ITALIC 8.0

Rhizocarpon simillimum (Anzi) Lettau

Hedwigia, 52: 156, 1912. Basionym: Buellia simillima Anzi - Comm. Soc. Critt. Ital., 2, 1: 19, 1864.

Synonyms: Buellia subbadia Anzi; Catocarpus simillimus (Anzi) Arnold; Rhizocarpon atroalbum var. africanum Flagey; Rhizocarpon sublestum (Nyl.) Zahlbr.

Distribution: N - Frl (TSB 4365), TAA (Nascimbene & al. 2022), Lomb, Piem (Giordani & al. 2014), VA (Piervittori & Isocrono 1999, Valcuvia 2000, Matteucci & al. 2015c), Emil (Fariselli & al. 2020). C - Tosc, Sar (Nöske 2000). S - Camp (Garofalo & al. 1999), Cal (Puntillo 1996).

Description: Thallus crustose, episubstratic, dark grey to dark brown, rimose-areolate, forming up to 8(-10) mm wide patches delimited by a dark prothallus, the areoles contiguous or scattered, rounded to angular, mostly flat, up to 0.3 mm in diam. Medulla white, I+ deep blue. Apothecia round to angular, 0.2-0.5(-0.8) mm across, with a more or less flat, epruinose disc and a thin, usually persistent, sometimes finally excluded proper margin. Proper exciple brownish black in outer part, paler within, K+ purple-red (solution); epithecium brown to brown-black, without crystals, K- or K+ faintly purple-red; hymenium colourless, 70-85 µm high; hypothecium dark brown, K+ purple-red. Asci 8-spored, clavate, fissitunicate, with a well-developed tholus that is K/I- in lower part and K/I+ blue near the apex, lacking an ocular chamber, Rhizocarpon-type. Ascospores 1-septate, soon dark brown-black, ellipsoid, 10-16 x 5-8 µm, halonate at least when young. Photobiont chlorococcoid. Spot tests: medulla K- or K+ pale yellow, C-, KC-, P- or P+ faintly yellow-orange. Chemistry: without lichen substances, or with variable amounts of stictic acid.

Note: on steeply inclined surfaces of siliceous, base-rich or slightly calciferous rocks in upland areas; present both in the Alps and along the Apennines, south to the mountains of Calabria.

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: rare

Subalpine belt: rather common

Oromediterranean belt: very rare

Montane belt: rare

Submediterranean belt: absent

Padanian area: absent

Humid submediterranean belt: absent

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 DOLICHENS

Einar Timdal - Source: http://nhm2.uio.no/lav/web/index.html - CC BY-NC