ITALIC 8.0

Caloplaca egeana Cl. Roux & Nav.-Ros.

Bull. Soc. linn. Provence, 43: 98, 1992.

Synonyms:

Distribution: C - Sar (Herb. Vondrák 10781).

Description: Thallus crustose, episubstratic, well-evident, areolate, chalky white, well-delimited, the areoles 0.2- 0.5(-0.8) mm wide, 0.05-0.2 mm thick, angulose, flat, with a rough surface which is often subdivided by small cracks. Apothecia zeorine, more or less round in outline, (0.1-)0.2-0.4(-0.5) mm across, orange to brownish orange, 1-2(-3) per areole, at first urceolate and immersed in the thallus, then adnate, not constricted at base, with a concave to flat disc and a thin, concolorous or slightly paler, persistent of finally excluded proper margin. Thalline exciple developed only at the base of the apothecium, rich in algae; proper exciple 40-75 μm wide, prosoplectenchymatous, with a 20-30 μm wide, pigmented cortex and a colourless medullary part, of radiating hyphae whose lumina measure 2-6 x 2 μm; epithecium orange-brown, rich in crystals of anthraquinones, 8-20 μm high, K+ purple-red; hymenium colourless, 60-90 μm high; paraphyses simple or forked in upper part 1.5-2 μm thick at base, the apical cells swollen, 4-7(-8) μm wide; hypothecium colourless, prosoplectenchymatous. 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, 40-55 x 13-18 μm. Ascospores 2-celled, polarilocular, hyaline, ellipsoid, (10-)11-14 x (5-)6-7 μm, the equatorial thickening (“septum”) 3-4(-5) μm, c. 1/3 of spore-length. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-; apothecia K+ purple-red. Chemistry: thallus without lichen substances, apothecia with unidentified anthraquinones.

Note: a maritime species described from Portugal, growing on calcareous rocks. The Italian sample was collected at Cala Mosca, in the province of Cagliari. The species does not belong to Caloplaca s.str.

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Taxon bound to maritime-coastal situations

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: extremely rare

Dry mediterranean belt: extremely 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

Source: https://botanika.prf.jcu.cz/lichenology/index.php?pg=5&func=cat&idx=32

Portugal 1983 van den Boom 845