpine belt: very rare

Oromediterranean belt: absent

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

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3

4

5

6

(info)

Predictive model

Herbarium samples

Index Fungorum GBIF

Leif Stridvall - Source: www.stridvall.se/lichens/gallery/

Leif Stridvall - Source: www.stridvall.se/lichens/gallery/

Magnusson A. H. (1935) Acarosporaceae, Thelocarpaceae. - In: Rabenhorst G. L.: Kryptogamen-Flora von Deutschland, Österreich, und der Schweiz-. 2nd- IX. Die Flechten. Abt. 5- 1. Gebr. Borntraeger. Leipzig, pp. 1-318. – Public Domain