Northern Pikeminnow

Ptychocheilus oregonensis (Richardson 1836)

are parasitized by

• Global Biotic Interactions: Diplostomum spathaceum (Rudolphi 1819) Olsson 1876
• Global Biotic Interactions: Dactylogyrus tridactylus Monaco & Mizelle 1955
• Global Biotic Interactions: Paradilepis simoni Rausch 1949
• Global Biotic Interactions: Neascus ptychocheilus
• Global Biotic Interactions: Cercaria ptychocheilus
• Global Biotic Interactions: Multivitellina idahoensis Schell 1974
• Global Biotic Interactions: Dactylogyrus columbiensis Monaco & Mizelle 1955
• Global Biotic Interactions: Tylodelphys scheuringi (Hughes 1929) Dubois 1938
• Global Biotic Interactions: Eubothrium tulipai Ching & Andersen 1983
• Global Biotic Interactions: Eubothrium tulipai Ching & Andersen 1983
• Global Biotic Interactions: Edlintonia ptychocheila Mackiewicz 1970
• Global Biotic Interactions: Rhabdochona pellucida
• Global Biotic Interactions: Palaeorchis problematicus
• Global Biotic Interactions: Eubothrium salvelini (Schrank 1790) Nybelin 1922
• Global Biotic Interactions: Raphidascaris acus
• Global Biotic Interactions: Ichthyocotylurus platycephalus (Creplin 1825) Odening 1969
• Global Biotic Interactions: Ligula intestinalis (Linnaeus 1758) Gmelin 1790
• Global Biotic Interactions: Apophallus donicus (Skrjabin & Lindtrop 1919)
• Global Biotic Interactions: Posthodiplostomum minimum (MacCallum 1921) Dubois 1936
• Global Biotic Interactions: Allocreadium lobatum Wallin 1909
• Global Biotic Interactions: Schyzocotyle acheilognathi (Yamaguti 1934) Brabec, Waeschenbach, Scholz & Lit (Asian fish tapeworm)
• Global Biotic Interactions: Proteocephalus torulosus (Batsch 1786)
• Global Biotic Interactions: Diplostomum baeri Dubois 1937
• Global Biotic Interactions: Ligula intestinalis (Linnaeus 1758) Gmelin 1790
• Global Biotic Interactions: Neoechinorhynchus (Neoechinorhynchus) salmonis Ching 1984
• Global Biotic Interactions: Neoechinorhynchus saginatus Van Cleave & Bangham 1949
• Global Biotic Interactions: Nezpercella lewisi Schell 1974
• Global Biotic Interactions: Neoechinorhynchus (Neoechinorhynchus) rutili (Müller 1780)
• Global Biotic Interactions: Neoechinorhynchus (Neoechinorhynchus) cristatus Lynch 1936