In this study, researchers described the previously little-known flower beetle Protaetia (Potosia) jelineki from north-eastern Turkey. They provided detailed descriptions and illustrations of the beetle's larvae and pupae, as well as information on the variation seen in the adult population. The researchers also discussed the identity of a previously known syntype, and introduced a new character for diagnostic purposes. The natural history of P. jelineki was also documented, including its association with flowering plants and activity periods. This study provides valuable contributions to the taxonomic knowledge of P. jelineki.