ITALIC 8.0

Chaenotheca laevigata Nádv.

Repert. Spec. Nov. Regni Veg., 36: 309, 1934.

Synonyms:

Distribution: N - TAA (Nascimbene & al. 2009, 2010, 2022, Nimis & al. 2015). S - Cal (Puntillo 1994, 1996, Puntillo & Puntillo 2009).

Description: Thallus crustose, endosubstratic and poorly evident, rarely episubstratic and granulose, the granules corticate, 8-15 µm thick. Apothecia stalked, pin-like, 1.3-1.9 mm high. Stalk 0.06-0.09 mm thick, covered in a greenish yellow pruina, of periclinally arranged, medium brown hyphae. Capitulum 0.2-0.4 mm across, obovoid to broadly obconical, yellow-pruinose on lower side, the mazaedium well-developed, brown. Exciple well-developed, of periclinally arranged, brown hyphae; hypothecium obconical, dark brown, with a flat or slightly concave upper surface, of irregularly intertwined, dark brown, sclerotized hyphae. Asci cylindrical, distinctly stalked, formed singly, dissolving early, with 1- to 2-seriately arranged ascospores. Ascospores 1-celled, ellipsoid to short-cylindrical, brown, 6-7 x 3-3.5 µm, with a rough ornamentation formed by irregular cracks. Photobiont chlorococcoid, with globose cells. Spot tests: thallus K-, C-, KC-, P-. Chemistry: thallus without lichen substances; yellow pruina consisting of vulpinic acid.

Note: a cool-temperate to southern boreal-montane lichen found in bark fissures of acid-barked deciduous and coniferous trees in humid montane forests, more rarely on lignum. Known from a few stations from the Alps to the mountains of Calabria: probably overlooked and more widespread, but certainly never common. It is included in the Italian red list of epiphytic lichens as “Endangered” (Nascimbene & al. 2013c).

Growth form: Crustose

Substrata: bark and lignum

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

In underhangs rarely wetted by rain

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: very rare

Submediterranean belt: absent

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

Herbarium samples

Index Fungorum GBIF

Helge G. Gundersen Norway www.helgegg.net