Verrucaria bulgarica Szatala
Magy. Bot. Lapok, 29: 60, 1930.
Synonyms:
Distribution:
Description: Thallus crustose, thinly episubstratic, 50-90 µm thick, brown, continuous to weakly rimose-areolate, the areoles flat, 0.15-0.35 mm wide. Cortex poorly differentiated, brown-pigmented; algal cells arranged in closely packed vertical series; medulla very thin, not forming a black basal layer. Perithecia abundant, black, small, at first semi-immersed in the centre of the areoles later forming 60-150 µm wide hemispherical projections, not covered by a thalline layer. Involucrellum 15-35 µm thick, appressed to exciple except at base but not spreading, reaching to base-level; exciple colourless to pale brown in lower part, sooty black in upper part; hamathecium of periphysoids, interascal filaments absent; hymenial gel hemiamyloid, I+ red (I+ blue at very low concentrations of I), K/I+ blue. Asci 8-spored, broadly clavate, I-, fissitunicate, the wall thickened above, with an ocular chamber, dehiscent by extrusion of an endotunica to form a delicate rostrum, Verrucaria-type, 25-35 x 14-18 μm. Ascospores 1-celled, hyaline, ellipsoid to broadly ellipsoid, (7-)8-10(-11) x 4.5-5(-5.5) µm, (1.5-)1.6-2 (-2.2) times as long as wide, without a distinct perispore. Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.Note: a poorly known, more or less calcicolous species also found on mortar and bricks in rather shaded situations, described from Bulgaria and later reported from Great Britain, France and the South Orkney Islands. For further information see Shivarov & Lőkös (2015), Orange & al. (2023) and Roux & Coll. (2025). To be looked for in Italy.
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Poorly known taxon in need of further study
Predictive model
Source: Shivarov V.V., Lőkös L. 2015. New records and rare species of pyrenocarpous lichen-forming fungi from Bulgaria. Studia Bot. Hung., 46, 2: 111-118.
Verrucaria bulgarica, areoles and prominent perithecia (BP 3) (scale = 200 μm).
Source: Shivarov V.V., Lőkös L. 2015. New records and rare species of pyrenocarpous lichen-forming fungi from Bulgaria. Studia Bot. Hung., 46, 2: 111-118.
Verrucaria
bulgarica, vertical section of smaller perithecium (BP 3) (scale = 20 μm).
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Poorly known taxon in need of further study
Predictive model
Source: Shivarov V.V., Lőkös L. 2015. New records and rare species of pyrenocarpous lichen-forming fungi from Bulgaria. Studia Bot. Hung., 46, 2: 111-118.
Verrucaria bulgarica, areoles and prominent perithecia (BP 3) (scale = 200 μm).
