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 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 70-115 µm wide laterally; proper exciple c. 25 µm wide, paraplectenchymatous; epithecium orange-brown to yellowish brown; hymenium colourless, 125-140 µm high, I+ blue; hypothecium colourless, prosoplectenchymatous. Asci 8-spored, cylindrical-clavate, the apex thick, with a I+ blue apical dome and a I+ blue annulus projecting downwardly. Ascospores muriform, hyaline, ellipsoid with pointed ends, (20-)25-32(-37) x (10-)13-15(-17) µm. Photobiont cyanobacterial (Nostoc, the cells 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:

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Solar irradiation:

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Aridity:

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Eutrophication:

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Poleotolerance:

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Altitudinal distribution:

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Predictive model
Herbarium samples

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



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



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


LITERATURE


Asahina,Y (1932) "Raiken's solioquy on botanical science" or Notes on lichens XLVI. On the allied species of Leptogium tremelloides from Japan. Journal of Japanese Botany\J. Jap. Bot.

Asahina,Y (1936) Leptogium tremelloides und verwandte Arten aus Japan. Journal of Japanese Botany\J. Jap. Bot.

Quarterman, E. (1950) Major plant communities of Tennessee cedar glades. Ecology

Dodge, CW (1964) Some Lichens of Tropical Africa. IV. Dermatocarpaceae to Pertusariaceae.

Jorgensen, PM/ James, PW (1983) Studies on some Leptogium species of western Europe. Lichenologist

Osorio, HS/ Fleig, M (1994) Contribution to the lichen flora of Brazil. XXXI. Lichens from Julio de Castilhos, Rio Grande do Sul State [Contribucion a la flora liquenica de Brasil. XXXI. Liquenes de Julio de Castilhos, Estado de Rio Grande do Sul]. Comunicaciones Botanicas del Museo de Historia Natural de Montevideo https://nhm2.uio.no/botanisk/lav/RLL/PDF1/R13936.pdf

Osorio, HS (1995) Contributions to the lichen flora of Uruguay. XXVII. Taxonomic notes. Flechten Follmann. Contributions to lichenology in Honour of Gerhard Follmann https://nhm2.uio.no/botanisk/lav/RLL/PDF/1995_Osorio_Contribution Lichen Flora Uruguay XXVII_Taxonomic notes.pdf

Bjelland, T (2001) Comparative studies of the distribution and ecology of some oceanic species in the genus Leptogium (Lecanorales, Ascomycotina) in Norway. Nova Hedwigia

Etayo, J (2002) Aportacion al Conocimiento de los Hongos Liquenicolas de Colombia.

Noske, NM/ Sipman, HJM (2004) Cryptogams of the Reserva Biologica San Francisco (Province Zamora-Chinchipe, Southern Ecuador) II. Lichens. Cryptogamie, Mycologie

P. M. Jorgensen (2009) Proposal 1896: to conserve the name Lichen lichenoides (Leptogium lichenoides) against Lichen tremelloides and L. tremella (lichenized Ascomycota). Mycotaxon

P. M. Jorgensen (2009) Proposal to conserve the name Lichen lichenoides (Leptogium lichenoides) against Lichen tremelloides and L. tremella (lichenized Ascomycota). Taxon https://nhm2.uio.no/botanisk/lav/RLL/PDF/R30978.pdf