ITALIC 8.0

Acarospora aeginaica H. Magn.

Göteborgs Kungl. Vetensk. Samhälles Handl., Ser. B, Math. Naturvet. Skr. 6, 17: 19, 1956.

Synonyms:

Distribution:

Description: Thallus crustose, episubstratic, areolate-subsquamulose, densely white-pruinose, the areoles 0.5-1 mm wide, at first flat, then convex and radially fissured or reticulately grooved, dispersed or contiguous and separated by deep fissures, reddish brown, but almost always appearing white due to the thick layer of pruina. Epicortex with small crystals dissolving in K; cortex brown in upper part, colourless in lower part; algal layer continuous; medulla white, I-. Apothecia lecanorine, immersed, up to 0.8(-1) mm across, with a black to brown-black disc and a soon excluded thalline margin. Proper exciple prosoplectenchymatous, I-; epithecium brown; hymenium colourless, 80-100 µm high, the hymenial gel hemiamyloid, I+ light blue fading to light red; paraphyses 1-1.5(-2) µm thick, the apical cells hardly swollen; subhymenium 30-50 µm high, I+ blue; hypothecium narrow, usually 10 µm high. Asci 200-300-spored, clavate, the apical dome K/I-. Ascospores 1-celled, hyaline, globose, 3–3.5 µm wide. Photobiont chlorococcoid. Spot tests: cortex and medulla K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: a species of the A. strigata-group (see Nurtai & al. 2017), hitherto known only from the Greek islands, growing on the thalli of aspicilioid lichens. To be looked for in Mediterranean Italy.

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

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

Harrrie Sipman. Source: http://www.bgbm.org/digitalimages/Aegean/Acarospora/aeginaica59891.jpg