Taxonomy of Verrucaria species characterised by large spores, perithecia leaving pits in the rock and a pale thin thallus in Finland Author Pykaelae, Juha Biodiversity Centre, Finnish Environment Institute, Latokartanonkaari 11, 00790 Helsinki, Finland https://orcid.org/0000-0002-7566-9310 juha.pykala@ymparisto.fi Author Kantelinen, Annina Botanical Museum, Finnish Museum of Natural History, P. O. Box 7, FI- 00014 University of Helsinki, Finland Author Myllys, Leena Botanical Museum, Finnish Museum of Natural History, P. O. Box 7, FI- 00014 University of Helsinki, Finland https://orcid.org/0000-0002-9566-9473 text MycoKeys 2020 72 43 92 http://dx.doi.org/10.3897/mycokeys.72.56223 journal article http://dx.doi.org/10.3897/mycokeys.72.56223 1314-4049-72-43 5243D130A7EF55F3856E1E3722F204D5 Verrucaria cryptica (Arnold) J. Steiner, nom. inval., Verh. zool.-bot. Ges. Wien 61: 41, 1911 Amphoridium crypticum Arnold, nom. inval., Lich. Frank. Jura 257, 1885. Basionym. Type. [Italy] An Kalksteinen einer Schutthalde unterhalb der Kalkwaende an der Suedseite des Latemar -Gebirges oberhalb Predazzo, Suedtirol , 21. Aug. 1883, Arnold (H-NYL 7009!, H!, UPS-L-169663!, isotypes). Description. Prothallus absent. Thallus endolithic, grey. Perithecia 0.15-0.39 mm, (3/4-)1-immersed in rock, leaving deep pits in the rock. Involucrellum absent or possibly in some perithecia, small apical involucrellum. Exciple ca. 0.25-0.40 mm in diam., apex thickened, wall black, ca. 30 mm thick. Periphysoids ca. 50-70 x 2 mm, branched-anastomosing. Ascospores 0-septate, 25-30(-32) x (12-)13-16(-17) mm, perispore 1(-1.5) mm thick, persistent. Notes. The species is rather similar to V. foveolata , but the halonate perispore seems to be persistent. This species seems not to have been validly published as the species description is missing from Arnold (1885) and Steiner (1911) .