ITALIC 8.0

Diploschistes candidissimus (Kremp.) Zahlbr.

Cat. Lich. Univ., 2: 660, 1924. Basionym: Limboria candidissima Kremp. in Unger & Kotschy - Die Insel Cypern: 166, 1865.

Synonyms: Acrorixis actinostoma var. tectorum (A. Massal.) Trevis.; Diploschistes actinostoma var. farinosus (Anzi) Zahlbr.; Diploschistes calcareus (Müll. Arg.) J. Steiner; Diploschistes farinosus (Anzi) Vězda; Limboria actinostoma var. tectorum A. Massal.; Urceolaria actinostoma var. farinosa Anzi; Urceolaria actinostoma var. tectorum (A. Massal.) Jatta

Distribution: N - Ven (Lazzarin 2000b), TAA, Piem (TSB 33971), Emil (Fariselli & al. 2020). C - Tosc.

Description: Thallus crustose, episubstratic, well-delimited and forming large patches, rimose-areolate, consisting of 0.5-4 mm wide and 0.3-1.8 mm thick, irregularly angular, flat to slightly convex, chalky white, heavily pruinose areoles. Apothecia common, perithecioid, immersed in the areoles, up to 1.5 mm across (in section), with a blackish, urceolate to finally flat disc not visible from above, being concealed by a thick, radially sulcate proper margin. Proper exciple up to 70 µm thick, carbonized, pseudoparenchymatous; epithecium poorly differentiated, colourless to brownish; hymenium colourless, 120-160 µm high, non-amyloid; paraphyses simple, flexuose, 1.1.5 µm thick, not swollen at apex; hypothecium colourless 10-15 µm high. Asci 4-8-spored, cylindrical to subclavate, the wall eventy thickened, with an abrupt apical thickening and a thin internal apical beak, the contents I+ orange-red, the walls I-, not fissitunicate. Ascospores muriform, with 4-6 transverse and 1-3 longitudinal septa, at first hyaline then brown, broadly ellipsoid, 20-34 x (10-)14-20 µm. Pycnidia black, immersed. Conidia bacilliform. Photobiont chlorococcoid. Spot tests: thallus K-, C+ red, KC-, P-, UV-. Chemistry: lecanoric acid.

Note: a mainly Mediterranean species growing on compact calciferous rocks, also found in dry Alpine valleys. The species is both morphologically and molecularly different from D. actinostoma.

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: extremely rare

Submediterranean belt: extremely rare

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

Herbarium samples

Index Fungorum GBIF

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste

Herbarium: TSB (33971)
2001/12/13

Pier Luigi Nimis - CC BY-SA 4.0

TSB 33971

Pier Luigi Nimis - CC BY-SA 4.0

TSB 33971