Gyalecta jenensis var. macrospora Vězda

Folia Geobot. Phytotax., 4, 4: 443, 1969
Synonyms: Secoliga macrospora (Vězda) P.F. Cannon
Distribution:
Description: Thallus crustose, very thinly episubstratic, pale grey-green, continuous to nodular, sometimes poorly evident and developing on cyanobacterial patinas. Apothecia usually numerous, sessile, round, 0.5-1 mm across, with a pale to deep orange, at first pore-like, then concave, often shiny and translucent (when wet) disc, and a whitish, entire to crenate or finally radially cracked proper margin. Proper exciple brownish yellow to pale orange in outer part, colourless within, with very conspicuous white crystalline nodose deposits on the outer surface; hymenium colourless or yellowish in lower part, inspersed with oil droplets; paraphyses coherent, clearly longer than the asci, 1.5-2 µm thick, the apical cells hardly swollen; hypothecium colourless. Asci 8-spored, thin-walled, lacking an apical apparatus or tholus, K/I+ blue. with uniseriate or partly biseriate spores. Ascospores muriform, hyaline, ellipsoid to broadly fusiform, (27-)30-38(-40) x 12-16 µm. Photobiont trentepohlioid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.
Note: this taxon, likely representing a good species (see Cannon & al. 2024), was described from maritime Western Europe, on siliceous rocks. The record from the alpine belt of the Austrian Alps is dubious, those from the French Maritime Alps are likely to be correct (see Nimis & al. 2018). The relations with G. schisticola, with smaller spores, still await elucidation. To be looked for, especially in Tyrrhenian Italy.
Growth form: Crustose
Substrata: rocks
Photobiont: Trentepohlia
Reproductive strategy: mainly sexual
Most common in areas with a humid-warm climate (e.g. most of Tyrrenian Italy)
Taxon bound to maritime-coastal situations

pH of the substrata:

12345

(info)

Solar irradiation:

12345

(info)

Aridity:

12345

(info)

Eutrophication:

12345

(info)

Poleotolerance:

0123

(info)

Altitudinal distribution:

123456

(info)


Predictive model

Alain Gerault - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=923&lang=en
France, Pointe de Pen-Hir


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=781&lang=en
France, Landévennec


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=781&lang=en
France, Landévennec


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=781&lang=en
France, Landévennec


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=781&lang=en
France, Le Toulinguet


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=781&lang=en
France, Le Toulinguet


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=781&lang=en
France, Landévennec


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=923&lang=en
France, Saint Mathieu


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=923&lang=en
France, Saint Mathieu


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=923&lang=en
France, Saint Mathieu


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=923&lang=en
France, Saint Mathieu


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=923&lang=en
France, Saint Mathieu


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=923&lang=en
France, Saint Mathieu


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=923&lang=en
France, Saint Mathieu


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=923&lang=en
France, Saint Mathieu