Verrucaria caesiopsila Anzi, Comm. Soc. Critt. Ital. 2(1): 23, 1864

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 caesiopsila Anzi, Comm. Soc. Critt. Ital. 2(1): 23, 1864

Type.

[Switzerland] ad saxa dolomitica in alpe Camsciano sopra Poschiavo, Anzi nro. 364 (S-L140!, syntype).

Description.

Prothallus not seen. Thallus inconspicuous, endolithic. Perithecia 0.15-0.25 mm, 3/4-1-immersed, leaving deep pits in the rock. Involucrellum absent. Exciple ca. 0.25-0.3 mm in diam., wall black. Periphysoids ca. 30-40 × 2 mm. Ascospores 0-septate, 17-23 × 11-12(-14) mm.

Notes.

The species differs from V. devergens , V. foveolata and other species treated in the Taxonomy section in smaller spores.