ITALIC 8.0

Verrucaria transiliens (Arnold) Lettau

Hedwigia, 52: 89, 1912. Basionym: Amphoridium transiliens Arnold - Denkschr. kgl. bayer. bot. Ges., 6: 42, 1890.

Synonyms:

Distribution: N - Frl (Breuss 2008), TAA (Herb. Nascimbene 1658), Piem, Lig. C - Umb (Herb. Ravera 2084).

Description: Thallus crustose, hemiendosubstratic to very thinly episubstratic, whitish grey, pale brown or dark grey-brown, when well-developed finely rimose to minutely areolate. Perithecia black, to 150/cm², ½-¾ immersed, the apical part projecting, 0.3-0.5 mm across, slightly conical with somehow flattened top to almost hemispherical, the flanks covered with a thin, whitish-farinose thalline layer. Involucrellum surrounding almost completely the exciple, but thinner in lower part, laterally 50-80 μm thick, unsharply delimited and often fringed-eroded in outer part; exciple globose, 0.27-0.4 mm across, the wall dark brown and difficult to separate from the closely adpressed involucrellum; hamathecium of 30-40 μm long periphyses and periphysoids, interascal filaments absent; hymenial gel hemiamyloid, I+ red (I+ blue at very low concentrations of I), K/I+ blue. Asci 8-spored, clavate, I-, fissitunicate, the wall thickened above, with an ocular chamber, dehiscent by extrusion of an endotunica to form a delicate rostrum, Verrucaria-type. Ascospores 1-celled, hyaline, ellipsoid, (22-)24-31(-33) x 12-16 μm. Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: on calcareous pebbles (e.g. on calciferous sandstone) near the ground, especially in clearings of woodlands and on track sides; probably more widespread, having being overlooked, or confused with similar species. For further details see Breuss (2004).

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: very rare

Submediterranean belt: very rare

Padanian area: extremely rare

Humid submediterranean belt: very rare

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

Index Fungorum GBIF

P.L. Nimis CC BY-SA 04

TSB 20456

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste

Herbarium: TSB (20456)
2002/02/23

Source: • Breuss O. 2004. Neue Flechtenfunde, vorwiegend pyrenocarper Arten, aus Oberösterreich. Öst. Z. Pilzk., 13: 267-275.