ABSTRACT: According to the International Code of Zoological Nomenclature, the identification of the separately printed copies, that the editors of scientific journals have provided to the authors, can affect the publication dates of new taxa proposed therein. For this reason, a search was conducted for the separates distributed by the Società Italiana di Scienze Naturali to the authors of the journal Atti in the period 1859‐1900. Within the 850 papers published in Atti (the proceedings of the Society), separate copies of 510 works were identified, representing 60% of the total. A more detailed analysis is here applied to the papers published by Tommaso Salvadori in this journal, all from the period 1864‐1869. The dates used historically for the taxa he introduced in these works is not all accurate and new evidence allows the antedating or postdating of some of them.
