ITALIC 8.0

Thelenella melanospora Etayo & H. Mayrhofer

Nova Hedwigia, 77: 111, 2003.

Synonyms:

Distribution: C - Tosc (TSB 35306), Sar (Etayo & Mayrhofer 2003). S - Si (TSB 31103).

Description: Thallus crustose, episubstratic, rimose to rimose-areolate, sometimes almost subsquamulose because of the raised edges of the areoles, greenish grey. Perithecia dark brown to black, solitary or in groups, immersed in thalline warts to half-projecting, 0.2-0.5 mm across, with a central ostiole. Exciple c. 10 μm thick, greenish or brownish in upper part, colourless at base, covered with an irregular, colourless, 10-60 μm thick epinecral layer composed of small crystals and bark remnants; paraphysoids thread-like, persistent, branched and anastomosing; periphyses absent; hymenial gel I-, K/I-. Asci 8-spored, cylindrical, fissitunicate, with two functional wall-layers, the inner wall thin and the outer thick, with an ocular chamber, 80-100 x 12-13 μm, I-. Ascospores uniseriately arranged in the asci, muriform, with 2-4 longitudinal septa, at first hyaline, but soon turning grey to brown, ellipsoid to ovoid, 18-22(-27) x 9-12 μm, the outer wall scarcely thicker than the septa. Photobiont chlorococcoid, the algal cells without a gelatinous sheath. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: on the (mostly) smooth bark of shrubs (e.g. Pistacia) in Mediterranean maquis vegetation. It is included in the Italian red list of epiphytic lichens as “Endangered” (Nascimbene & al. 2013c). See also note on Th. modesta.

Growth form: Crustose

Substrata: bark

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

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

Pioneer species

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: 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

P.L. Nimis CC BY-SA 4.0

TSB 38360

P.L. Nimis CC BY-SA 4.0

TSB 38360