Edmondsacanthus blairi n. gen., n. sp. (Acanthocephala: Rhadinorhynchidae) is described from the intestine of the rainbow fish Melanotaenia splendida (Peters, 1866) from the Alice River, Queensland, Australia. The new genus is characterized by its trunk spination, spines on both dorsal and ventral surfaces, and proboscis armature, 11–12 rows of 11 hooks.
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