Gyrocollema rupestrinum (Zahlbr.) Henssen

Syst. Ascomycetum, 5: 131, 1986. Basionym: Ginzbergerella rupestrina Zahlbr. - Hedwigia, 71: 208-209, 1931.
Distribution: C - Abr (Schultz 2014).
Description: Thallus endolithic, continuous, homoiomerous, poorly evident, appearing as a subfarinose, grey patch. Apothecia circular in outline, at first immersed, then subsessile, c. 0.5 mm across, with a deeply urceolate, at first brown but finally black disc, and a distinct thalline margin (sometimes appearing perithecioid when dry). Thalline exciple ecorticate, reddish brown in upper and outer parts; proper exciple poorly developed; epithecium brownish, K-; hymenium colourless, 90-100 µm high; paraphyses coherent, thread-like, mostly simple. Asci (6-)8-spored, sublinear-elongate, 70-79 x 23 µm. Ascospores 1-celled, hyaline (some of them turning pale brown at maturity), globose to ovoid, 9.5-14 x 7.7-13 µm, thin-walled. Photobiont cyanobacterial (Scytonema). Chemistry: without lichen substances.
Note: this very poorly understood species is known only from the type material, collected by Ginzberger in the Gran Sasso Massif (Central Apennines) on calcareous rocks above 2400 m.
Growth form: Crustose
Substrata: rocks
Photobiont: cyanobacteria, filamentous (e.g. Nostoc, Scytonema)
Reproductive strategy: mainly sexual
Poorly known taxon in need of further study

Commonnes-rarity: (info)

Alpine belt: extremely rare
Subalpine belt: absent
Oromediterranean belt: absent
Montane belt: absent
Submediterranean belt: absent
Padanian area: absent
Humid submediterranean belt: absent
Humid mediterranean belt: absent
Dry mediterranean belt: absent

pH of the substrata:


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Altitudinal distribution:


Predictive model