Abstract
A new species of acanthocephalan, Neoechinorhynchus notemigoni, from the intestine of Notemigonus crysoleucas (Mitchill) is described. This is the 23rd species of the family Neoechinorhynchidae Van Cleave, 1919 and the 15th species of the genus Neoechinorkynchus Hamann, 1892, known from North American fish according to various authors. It is the sixth species of the genus Neoechinorhynchus which does not utilize catostomids as definitive hosts in North America.

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