Verrucaria schindleri Servít
Věstn. Král. České Společ. Nauk, Třída Math.-Přírod., 12: 3, 1937 (1936).
Synonyms:
Distribution:
Description: Thallus crustose, thinly episubstratic, up to c. 0.2 mm thick, grey-white, finely rimose-areolate, without a distinct prothallus, the areoles angular, flat, 0.2-0.4 mm wide, minutely roughened to subfarinose. Upper cortex and epinecral layer hardly discernible; algal layer irregular, up to 200 µm thick, densely inspersed with substrate crystals, especially in lower part; medulla thin, chalky white. Perithecia black, semi-immersed, hemispherically projecting. Involucrellum extending halfway to 2/3 of the perithecium, appressed to exciple, laterally 50-70 µm thick; exciple subglobose, 0.25-0.4 mm across, the wall black throughout, 20-25 µm thick; hamathecium of 35-45 µm long, thin, sparingly branched periphysoids, 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, 70-75 x 20-25 µm. Ascospores 1-celled, hyaline, ellipsoid, 19-25 x 9-12 µm. Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.Note: on calcareous stones and boulders in rather humid situations; rather rare, but perhaps overlooked throughout Central Europe, with several scattered records from the Alps (Nimis & al. 2018), from the lowlands to treeline; also known from North America. For further details see Breuss (2007) and Oïhnéart & al. (2018). To be looked for in Italy.
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Predictive model
Source: Oïhnéart M., Clerc P. & Breuss O. (2018) Herzogia 31(1): 209-218 New and interesting species of the lichen genus Verrucaria (Verrucariaceae, Ascomycota) for Switzerland and France.
Verrucaria schindleri, thallus with
perithecia. Specimen: J. Rome 05.1889. Scale length: 900 µm
Source: Servít M. 1950b. The new lichens of the Pyrenocarpae-group III. Studia Bot. Cechoslov. 11, (1-2): 7-41.
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Predictive model
Source: Oïhnéart M., Clerc P. & Breuss O. (2018) Herzogia 31(1): 209-218 New and interesting species of the lichen genus Verrucaria (Verrucariaceae, Ascomycota) for Switzerland and France.
Verrucaria schindleri, thallus with perithecia. Specimen: J. Rome 05.1889. Scale length: 900 µm
