Verrucaria pustulifera Servit , Stud. Bot. Cech . 11(3): 120, 1950

Pykaelae, Juha, Kantelinen, Annina & Myllys, Leena, 2020, Taxonomy of Verrucaria species characterised by large spores, perithecia leaving pits in the rock and a pale thin thallus in Finland, MycoKeys 72, pp. 43-92 : 43

Verrucaria pustulifera Servit, Stud. Bot. Cech. 11(3): 120, 1950

Type.

Slovakia, in valle fl. Hnilec, pr. R. Ztratená, 800 m alt., calc., 1933, Suza (PRM 858074!, syntype).

Description.

Prothallus not seen. Thallus grey, endolithic to semi-endolithic. Perithecia 0.25-0.33 mm, 3/4-immersed, leaving deep pits in the rock, usually surrounded by a thalline collar or is covered by a thin thalline layer except for the apex. Ostiole pale, plane, ca. 20-50 mm wide. Involucrellum covering half of the exciple, ca. 50-70 mm thick, diverging from the exciple. Exciple ca. 0.3-0.33 mm in diam., wall pale brown. Periphysoids ca. 25-30 × 2-2.5 mm. Ascospores 0-septate, 27-38 × 12-15 mm.

Notes.

Verrucaria pustulifera differs from V. subjunctiva in a pale brown exciple and shorter periphysoids. The involucrellum is also smaller than usually in V. subjunctiva . Verrucaria kuusamoensis has smaller spores.