ITALIC 8.0

Acarospora paupera H. Magn.

K. svenska Vetensk-Akad. Handl., Ser. 3, 7, 4: 167, 1929

Synonyms: Acarospora tongletii var. paupera (H. Magn.) Clauzade & Cl. Roux

Distribution: N - Piem (TO 509), Lig.

Description: Thallus crustose, episubstratic, rimose-areolate, well delimited, whitish, grey to yellowish brown, the areoles small, usually not well-visible because hidden by the numerous apothecia. Algal layer discontinuous, interrupted by vertically oriented hyphal bundles. Apothecia lecanorine, 0.2-0.6 mm across, 1-3(-5) per areole, at first immersed, then more or less projecting, round to angular or slightly elongated, sometimes confluent, with a concave, smooth to slightly rugose, dark brown disc and a prominent, entire thalline margin. Epithecium yellowish brown, K+ yellow turning red (needle-like crystals); hymenium colourless, 60-120(-130) μm high; paraphyses 1.5-2 μm thick at base, the apical cells 3-5 μm wide; hypothecium colourless, K-. Asci 100-200-spored, clavate, the apical dome K/I-. Ascospores 1-celled, hyaline, ellipsoid to subcylindrical, 3-6.5 x 1.5-2 μm. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-, UV-; but thalline margin of apothecia and epithecium K+ yellow turning red (needle-like red crystals). Chemistry: thallus without lichen substances; apothecia (epithecium and thalline margin) with norstictic acid.

Note: a temperate to boreal-montane, probably circumpolar species, in Italy most frequent on base-rich sandstone walls, but much overlooked.

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: extremely rare

Oromediterranean belt: absent

Montane belt: very rare

Submediterranean belt: very rare

Padanian area: extremely rare

Humid submediterranean belt: very rare

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

© The Trustees of the Natural History Museum, London - http://creativecommons.org/licenses/by/4.0/