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A literature survey was conducted to investigate the host and geographical distribution patterns of three    Corynosoma    species (  Acanthocephala  :   Polymorphidae  ),  viz.   C.   magdaleni   ,    C.   semerme    and    C.   strumosum   . All three species appear to be restricted to the Northern Hemisphere. Occurrence records of    C.   magdaleni    are limited to the Northern Atlantic coasts, while    C.   semerme    has a circumpolar distribution. The geographical range of    Corynosoma   strumosum    encompasses the distributions of the other two species, but also extends into warmer southern regions. Some    Corynosoma    populations are living with their definitive hosts in very isolated locations, such as in the brackish Baltic Sea or different freshwater lakes (e.g. Lake Saimaa). All three species have a heteroxenous life cycle, comprising a peracaridan intermediate host, a fish paratenic host and a mammalian definitive host. Occasionally, an acanthocephalan may enter an accidental host, from which it is unable to complete its life cycle. The host records reported here are categorised by type,  i.e.  intermediate, paratenic, definitive or accidental. While most of the definitive hosts are shared amongst the three    Corynosoma    species,    C.   strumosum    showed the broadest range of paratenic hosts, which reflects its more extensive geographical distribution. One aim of this study and extensive literature summary is to guide future sampling efforts and therewith contribute to throw more light on the on-going species and morphotype discussion for this interesting parasite species.

biodiversity data journal

Host records and geographical distribution of    Corynosoma   magdaleni   ,    C.   semerme    and    C.   strumosum    (  Acanthocephala  :   Polymorphidae  )