Collemopsidium foveolatum (A.L. Sm.) F. Mohr

in Mohr & al., Mycol. Res., 108: 529, 2004. Basionym: Arthopyrenia foveolata A.L. Sm. - J. Bot., London, 49: 43, 1911.
Synonyms: Arthopyrenia gyalectoides M. Knowles ex A.L. Sm.; Pyrenocollema foveolatum (A.L. Sm.) C. Mohr
Distribution: N- VG. S - Pugl (Nimis & Tretiach 1999 as C. halodytes),
Description: Thallus crustose, endosubstratic and hardly distinguishable from the substrate, forming 0.5-1 cm wide, grey-beige patches often separated by a thin raised rim. Perithecia scattered, black, 0.1-0.25 mm in diam., totally immersed in pits of the substrate, hardly visible to the naked eye as minute black dots. Involucrellum usually present, lid-like, flat to slightly convex, hardly spreading laterally; exciple dark, more or less cellular; hamathecium of branched and anastomosing pseudoparaphyses, the hymenial gel I-. Asci 8-spored, ovoid to subcylindrical, usually stalked, with two functional wall layers, K/I-, the wall thickened above, with an ocular chamber, fissitunicate, with a distinct extruded rostrum at dehiscence. Ascospores 1-septate, hyaline, oblong, one cell usually longer than the other, 14-21 x 5-9 µm. Photobiont cyanobacterial, the cells in scattered groups, sometimes absent. Spot tests: all negative. Chemistry: without lichen substances.
Note: probably this is the most common species of the genus along the Italian coasts, where it most often occurs on barnacles; in the past, it has been frequently confused with C. halodytes (e.g. all records of that species from the Trieste coast refer to C. foveolatum).
Growth form: Crustose endolithic
Substrata: rocks
Photobiont: cyanobacteria, filamentous (e.g. Nostoc, Scytonema)
Reproductive strategy: mainly sexual
Periodically submerged (e.g. in creeks)
Taxon bound to maritime-coastal situations

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: common
Dry mediterranean belt: common

pH of the substrata:

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(info)

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
Index Fungorum GBIF

Source: http://fungi.myspecies.info/all-fungi/collemopsidium-foveolatum - CC BY-NC


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_C/Textes_C3/Collemopsidium_foveolatum.htm
France, session AFL 2010 - Hérault - 34


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_C/Textes_C3/Collemopsidium_foveolatum.htm
France, session AFL 2010 - Hérault - 34


Joel Querellou - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=5&lang=en
France, Kermorvan


Joel Querellou - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=5&lang=en
France, Kermorvan


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=5&lang=en
France, Crozon


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=5&lang=en
France, Crozon


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=5&lang=en
France, Ile Longue


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=5&lang=en
France, La Fraternitè


Michel David - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=5&lang=en
France, Pointe de Kerdra


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1382&lang=en
France, saxicole Lostmarc'h


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1382&lang=en
France, saxicole Lostmarc'h


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1382&lang=en
France, saxicole Lostmarc'h


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1382&lang=en
France, saxicole Lostmarc'h


Michel David - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=876&lang=en
France, forme sur Chthamalus,Camaret


Michel David - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=876&lang=en
France, forme sur Chthamalus,Camaret


Bernard Bouffinier - Source:http://www.lichensmaritimes.org/index.php?task=fiche&lichen=874&lang=en
France, forme sur Mytilus, Kerloc'h


Bernard Bouffinier - Source:http://www.lichensmaritimes.org/index.php?task=fiche&lichen=874&lang=en
France, forme sur Mytilus, Kerloc'h


Michel David - Source:http://www.lichensmaritimes.org/index.php?task=fiche&lichen=874&lang=en
France, forme sur Mytilus, Lostmarc'h


Michel David - Source:http://www.lichensmaritimes.org/index.php?task=fiche&lichen=874&lang=en
France, forme sur Mytilus, Toulingouet


Michel David - Source:http://www.lichensmaritimes.org/index.php?task=fiche&lichen=874&lang=en
France, forme sur Mytilus, Toulingouet