ABSTRACT

A peculiar bursate nematode, Zygocaulus nagoensis n. gen. and n. sp. (Trichostrongyloidea: Dictyocaulidae: Mertensinematinae), was described from an alien frog, Polypedates leucomystax (Anura: Rhacophoridae), collected on Okinawa Island, Japan. It is related to Mertensinema and Borrellostrongylus, the only hitherto known genera of Mertensinematinae, but is readily distinguished from them by having only 2 pairs of lateral rays and simple distal ends of the dorsal ray branches.

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