ITALIC 8.0

Leptogium cochleatum (Dicks.) P.M. Jørg. & P. James

Lichenologist, 15: 113, 1983. Basionym: Lichen cochleatus Dicks. - Fasc. Crypt. Brit., 1: 13, 1785.

Synonyms: Leptogium azureum auct. p.p.

Distribution: C - Laz. S - Cal (Puntillo 1996), Si (Grillo 1998, Grillo & Caniglia 2004, Ottonello & al. 2011).

Description: Thallus foliose, subgelatinous when wet, lead-grey, 100-150(-200) µm thick, forming extensive up to 10 cm wide patches. Lobes finely striate, rounded, flat, (3-)5-8(-10) mm wide, with wavy, often ascending margins. Lower surface usually paler than upper surface, not tomentose. Upper and lower cortex composed of a single layer of angular cells. Apothecia frequent, lecanorine, (0.5-)1-3(-4) mm across, sessile and constricted at base, sometimes slightly stipitate, with a flat to slightly convex, reddish brown disc, and a finely striate, thin but persistent thalline margin. Thalline exciple 70-150 µm wide laterally; proper exciple c. 25 µm wide, paraplectenchymatous; epithecium orange-brown to yellowish brown; hymenium colourless, 125-140 µm high, K/I+ blue; hypothecium colourless, prosoplectenchymatous. Asci 8-spored, cylindrical-clavate, the apex strongly thickened, the apical dome K/I+ pale blue, with a downwardly projecting K/I+ deep blue tubular structure. Ascospores muriform, hyaline, ellipsoid with pointed ends, (20-)25-32(-37) x (10-)13-15(-17) µm. Photobiont cyanobacterial (Nostoc, the individual cells 2-4 µm wide, arranged in long chains). Spot tests: all negative. Chemistry: without lichen substances.

Note: a mild-temperate to Mediterranean species found on mossy trees and rocks in ancient, humid woodlands of Tyrrhenian Italy. It is included in the Italian red list of epiphytic lichens as “Vulnerable” (Nascimbene & al. 2013c).

Growth form: Foliose, broad lobed

Substrata: bark

Photobiont: cyanobacteria, filamentous (e.g. Nostoc, Scytonema)

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: extremely rare

Submediterranean belt: extremely rare

Padanian area: absent

Humid submediterranean belt: very rare

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

Leif Stridvall http://www.stridvall.se/lichens/gallery/ Courtesy: Anita Stridvall

Felix Schumm; Owner: Felix Schumm

Felix Schumm; Owner: Felix Schumm

Felix Schumm; Owner: Felix Schumm

Felix Schumm; Owner: Felix Schumm

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

Herbarium: TSB (1453)
2001/11/26

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

Courtesy: Anita Stridvall

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

Courtesy: Anita Stridvall

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

Courtesy: Anita Stridvall

Felix Schumm – CC BY-SA 4.0

Image from: F. Schumm (2008) - Flechten Madeiras, der Kanaren und Azoren. Beck, OHG - ISBN: 978-3-00-023700-3

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

Courtesy: Anita Stridvall

Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder

Portugal: Madeira.

Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder

Portugal: Madeira.