Description of three new European cryptic species of Gyrodactylus Nordmann, 1832 supported by nuclear and mitochondrial phylogenetic characterization

Three previously undescribed species of wageneri group of Gyrodactylus Nordmann, 1832 (subgenus Limnonephrotus, Gyrodactylidae, Monogenoidea) related to G. lavareti Malmberg, 1957 are described here. G. pomeraniae sp. nov. was found on roach (Rutilus rutilus) in Poland and Belgium, G. ouluensis sp. nov. on roach in Finland and G. salvelini sp. nov. on Arctic charr (Salvelinus alpinus) in the Lake Inari, Finland. A molecular redescription of G. lavareti on Coregonus lavaretus is also presented, and G. bliccensis on Alburnus alburnus from river Morava, Czech Republic is included in the phylogenetic analysis. In addition, a hybrid clone of maternal G. pomeraniae sp. nov. and paternal G. lavareti found on farmed rainbow trout (Oncorhynchus mykiss) is characterized. The molecular species description was based on the complete CO1 gene of the mitochondrial DNA, and on phylogenetic comparison of the internal transcribed spacer segment (ITS1-5.8S rDNA-ITS2) of nuclear ribosomal DNA. The species hosted by cyprinids were basal in the phylogeny rooted by numerous relatives of wageneri-species group.