ITALIC 8.0

Acarospora sulphurata var. rubescens Buschardt

in Leuckert & Buschardt, Nova Hedwigia, 30: 802, 1978.

Synonyms:

Distribution: N - TAA.

Description: Thallus crustose, areolate-placodioid, bright yellow to (rarely) greenish yellow in shade-forms, matt, forming up to 4 cm wide rosettes. Lobes 0.5-1 mm wide, crenate, mostly flat; central areoles irregular in shape, c. 1 mm wide, contiguous, flat to subconvex, separated by deep fissures. Cortex 35-50 µm thick, opaque, with more or less perpendicularly aarranged hyphae; algal layer continuous; medulla white, 135-170 µm thick, with crystals dissolving in K. Apothecia lecanorine, up to 10 per areole, at first punctiform and immersed, then slightly expanded, 0.1-0.3 mm across, with a yellowish brown, round to irregular, flat to slightly concave disc and a thin, often indistinct margin. Proper exciple indistinct or to 15 µm wide; epithecium yellowish green to yellowish brown; hymenium colourless, 100-120 µm high; paraphyses 2-2.5 µm thick, the apical cells hardly swollen. Asci >100-spored, clavate, the apical dome conspicuous, K/I-. Ascospores 1-celled, hyaline, globose to subglobose, 2-4(-5.5) x 2-3(-4) µm. Photobiont chlorococcoid. Spot tests: cortex K+ yellow turning red (needle-like crystals), C-, KC-, P- or P+ yellow; medulla K-. Chemistry: upper cortex with rhizocarpic and norstictic acids.

Note: perhaps this is just a chemical strain, hitherto known only from the Alps, which deserves further study.

Growth form: Crustose placodiomorph

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Subcontinental: restricted to areas with a dry-subcontinental climate (e.g. dry Alpine valleys, parts of Mediterranean Italy)

Poorly known taxon in need of further study

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: extremely rare

Submediterranean belt: extremely 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

Index Fungorum GBIF