Bagliettoa crassiuscula (Servít) Hafellner
Syn.: Amphoridium crassum (Arnold) Servít, Bagliettoa crassa (Arnold) Cl. Roux, Thelidium crassum Arnold, Verrucaria calciseda DC. var. crassa (Arnold) Arnold, Verrucaria crassa A. Massal. 1852 non Eschw. 1833 nom.illeg., Verrucaria crassiuscula Servít
Lichenised.
Substrate: calciferous rocks
Altitudinal range: from the submediterranean/colline belt (potential vegetation: mixed deciduous forests dominated by Quercus and Carpinus) to the montane belt (potential vegetation: deciduous forests dominated by Fagus sylvatica and closed coniferous forests with Picea abies)
Note: a taxon of the B. calciseda-group with a thick, rugulose-verrucose thallus, and ellipsoid ascospores (12–18 × 6–7 μm, acc. to Servít even larger); the distribution is still insufficiently known.
France: Alpes-Maritimes; Drôme; Vaucluse; Italy: Veneto;