Verrucaria bisagnoensis Servít

Sborn. Narodn. Mus Praze, 5, B, 9, bot. 3: 16, 1949.
Synonyms:
Distribution: N - Lig.
Description: Thallus crustose, thinly episubstratic, brown, subgelatinous when wet, of dispersed to dense granules or fleck-like, convex to flat areoles which partly coalesce into an uneven crust, often developing in small depressions of the rock. Perithecia black, in shallow pits of the rock, hemispherically projecting. Involucrellum 70-90 μm thick, hemispherical, with a rough outer surface, appressed to exciple and reaching down to base-level; exciple subglobose, 0.15-0.2 mm across, the wall brown throughout; hamathecium of periphysoids measuring 25-35 x 2-2.5 μm, interascal filaments absent; hymenial gel hemiamyloid, I+ red (I+ blue at very low concentrations of I), K/I+ blue. Asci 8-spored, clavate, I-, fissitunicate, the wall thickened above, with an ocular chamber, dehiscent by extrusion of an endotunica to form a delicate rostrum, Verrucaria-type, 70-80 x 18-27 μm. Ascospores 1-celled, hyaline, broadly ellipsoid, 18-26 x 13-15.5 μm. Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.
Note: a long-forgotten species which was resurrected by Muchnik & Breuss (2015), present also in Slovenia and Russia. The type was collected in Val Bisagno near Genova, on sandstone, but material from Slovenia and Russia is on limestone. See also Oïhnéart & al. (2018).
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Poorly known taxon in need of further study

Commonnes-rarity: (info)

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

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
INDEX FUNGORUM GBIF

Source: • Muchnik E.E., Breuss O. 2015. New and noteworthy records of Verrucariaceae (lichenised Ascomycota) from central European Russia. Herzogia, 28, 2, 2: 746-752.
A – habit of central part of thallus with fleck-like areoles and perithecia; B – detail showing sectioned perithecia; C – margins of thallus; D – detail of perithecia (Muchnik s.n., 08.06.13, LI). Scales: A, C – 500 μm, B – 200 μm, D – 100 μm.


Source: Servit, M 1949: Nove nebo mene zname druhy lisejnikove celedi Verrucariaceae. Species Verrucariacearum (Lichenes) novae vel minus cognitae. - Sbornik Narodniho Musea v Praze 5(9): 1-51. Tab.1 - Public Domain