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ARTICLES

Vol. 15 No. 1 (2026): Rev. Arg. Parasitol.

New parasite-host associations in octodontoid rodents (Hystricomorpha) from Argentina, through the examination of helminth and mammal collections

Submitted
October 7, 2025
Published
2026-04-25

Abstract

Through the examination of material deposited in helminthological and mammal collections, we evidenced several new host- and geographic records of parasites (Nematoda) of Argentinean octodontoid rodents. We examined 39 helminth sets housed in the Helminthological Collection of the Museo de La Plata (La Plata); and 14 individual rodents housed in the Colección Nacional de Mamíferos (Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”, Buenos Aires) were examined for parasites. The following associations are reported as new: Paraspidodera uncinata (Aspidoderidae) in Aconaemys porteri and Octodon ricardojeda (Octodontidae) from Neuquén, in Ctenomys bergi and Ctenomys pundti from Córdoba, and in Ctenomys spp. from Corrientes and from Jujuy. Helminthoxys gigantea (Oxyuridae) in O. ricardojeda and in Octodontomys gliroides (Octodontidae) from Jujuy. Trichuris cf. pampeana (Trichuridae) in C. pundti. Trichuris spp. in O. ricardojeda, O. gliroides, C. bergi and Ctenomys sp. from Jujuy. Ischilinema baldoi (Viannaiidae) in Ctenomys sp. From Catamarca. Pudica ctenomydis (Heligmonellidae) in C. pundti. Pudica spp. in Ctenomys sp. from Corrientes and in O. ricardojeda. Graphidioides taglei (Trichostrongylidae) in A. porteri; Trichostrongylus sp. (Trichostrongylidae) in Ctenomys sp. from Jujuy; and Ancylostoma cf. caninum (Ancylostomatidae) in C. pundti. These are the first records of P. uncinata in representatives of the Octodontidae (genera Octodon and Aconaemys). The host range of G. taglei is extended to a second genus (Aconaemys) in the Octodontidae, and that of H. gigantea to a third genus (Octodontomys) in the same family. Pudica sp. in Ctenomys sp. from Corrientes, Pudica sp. 2 in O. ricardojeda, and Trichuris spp. in O. ricardojeda and Ctenomys spp. from Jujuy could represent new taxa still undescribed. Associations previously reported such as G. taglei-Octodon bridgesii and H. gigantea- Octodon bridgesii in Argentinean localities are rectified, due to identification mistakes and/or changes in the taxonomy of the individual hosts.

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