ITALIC 7.0

Pyrgidium montellicum (Beltr.) Tibell

Lichenologist, 14: 239, 1982. Basionym: Acolium montellicum Beltr. - Lich. Bassan.: 285, 1858.

Synonyms:

Distribution: N - Ven (Nascimbene & Marini 2010).

Description: Thallus crustose, thinly episubstratic, continuous and farinose, whitish, very pale straw-yellow to yellowish grey. Apothecia sessile to shortly stalked, 0.13-0.29 mm high and 0.16-0.33 mm wide, almost spherical to ovoid, without a thalline margin. Proper exciple prosoplectenchymatous, dark brown, c. (10-)22-32(-55) µm thick laterally, gradually attenuating towards the margin, (27-)40-80(-90) µm thick at base. Mazaedium black, filling the apothecial cavity and more or less projecting above the excipular margin; paraphyses 0.4-2 µm thick, septate, unbranched. Asci 8-spored, cylindrical, unitunicate, short pedicellate, persisting almost until the spores have reached full maturity, blunt-tipped, not narrowing towards the apex, which is at first thickened, later reduced or inconspicuous, with uniseriately arranged spores. Ascospores 1-septate, pale to dark brown, broadly ellipsoid to oval, (4-)5.5-6.5(-10) x (2-)3-3.5(-5) µm, with a minute ornamentation of short, irregular, longitudinally arranged ridges. Photobiont absent (sometimes loosely associated with mainly trentepohlioid algae). Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: a mainly tropical species described from the Insubrian region of Italy (the only European record), where it is probably extinct. The hitherto known distribution includes Italy, India, Colombia, and Costa Rica. It is included as “Regionally Extinct” in the Italian red list of epiphytic lichens (Nascimbene & al. 2013c).

Growth form: Fungus

Substrata: bark

Reproductive strategy: mainly sexual

Restricted to humid-warm, oceanic areas

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: 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

D. Puntillo CC BY-SA 04

leg. Tibell, CLU nr. 11316

Domenico Puntillo CC BY-SA 4.0

leg. Tibell, CLU nr. 11316

Chris Tuccinardi, US Herbarium data manager (tuccinar@si.edu) - CC BY-SA NC 3.0

Domenico Puntillo CC BY-SA 4.0

leg. Tibell, CLU nr. 11316