Pequena contribuição ao estudo da fauna helminthologica da Argentina: (Nematoda)

Two new species of Nippostrongylinae (Nematoda: Trichostrongylina: Heligmonellidae) from the grey leaf-eared mouseGraomys griseoflavus(Sigmodontinae) in Argentina

“…These species are H. argentinus (Freitas, Lent & Almeida, 1937) The specimens from G. griseoflavus differ from the above mentioned species by rays 2 being well-deve loped and of equivalent size to rays 3. In addition, they differ from H. argentinus, H. echalieri and H. musculi by the number of ridges of the synlophe (24-25 vs.19-22).…”

Paleoparasitological study of rodent coprolites from “Los Altares” paleontological site, Patagonia, Argentina

“…Coprolites belonged to levels 1, 2, and 4, and level 12 was negative for parasites. Eggs of nematodes were identified as follows: 10 eggs of Heteroxynema (Cavioxyura) viscaciae Sutton and Hugot 1988 (Nematoda: Oxyuridae) and 16 eggs of an unidentified oxyurid (tentatively attributed to Helminthoxys Freitas et al, 1937). With respect to the anoplocephalids (Cestoda: Anoplocephalidae), eggs of 3 morphotypes were recognized from samples, 47 with features attributed to genus Monoecocestus Beddard 1914 or to Andrya Railliet 1893 (named anoplocephalid morphotype 1), 33 eggs of another unidentified anoplocephalid (named anoplocephalid morphotype 2), and 1 egg identified as Monoecocestus sp (named anoplocephalid morphotype 3).…”

“…The genus Helminthoxys includes species parasites of caviomorph rodents. The type-species, Helminthoxys caudatus Freitas et al, 1937 has been reported from the caviid M. australis in Argentina (Freitas et al, 1937); Helminthoxys velizy is specific to the chinchillid Lagidium peruanum (Bolivia and Peru), Helminthoxys abrocomae to the Octodontoidea, including Helminthoxys freitasi from Trichomys aperoides (Brazil) and Helminthoxys gigantea to Octodon degus (Chile) and to Octodon bridgesi (Argentina) (Sutton and Hugot, 1993). H. abrocomae was also recovered from Abrocoma cinerea (Thomas) (Rodentia: Caviomorpha) collected from the Andes of Bolivia (Hugot and Gardner, 2000).…”

Mazzaneman. gen. andMazzanema fortuitan. comb. forLongistriata fortuitaFreitas, Lent, and Almeida, 1937 (Nematoda: Heligmonellidae), a Parasite of the Marsh RatHolochilus chacarius(Rodentia: Cricetidae) from Northern Argentina

“…The finding, in several hosts necropsied, of specimens corresponding to this species as described by Freitas et al (1937) allowed its redescription and a discussion on its taxonomic position. As a result, the new genus Mazzanema n. gen. and the new combination Mazzanema fortuita n. comb.…”

“…Mazza sent some specimens of the marsh rat to Dr. F. Werneck from the Instituto Oswaldo Cruz, Brazil, who gave the viscera of these hosts to Dr. J. F. T. Freitas. This material allowed the description of the genus Stilestrongylus Freitas, Lent, and Almeida, 1937 with its type species Stilestrongylus stilesi Freitas, Lent, and Almeida, 1937 (Heligmonellidae), plus 3 other species of Heligmosomoidea, i.e., Hassalstrongylus argentinus (Freitas, Lent, and Almeida, 1937) (¼Longistriata argentina), Hassalstrongylus mazzai (Freitas, Lent, and Almeida, 1937) (¼Heligmonoides mazzai), and Longistriata fortuita Freitas, Lent, and Almeida, 1937, all from a single individual host (Freitas et al, 1937).…”