Rhadinorhynchus mariserpentis

Rhadinorhynchus mariserpentis is a species of parasitic thorny-headed worm within the family Rhadinorhynchidae. The species is a endoparasite of Regalecus russeli, with the type locality coming from an intestine of an individual collected in the Sea of Japan off the coasts of northern Kyushu.