During several field trips organized between 1996 and 2012 a total of 94 species of longhorn beetles were captured on Rtanj Mt. in the vicinity of the village of Rtanj (eastern Serbia). Most specimens were collected by hand and with an entomological net, but a certain number were collected using wine and pitfall traps as well. Several different sites were investigated, including meadows near the asphalt road, the surroundings of the Rašinac Stream, limestone slopes, and deciduous and coniferous forests. Sixty-two species are recorded for the first time for Rtanj Mt., but eight of them are also recorded for the first time in eastern Serbia: Rhagium (Rhagium) inquisitor (Linnaeus), Grammoptera (Grammoptera) abdominalis (Stephens), Stictoleptura (Stictoleptura) erythroptera (Hagenbach), Obrium cantharinum (Linnaeus), Leioderes kollari Redtenbacher, Chlorophorus (Crassifasciatus) hungaricus Seidlitz, Phytoecia (Pilemia) tigrina Mulsant, and Agapanthia (Smaragdula) viti Rapuzzi & Sama. Among the identified taxa there are rare species, including Vadonia moesiaca (K. Daniel & J. Daniel) - an endemic species in the Balkan region; some of these rare taxa are protected both nationally and internationally
