Verrucaria muelleriana Servit , Vestn . Kra . Ceske Spolec . Nauk 10: 14 (1948) [1947]

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 muelleriana Servit, Vestn. Kra. Ceske Spolec. Nauk 10: 14 (1948) [1947]

Type.

[France] Salève, J. Müller (M-0193432!, holotype).

Description.

Prothallus not seen. Thallus pale brown with a violet tinge, continuous, hemi-endolithic, contiguous conspecific thalli separated by dark lines. Perithecia 0.38-0.46 mm, 3/4-immersed, leaving deep pits in the rock; ca. 30-50 perithecia/cm2. Involucrellum apical, ca. 50-60 mm thick, appressed to the exciple. Exciple ca. 0.34-0.35 mm in diam., wall black, ca. 25 mm thick. Periphysoids ca. 50-80 × 1-1.5 mm. Ascospores 0-septate, 32-41 × 12-15 mm.

Notes.

The species is morphologically close to V. depressula or may even be conspecific.