1. Molecular phylogeny of Congeneric monogenean parasites (Dactylogyrus): a case of intrahost speciation

2. These included the acanthocephalan Echinorhynchus gadi previously unreported from herring in the northwestern Atlantic and the monogenean Gyrodactyloides andriaschewski herein described from herring for the first time.

3. Known parasites of this species include the tapeworms Grillotia smaris-gora, G. angeli, and Christianella minuta, the fluke Pseudocotyle squatinae, the monogenean Leptocotyle minor, and the isopod Aega rosacea.