ITALIC 8.0

Acarospora bullata Anzi

Atti Soc. Ital. Sc. Nat. Milano, 11: 165, 1868.

Synonyms:

Distribution: N - Lomb, Piem (Reeb & al. 2007), VA (HAL-18600).

Description: Thallus crustose-placodioid, episubstratic, areolate, forming 1-5 cm wide, orbicular patches; areoles round to angular, convex, 0.4-2.5 mm wide, up to 1 mm thick, contiguous or dispersed, epruinose, pale brown to olive-brown, matt, the marginal ones most often elongate and radiating, 1-2.5 mm long and 0.4-1.2 mm wide, the tips usually fan-shaped. Cortex paraplectenchymatous, 45-60 µm thick, reddish brown in upper part, colourless in lower part, overlain by a thin epicortex; algal layer continuous, 70-120 μm thick; medulla white, up to 600 μm thick, prosoplectenchymatous, the hyphae 3-4 μm wide. Apothecia aspicilioid to lecanorine, 1(-3) per areole, round to irregular in outline, 0.3-1.5 mm across, at first punctiform and immersed in the areoles, then with an expanded, dark reddish brown, epruinose or faintly pruinose, gyrose to umbilicate disc, and a rather thick, persistent thalline margin; proper margin often visible as a ring between disc and thalline margin. Proper exciple c. 20-30 µm thick; epithecium reddish brown, c. 15 μm high; hymenium colourless, 80-140(-160) µm high, the hymenial gel IKI+ dark blue or red; paraphyses 1-1.5 µm thick at mid-level, the apical cells only slightly wider; hypothecium colourless. Asci >200-spored, clavate, the apical dome K/I-, Ascospores 1-celled, hyaline, narrowly ellipsoid, 3-5 x 1.5-2 µm. Photobiont chlorococcoid. Spot tests: K-, C- or C+ pink, KC+ pink, P- (reactions often ephemeral, to be observed under the microscope on thallus sections), UV-. Chemistry: gyrophoric acid.

Note: on steeply inclined faces of base-rich, weakly calciferous siliceous rocks in upland areas. Probably more widespread in the Alps. Closely related to the A. peliscypha complex (Knudsen & al. 2010), this species is worthy of further study.

Growth form: Crustose

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)

Commonnes-rarity: (info)

Alpine belt: rare

Subalpine belt: very rare

Oromediterranean belt: absent

Montane belt: extremely rare

Submediterranean belt: absent

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

P.L. Nimis CC BY-SA 04

TSB 14796

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste

Herbarium: TSB (14796)
2001/11/20

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste

Herbarium: TSB (14796)
2001/12/22