ITALIC 8.0

Polyblastia etrusca Servít

Ann. Mus. Civ. Stor. Nat. Genova, 66: 241, 1953.

Synonyms:

Distribution: C - Tosc.

Description: Thallus crustose episubstratic, pale brown turning pale olive when wet, verrucose-areolate, the areoles up to 1.2 mm wide, convex, separated by thin fissures, the surface rough, covered in minute, 0.05-0.1 mm wide secondary warts. Cortex up to 20 μm thick, colourless, paraplectenchymatous, the cells c. 2 μm wide; algal layer up to 200 μm thick, inspersed with rock granules; medulla up to 200 μm thick, colourless or patchily brownish in lower part. Perithecia black, largely immersed in the thalline warts, projecting with the naked, up to 0.25 mm wide upper part. Involucrellum carbonaceous, up to 40 μm thick, dimidiate, appressed to exciple or slightly diverging from it in lower part; exciple up to 0.3 mm across, up to 12 μm thick in lower part, brown throughout; hamathecium of 25 μm long periphysoids, interascal filaments absent; hymenial gel hemiamyloid, I+ red (I+ blue at very low concentrations of I), K/I+ blue. Asci 8-spored, clavate, K/I–, fissitunicate, the wall thickened above, with an ocular chamber, dehiscent by extrusion of an endotunica to form a delicate rostrum, 100-120 x 25-28 μm, with biseriately arranged spores. Ascospores submuriform, with 4 transverse septa and up to 3 longitudinal septa, hyaline, ellipsoid or broadly ellipsoid, 22-26 x 15-18 μm. Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: a species which deserves further study, only known from the type collection in the village of Monteliscai (Siena) at c. 320 m, on a cement wall.

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: extremely 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

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

detail of BM001106573 - isotype

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

detail of BM001106573 - isotype

Source: Servít M. 1953. Novae lichenum Pyrenocarporum species in Italia inventae (III). Ann. Mus. Civ. St. Nat. Genova, 66: 236-249. - Public Domain