ITALIC 8.0

Gyalectidium minus Sérus.

in Ferraro & al., Bot. J. Linn. Soc., 137: 340, 2001.

Synonyms:

Distribution: S - Camp (Puntillo & al. 2000, Puntillo 2000, Nimis & Tretiach 2004, Ferraro & al. 2001, Puntillo & Puntillo 2011).

Description: Thallus crustose, thinly episubstratic, forming 0.3-1.5 mm wide, angular to rounded, often sublobulate patches, areolate-bullate, the areoles encrusted with a continuous layer of crystals, silvery to whitish grey, sometimes patchily greenish at margins. Hyphophores submarginal to marginal, their scales small, emerging from a slightly inflated crystalline bulge, obliquely orientated, triangular to irregularly laciniate, 0.07-0.1 mm long and 0.1-0.2 mm broad, bluish grey when young, turning whitish and translucent when old. Apothecia very rare and usually immature or poorly developed, 1-3(-4) per thallus patch, 0.1-0.15 mm across, with a pale orange, pinkish or dark grey disc, and a slightly prominent, whitish margin. Ascospores not known. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: only known from a single station in Italy, on leaves of Buxus, Laurus, Phillyrea, and on cladodes of Ruscus in a warm-humid, coastal gorge; earlier records of G. caucasicum from Italy refer to this species, which is included in the Italian red list of epiphytic lichens as “Critically Endangered” (Nascimbene & al. 2013c).

Growth form: Crustose

Substrata: leaves

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly asexual, by conidia and thalloconidia

Restricted to humid-warm, oceanic areas

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: absent

Submediterranean belt: absent

Padanian area: absent

Humid submediterranean belt: absent

Humid mediterranean belt: extremely 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

P.L. Nimis CC BY-SA 4.0

TSB 10524

Pier Luigi Nimis - CC BY-SA 4.0

Herbarium: TSB 9492

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

Herbarium: TSB (10524)
2001/11/24