Resurrection of Diplostomum numericum Niewiadomska, 1988 (Digenea, Diplostomatoidea: Diplostomidae) Based on Novel Molecular Data from the Type-Host

Diplostomum is a taxonomically problematic genus of trematodes, with many members harmful at the metacercarial stage to fish in aquaculture. We found metacercariae eye vitreous humor rudd, Scardinius erythrophthalmus; bleak, Alburnus alburnus; and roach, Rutilus rutilus, Karelia (Russia) identified them as numericum based on combination morphological ecological data. Previously, D. was thought be conspecific gavium. However, our phylogenetic analysis sequences cox1 mitochondrial DNA gene did not support this hypothesis. demonstrated conspecificity larval trematode sp. Lineage 3 Blasco-Costa et al. (2014) from European salmonid cyprinid fishes. Therefore, we resurrected species numericum. Finally, hypothesized that was, fact, colymbi latter distinct gavium sensu stricto.