Verrucaria mastoidea (A. Massal.) Trevis., Conspect. Verruc. p. 8, 1860

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 mastoidea (A. Massal.) Trevis., Conspect. Verruc. p. 8, 1860

Amphoridium mastoideum A. Massal., Symmict. Lich. 82, 1855. Basionym.

Type.

[Italy,] in op. Tregnago - Viacara (VER!, syntype).

Description.

Prothallus not seen. Thallus pale brownish-grey, continuous to rimose. Perithecia 0.12-0.21 mm, 3/4-immersed in thallus. Involucrellum apical, ca. 40-50 mm thick, appressed to the exciple. Exciple 0.27-0.33 mm in diam., wall black. Periphysoids ca. 40-45 × 2 mm. Ascospores 0-septate, 28-31 × 12-15 mm.

Notes.

The syntype specimen studied is probably conspecific with V. viridula .