Digenea of the fish, Macrourus holotrachys [Gadiformes, Macrouridae] from the North Scotia Ridge, sub-Antarctic

Four digenean species were found in fish of the species Macrourus holotrachys caught at the North Scotia Ridge, sub-Antarctic. Gibsonia hastata Gaevskaya et Rodyuk, 1988 and Lepidapedon lepidum Gaevskaya et Rodyuk, 1988 are redescribed and figured based on new material and reexaminations of the type-specimens. L. lepidum possesses uroproct and therefore is transferred into the genus Pąralepidapedon. Gonocerca phycidis Manter, 1925 and Lecithochirium sp. (probably unknown species) are briefly described and figured. M. holotrachys is a new host for all these parasites.