ITALIC 7.0

Verrucaria rapallensis Servít

Stud. Bot. Cech., 11: 121, 1950.

Synonyms:

Distribution: N - Lig.

Description: Thallus crustose, endosubstratic, ochraceous with brownish flecks, sometimes delimited by a black prothallus. Cortex and medulla not developed, the thallus entirely and richly inspersed with crystals. Perithecia black, 0.3-0.5 mm across, immersed in deep pits of the rock, with a slightly convex apical part. Involucrellum black, at first limited to the apical region, then reaching halfway down (or more), including particles of the substrate, diffusely delimited to fringed, laterally diverging and to 150 µm wide; exciple broadly pyriform, 0.3-0.4 mm across, the wall at first colourless but soon turning brown; hamathecium of c. 30 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, (14-)15-19(-21) x 11-13(-14) µm. Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: according to Breuss (2016) this calcicolous species, described from the surroundings of Genova, differs from V. sbarbaronis in the smaller spores and the less projecting perithecia. Indicator values are tentative.

Growth form: Crustose endolithic

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: absent

Submediterranean belt: absent

Padanian area: absent

Humid submediterranean belt: very rare

Humid mediterranean belt: very rare

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

© The Trustees of the Natural History Museum, London – CC BY-SA NC 4.0

Source: • • Breuss O. 2016. Über einige von Miroslav Servít beschriebene Verrucaria-Arten (lichenisierte Ascomycota, Verrucariaceae). Herzogia, 29