Thirty-three tree swallows, Iridoprocne bicolor, and 5 violet-green swallows, Tachycineta thalass... more Thirty-three tree swallows, Iridoprocne bicolor, and 5 violet-green swallows, Tachycineta thalassina, from the eastern slope of the Rocky Mountains of northern Colorado were examined for helminths. Six species were found: Diplotriaena obtusa, Acuaria coloradensis n. sp. (Nematoda); Vitta magniuncinata, Angularella audubonensis (Cestoda); Plagiorchis maculosus (Trematoda); Mediorhynchus papillosus (Acanthocephala). The new species is most similar to A. multispinosa Perez Vigueras, 1937, but has 11 pairs of anal papillae and spicules measuring 125 micron and 140 micron.
Thirty-three tree swallows, Iridoprocne bicolor, and 5 violet-green swallows, Tachycineta thalass... more Thirty-three tree swallows, Iridoprocne bicolor, and 5 violet-green swallows, Tachycineta thalassina, from the eastern slope of the Rocky Mountains of northern Colorado were examined for helminths. Six species were found: Diplotriaena obtusa, Acuaria coloradensis n. sp. (Nematoda); Vitta magniuncinata, Angularella audubonensis (Cestoda); Plagiorchis maculosus (Trematoda); Mediorhynchus papillosus (Acanthocephala). The new species is most similar to A. multispinosa Perez Vigueras, 1937, but has 11 pairs of anal papillae and spicules measuring 125 micron and 140 micron.
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