First record of the alien leech Myzobdella lugubris leidy, 1851 (Hirudinea, Piscicolidae) in the Palearctic

In this study, we report the occurrence of the Nearctic leech Myzobdella lugubris in a brackish water body of the Riserva Naturale dello Stato “Le Cesine” (Apulia, Italy). Two specimens of the species were collected in October 2016 from the neck and the forelimbs of a European pond turtle, Emys orbicularis hellenica, and identified both based on morphology and molecular sequence data. In its native range, M. lugubris is known to be a host and vector of bacteria and viruses, among which some serious fish pathogens. In light of the possible noxious ecological effects exerted through pathogen spillover on autochthonous vertebrates, the distribution of the species and its possible role as a vector of pathogens in the invaded area should be urgently monitored.