: Some new or little–known species of Squamarina (Stereocaulaceae, Lecanorales) from France.— Delimitation of the genus Squamarina. Detailed and illustrated description of six new species of Squamarina belonging to the group of Squamarina cartilaginea: four saxicolous–calcicolous (Squamarina calesensis Cl. Roux et Poumarat, S. clauzadei Cl. Roux et Poumarat sp. nov. (syn. S. oleosa sensu auct. non (Zahlbr.) Poelt), S. confusa Cl. Roux et Poumarat sp. nov. and S. paradoxa Cl. Roux et Poumarat sp. nov.), one saxicole–calcifuge (S. brunneola Poumarat et Cl. Roux sp. nov.), one terricolous–calcicolous (S. terricola Cl. Roux et Poumarat sp. nov.). A new species ad int. from Algeria is mentioned in an Appendix. Two new combinations are proposed, S. dufourii (Fr) Cl. Roux et Poumarat comb. nov. and S. pseudocrassa (Mattick) Cl. Roux et Poumarat comb. nov. (the latter in the Appendix), for each of which a neotype is chosen. All these species are compared with S. cartilaginea, of which a detailed and illustrated description is also given. Three new varieties are proposed (S. clauzadei var. microspora Cl. Roux et Poumarat var. nov., S. confusa var. latispora Cl. Roux et Poumarat var. nov. and S. confusa var. parvispora Cl. Roux et Poumarat var. nov.). S. oleosa, very different from S. clauzadei, does not exist in France. Key to the determination of Squamarina of France (in Esperanto and French).