ITALIC 7.0

Acarospora similis H. Magn.

K. Svenska Vetensk.-Akad. Handl., ser. 3, 7, 4: 175, 1929.

Synonyms:

Distribution: N - Ven (Nascimbene & al. 2021), TAA (B-8504 Leg. H. Sipman), Emil (Ravera & al. 2022b).

Description: Thallus crustose, episubstratic, areolate-subsquamulose, without a distinct prothallus, forming c. 1 cm wide patches. Areoles 0.2-1.4 mm wide, contiguous, irregular in shape, sometimes sublobulate, slightly concave to flat, dark chestnut brown, epruinose. Apothecia lecanorine, 0.1-0.6 mm across, rounded or sometimes irregular by mutual compression, at first immersed then slightly protruding, with a slightly concave to flat, rugose, sometimes umbonate, dark brown disc (darker than thallus), and a usually paler brown, raised, smooth thalline margin. Epithecium yellowish brown; hymenium colourless, 50-90 µm high, paraphyses c. 1.5 µm thick, the apical cells capitate, 3-4 µm wide; hypothecium colourless, 15-35 µm high. Asci 100(-200)-spored, clavate, the apical dome K/I-. Ascospores 1-celled, hyaline, narrowly ellipsoid to cylindrical, 3-6.5 x 1-2 μm. Photobiont chlorococcoid. Spot tests: cortex and medulla K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: a lignicolous species, often found on woody roofing tiles, from the dry submediterranean to the subalpine belt.

Growth form: Crustose

Substrata: lignum

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Poorly known taxon in need of further study

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: very rare

Oromediterranean belt: absent

Montane belt: very rare

Submediterranean belt: very rare

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

P.L. Nimis CC BY-SA 04

TSB 42609

P.L. Nimis CC BY-SA 04

TSB 42609

P.L. Nimis CC BY-SA 4.0

TSB 42609

P.L. Nimis CC BY-SA 04

TSB 42609

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_A/Textes_A2/Acarospora_similis.htm

France, stage micro de nov. 2015 - Saint-Prejet-Armandon - Haute-Loire

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_A/Textes_A2/Acarospora_similis.htm

France, stage micro de nov. 2015 - Saint-Prejet-Armandon - Haute-Loire