Abstract Background The systematic of several marine diphyllobothriid tapeworms of pinnipeds has been revised in recent years. However. 20 species of Diphyllobothrium from phocids and otariids are still recognized as incertae sedis. We describe a new species of Diphyllobothrium from the intestine of California sea lions Zalophus californianus (Lesson) (type-host) and South American se... https://www.bekindtopets.com/