ITALIC 7.0

Verrucaria despecta Servít

Ann. Mus. Civ. Stor. Nat. Genova, 66: 237, 1953

Synonyms:

Distribution: N - Lig (Servít 1953).

Description: Thallus crustose, thinly episubstratic, dirty white to whitish grey, rimose-areolate, forming 1-3 cm wide patches, without a clear prothallus, the areoles polygonal, 0.4-0.8 mm wide, flat but minutely verruculose, subdivided by thin fissures. Cortex up to 25 μm thick, colourless; algal layer 80-100 μm thick, inspersed with crystals; medulla poorly developed. Perithecia black, numerous, arising inbetween or at the edges of the areoles, c 0.18 mm across, immersed in lower third but hemispherically projecting, with a distinct ostiole. Involucrellum dimidiate, adpressed to exciple or slightly diverging in lower part, brown-black, 40-50 μm thick; exciple globose, 130-160 μm wide, the wall pigmented only in apical part, c. 10 μm thick in lower part; hamathecium of 15-21 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, 40-50 x 12-15 μm, Verrucaria-type. Ascospores 1-celled, hyaline, ellipsoid or oblong-ellipsoid, 14-16 x 7-8 μm, the wall c. 0.3 μm thick. Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: a calcicolous species, only known from the type locality in Liguria.

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: absent

Submediterranean belt: absent

Padanian area: absent

Humid submediterranean belt: absent

Humid mediterranean belt: very rare

Dry mediterranean belt: very 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

Herbarium samples

Index Fungorum GBIF

Natural History Museum (2014). Dataset: Collection specimens. Resource: Specimens. Natural History Museum Data Portal (data.nhm.ac.uk). https://doi.org/10.5519/0002965 Retrieved: 14:36 19 Dec 2021 (GMT)