ITALIC 8.0

Verrucaria apomelaena (A. Massal.) Hepp

Flecht. Eur.: nr. 684, 1860. Basionym: Lithocia apomelaena A. Massal. - Framm. Lichenogr.: 23, 61: 1855.

Synonyms:

Distribution: N - Ven (Lazzarin 2000b), Emil (Fariselli & al. 2020), Lig (Watson 2014).

Description: Thallus crustose, episubstratic, up to 0.25 mm thick, rimose-areolate, without a clear prothallus, the areoles 0.1-0.3 mm wide, brown but often more or less whitish-pruinose, dull, with acute angles, separated by whitish fissures. Cortex very thin, composed by a few layers of cells; algal layer to c. 80 μm thick; medulla white to patchily pale brown, filled by crystals. Perithecia immersed in the largest areoles, completely covered by a thin thalline layer and forming convex-flattened, 0.4-0.7 mm wide warts, the apex c. 0.2 mm wide, with a hardly visible ostiole. Involucrellum reaching to base-level, in upper part adpressed to exciple and up to 60 μm thick, in lower part up to 80 μm thick; exciple globose, up to 0.35 mm across, the wall at first colourless, then often dark brown, thinner in basal part; hamathecium of sparingly branched, 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, 20-25 x 10-13(-14) μm. Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: a rather poorly known species found both on limestone and on calciferous sandstone below treeline.

Growth form: Crustose

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: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: very rare

Submediterranean belt: very rare

Padanian area: absent

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

Index Fungorum GBIF

Source: Servit, M 1949: Nove nebo mene zname druhy lisejnikove celedi Verrucariaceae. Species Verrucariacearum (Lichenes) novae vel minus cognitae. - Sbornik Narodniho Musea v Praze 5(9): 1-51. Tab.1 - Public Domain