Abstract
A review of Acanthocephala of America north of Mexico is presented with an updated key to species. A. confraterna is considered a junior synonym of A. terminalis, thus reducing the number of known species in this region from five to four. New state and country records are presented. The genus Acanthocephala Laporte currently is represented in America north of Mexico by five species: Acanthocephala (Acanthocephala) declivis (Say), A. (Metapodiessa) confraterna (Uhler), A. (M.) femorata (Fabricius), A.(M.) terminalis (Dallas), and A. (M.) thomasi (Uhler) (Froeschner 1988). A. terminalis has the widest distribution, including much of the Midwest. A. confraterna has been reported from the Carolinas south to Florida and west to Texas and A. thomasi fromTexas to California. A. declivis and A. femorata are primarily southern but have been reported as far north as Missouri (A. declivis) and Oklahoma, Kansas, and Missouri (A. femorata) (Froeschner 1988).