ITALIC 8.0

Acarospora microcarpa (Nyl.) Wedd.

Bull. Soc. Bot. France, 21: 343, 1874. Basionym: Lecanora schleicheri var. microcarpa Nyl. - Act. Soc. Linn. Bordeaux, 21: 327, 1857.

Synonyms: Acarospora kordofanica sensu Nimis & Poelt non Zahlbr. ex H. Magn.; Acarospora tersa (Fr.) J. Steiner

Distribution: N - TAA, Piem (TSB 10146). C - Tosc, Laz (Tretiach 2004), Sar (Rizzi & al. 2011). S - Camp, Si (Nimis & al. 1996b, Cataldo & Cannavò 2014).

Description: Thallus crustose, episubstratic, bright greenish yellow, epruinose, consisting of 0.2-1(-2) mm wide, scattered or clustered, flat, irregular, angular areoles with pale margins and lower surface, when well-developed forming up to 1-2 cm wide patches, usually starting the life-cycle on the thalli of Diploschistes actinostoma. Cortex paraplectenchymatous, 35-70 µm thick; algal layer continuous; medulla white. Apothecia lecanorine, 0.1-0.4 mm across, immersed in the areoles, 1-4(-8) per areole, with a dark brown, punctiform disc and an evident, not or only slightly raised thalline margin. Proper exciple 15-25 µm wide at base, up to 85 µm wide in upper part; epithecium brownish; hymenium colourless, 120-140 µm high; paraphyses 1.5-2 µm thick at base, the apical cells hardly swollen; hypothecium colourless, up to 35 µm high. Asci 100-200-spored, cylindrical-clavate, the apical dome K/I-, 60-100 x 12-17 µm. Ascospores 1-celled, hyaline, broadly ellipsoid, 3-4(-6) x 2-3(-4) µm. Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P-, UV+ orange. Chemistry: cortex with rhizocarpic acid.

Note: a mainly Mediterranean-Atlantic species with optimum in coastal Tyrrhenian Italy, on base-rich siliceous rocks wetted by rain, growing on the thalli of Diploschistes,, especially D. actinostoma. The species also occurs in the dry-continental Alpine valleys.

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

paras

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: absent

Submediterranean belt: extremely rare

Padanian area: absent

Humid submediterranean belt: very rare

Humid mediterranean belt: rather rare

Dry mediterranean belt: extremely rare

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

Domenico Puntillo; Owner: Domenico Puntillo

Italy, Puntillo 8351

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

Herbarium: TSB (17709)
2001/12/12
on the host, Diploschistes actinostomus

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

Herbarium: TSB (17709)
2001/12/12