Abstract: The author describes the new species Tarzetta pusilla Harmaja (Pezizales) and makes the new combination Tarzetta spurcata (Pers. ) Harmaja as he considers Peziza spurcata Pers. distinct from T. catinus (Pers.) Korf & Rogers. The apparently only existing original specimen of P. spurcata is nominated as the neotype. The two Tarzetta species treated in the paper differ from the rest of the species of the genus through their entangled paraphyses, which possess branches and proliferations, especially at the tips which are mostly enlarged and profusely notched with branchlets, often to such a degree that they are in fact deformed. T. pusilla, T. spurcata and T. catinus differ from each other on the basis of characters of of the apothecium, spores, paraphyses. and anatomy. Differences between these three species may also lie in the habitat ecology and distribution. T. spurcata is reported from Finland for the first time, and the seven specimens representing this species among the Finnish Tarzetta material are listed, all the collecting localities lying in the southernmost part of the country.