Four New Species of Acanthocephalans from Birds in Vietnam

Abstract During November 2000, a collection of acanthocephalans from 6 species of birds in Quang Ninh Province, Vietnam, included 4 new species. The new taxa described included 1 in Archiacanthocephala (Gigantorhynchida: Gigantorhynchidae): Mediorhynchus lanius n. sp. from Lanius schach Linnaeus (long-tailed shrike) and 3 in Palaeacanthocephala (Polymorphida: Plagiorhynchidae): Plagiorhynchus (Prosthorhynchus) digiticephalus n. sp. from Porzana fusca Linnaeus (ruddy-breasted crake), Plagiorhynchus (Prosthorhynchus) megareceptaclis n. sp. from Gallinago gallinago Linnaeus (common snipe) and Myophonus coeruleus (Scopoli) (whistling thrush), and Porrorchis tyto n. sp. from Gorsachius melanolophus Raffles (Malayan night-heron) and Tyto sp. (barn owl). Comparisons with related taxa were made, and host relationships were discussed where applicable.

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