ITALIC 7.0

Acolium karelicum (Vain.) M. Prieto & Wedin

Fungal Divers., 2016 (MB 817532). Basionym: Cyphelium lucidum var. karelicum Vain. - Acta Soc. Fauna Fl. Fenn., 57, 1: 20, 1927.

Synonyms: Cyphelium karelicum (Vain.) Räsänen

Distribution: N - TAA (Thor & Nascimbene 2007, Nascimbene & al. 2008c, 2009, 2010, 2022, Nimis & al. 2015). S - Bas (Puntillo & Puntillo 2009, Puntillo & al. 2012), Cal (Puntillo 1994, 1996, Puntillo & Puntillo 2009).

Description: Thallus crustose, episubstratic, rather thin, verrucose or subareolate, smooth, greenish grey when fresh, assuming a brownish tinge in the herbarium. Apothecia sessile, short-cylindrical or lenticular, 0.3-0.7 mm across, 0.3-0.4 mm high, with a black, flattened mazaedium and a slightly pruinose margin. Proper exciple 40-140 µm thick laterally, expanded at the base up to 380 µm, of dark brown, sclerotized hyphae; hypothecium 110-140 µm thick, of periclinally arranged, sclerotized hyphae. Asci cylindrical, formed singly from hooked ascogenous hyphae, persisting until the spores are nearly ripe, with uniseriately arranged spores. Ascospores 1-septate, clearly constricted at septum, dark brown, ellipsoid, 12-17 x 7.5-10 µm, the wall at first smooth, later with cracks delimiting irregular polygonal areas. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-. Chemistry: placodiolic acid and three unidentified substances.

Note: a mainly cool-temperate to southern boreal-montane lichen found on ancient boles of conifers in semi-natural montane forests, often on basal parts of trunks, mostly on old Abies, much more rarely on lignum; to be looked for further in the Alps. It is included in the Italian red list of epiphytic lichens as “Endangered” (Nascimbene & al. 2013c).

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)

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

Walter Obermayer CC BY-SA 4.0 - Source: Lichens of Noricum - http://lichens-of-noricum.uni-graz.at/

Leif Stridvall - Source: http://www.stridvall.se/lichens/gallery/

Courtesy: Anita Stridvall

Helge G. Gundersen ; Owner: Helge G. Gundersen

Norway
www.helgegg.net

Walter Obermayer CC BY-SA 4.0 - Source: Lichens of Noricum - http://lichens-of-noricum.uni-graz.at/

Walter Obermayer CC BY-SA 4.0 - Source: Lichens of Noricum - http://lichens-of-noricum.uni-graz.at/

Leif Stridvall - http://www.stridvall.se/la/galleries.php (Courtesy: Anita Stridvall)

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_A/Textes_A3/Acolium_karelicum.htm

France, sur Picea abies - Bellefontaine - Jura
14/5/2017

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_A/Textes_A3/Acolium_karelicum.htm

France, sur Picea abies - Bellefontaine - Jura
14/5/2017

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_A/Textes_A3/Acolium_karelicum.htm

France, sur Picea abies - Bellefontaine - Jura
14/5/2017