Agonimia vouauxii (B. de Lesd.) M. Brand & P. Diederich
in Sérusiaux & al., Lejeunia, n.s., 162: 13, 1999.. Basionym: Polyblastia vouauxii B. de Lesd. - Recherch. Lich. Dunkerque: 259, 1910.
Distribution: C - Tosc (Herb. von Brackel 361), Abr (Nascimbene & al. 2021).
Description: Thallus crustose, episubstratic, grey-green to brownish, papillate, when well-developed consisting of 60-200 μm wide warts. Perithecia black, slightly glossy, half-immersed, subspherical to slightly obpyriform, 0.12-0.23 mm across (in section). Exciple distinctly 2-layered, the outer layer dark brown, the inner layer pale brown to colourless; involucrellum absent; hymenial hemiamyloid; hamathecium of periphyses and periphysoids, interascal filaments absent. Asci 2-spored, clavate, thin-walled, fissitunicate, not or very weakly thickened above, I-, K/I-. Ascospores muriform, hyaline, ellipsoid, (40-)60-72(-85) x 15-24(-31) μm. Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.
Note: a taxon described from maritime Northern France, where it colonises organic waste like paper, leather, etc.; elsewhere it was reported from soil rich in calcium in open vegetation types.
Growth form: Crustose
Substrata: soil, terricolous mosses, and plant debris
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Most common in areas with a humid-warm climate (e.g. most of Tyrrenian Italy)