ITALIC 8.0

Pertusaria amarescens Nyl.

Flora, 57: 311, 1874.

Synonyms: Pertusaria affinis Erichsen; Pertusaria coudercii Harm.; Pertusaria flavicans var. coudercii (Harm.) Erichsen; Pertusaria flavicans var. schistosa Erichsen

Distribution: N - Ven, Lig. C - Tosc, Laz (TSB 8630), Sar. S - Si (Ottonello & Romano 1997, Grillo 1998, Grillo & Caniglia 2004).

Description: Thallus crustose, episubstratic, rather thin, continuous to rimose, pale grey or whitish grey, sometimes with a yellowish tinge, at first radiately rimose, later rimose-areolate, sorediate. Soralia maculiform, 0.3-0.8 mm across, slightly paler than thallus, at first orbicular, then often confluent and diffuse. Apothecia and pycnidia unknown. Spot tests: thallus K+ yellow, C+ orange, KC+ orange, P-; soralia P+ brick-red (slow reaction), UV+ pale orange and more or less spotted blue-white. Chemistry: thiophaninic, stictic, menegazziaic acids and variable amounts of norstictic acid.

Note: on basic or slightly calciferous siliceous rocks. A poorly known and often misunderstood temperate taxon; some records could refer to P. flavicans, others to P. aspergilla. Here, except the recent record from Sicily, only records checked by Hanko (1983) and by myself are accepted.

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly asexual, by soredia, or soredia-like structures (e.g. blastidia)

Most common in areas with a humid-warm climate (e.g. most of Tyrrenian 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: rare

Humid mediterranean belt: very rare

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

Pier Luigi Nimis

Italy, Sicily, Island of Linosa
TSB 17321