ITALIC 8.0

Pyrenodesmia circumalbata (Delile) I.V. Frolov & Vondrák

in Frolov & al., J. Syst. Evol., 59, 3: 470, 2020. Basionym: Lecidea circumalbata Delile - Fl. Égypte: Explic. Pl.: 156, tab. 59, fig. 8, 1813.

Synonyms: Callopisma aegyptiacum Müll. Arg.; Caloplaca aegyptiaca (Müll. Arg.) J. Steiner; Caloplaca circumalbata (Delile) Wunder; Pyrenodesmia aegyptiaca (Müll. Arg.) M. Choisy & Werner

Distribution:

Description: Thallus crustose, episubstratic, areolate, white to ochraceous brown, the areoles 0.2-0.5 mm wide, up to 0.8 mm thick, angular, slightly convex, with an irregular surface, sometimes delimited by a dark prothalline line. Apothecia lecanorine, (0.3-)0.4-0.8(-1.2) mm across, long remaining immersed in the areoles, finally (rarely) subsessile, with a black, sometimes faintly pruinose, flat to slightly convex disc and a white, smooth, persistent thalline margin. Exciple thin, dark in outer part; epithecium pale brown to brown, K+ violet; hymenium colourless, 70-110(-125) μm high, without crystals; paraphyses mostly simple, the apical cells to 3 μm wide; hypothecium colourless or yellowish, c. 100 µm high, without vertical rows of small round paraplectenchymatous cells. Asci 8-spored, clavate, functionally unitunicate, apically thickened with a broad internal beak, the inner part of apex and external cap I+ blue, Teloschistes-type. Ascospores 2-celled, polarilocular, hyaline, broadly ellipsoid, 12-18 x 5-8(-11) μm, the equatorial thickening (“septum”) 1.5-4 μm. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-, UV-. Chemistry: Sedifolia-grey pigment in the apothecia.

Note: a still rather poorly known calcicolous species, described from Egypt and also known from Spain, Greece, Turkey and the Irano-Turanian region. To be looked for in the driest parts of Mediterranean Italy, especially in Sicily.

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Poorly known taxon in need of further study

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

Source: https://botanika.prf.jcu.cz/lichenology/index.php?pg=8&cat=39&idx=

Holotype of Callopisma aegyptiacum, Neotype of Caloplaca circumalbata (GZU 66046)

Felix Schumm – CC BY-SA 4.0

[12287], Griechenland, N-Samos, bei Manolates südlich von Agios Konstandinos, 37°47.185'N, 26°49.533'E, 341 m; halbschattige bis besonnte Terrassenmauern. Leg. Schumm, 02.05.2006, det Schumm 2006.

Felix Schumm – CC BY-SA 4.0

[12287], Griechenland, N-Samos, bei Manolates südlich von Agios Konstandinos, 37°47.185'N, 26°49.533'E, 341 m; halbschattige bis besonnte Terrassenmauern. Leg. Schumm 02.05.2006, det Schumm 2006.

Felix Schumm – CC BY-SA 4.0

[12287], Griechenland, N-Samos, bei Manolates südlich von Agios Konstandinos, 37°47.185'N, 26°49.533'E, 341 m; halbschattige bis besonnte Terrassenmauern. Leg. Schumm 02.05.2006, det Schumm 2006.

Felix Schumm – CC BY-SA 4.0

[12287], Griechenland, N-Samos, bei Manolates südlich von Agios Konstandinos, 37°47.185'N, 26°49.533'E, 341 m; halbschattige bis besonnte Terrassenmauern. Leg. Schumm 02.05.2006, det Schumm 2006.