Verrucaria cinereorufa Schaer., Lich. Helv. Spicil. 7, 338, 1836

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 cinereorufa Schaer., Lich. Helv. Spicil. 7, 338, 1836

Type.

[France,] Saléve (H-NYL3038!, UPS!, probably syntypes).

Description.

Prothallus not seen. Thallus pale greyish-brown, thinly epilithic, continuous. Perithecia 0.38-0.61 mm, 1/2-3/4-immersed, leaving fairly deep to deep pits in the rock; ca. 30-60 perithecia/cm2. Ostiole plane to depressed, ca. 20-60 mm wide. Involucrellum covering half of the exciple, ca. 70-180 mm thick. Exciple 0.23-0.38 mm in diam., wall black. Periphysoids long, ca. 1.5-3 mm thick. Ascospores 0-septate, 30-38 × 12-15 mm.

Notes.

The species may be related to Verrucaria depressula Servít, but has larger perithecia and thicker involucrellum. The species was erroneously reported by Pykälä (2010a) from Finland.