description of adult and fourth-stage larva of litomosoides navonae n. sp. (nematoda: onchocercidae), a parasite of five species of sigmodontine rodents from northeastern argentina.this study describes a new species of litomosoides chandler, 1931, parasitic in five different sigmodontine rodents from misiones, chaco and formosa provinces of argentina. the fourth-stage (l4) larva (male and female) is also described. l. navonae n. sp. exhibits: a bottle-shaped buccal cavity; a buccal capsule with irregularly crenate external walls; four externo-labial papillae and one ventral cephalic papilla; a well differentiated oesophagus; and sigmodontis-type spicules. the microfilaria ...200516315077
phylogenetic and geographical relationships of hantavirus strains in eastern and western paraguay.recently, we reported the discovery of several potential rodent reservoirs of hantaviruses in western (holochilus chacarius) and eastern paraguay (akodon montensis, oligoryzomys chacoensis, and o. nigripes). comparisons of the hantavirus s- and m-segments amplified from these four rodents revealed significant differences from each another and from other south american hantaviruses. the alp strain from the semiarid chaco ecoregion clustered with leguna negra and rio mamore (ln/rm), whereas the bm ...200617172380
redescriptions of the nematodes litomosoides patersoni (mazza, 1928) (onchocercidae) and stilestrongylus stilesi freitas, lent, and almeida, 1937 (heligmonellidae) parasites of holochilus chacarius (rodentia, cricetidae) from salta, argentina.two nematode species are redescribed from the type host species holochilus chacarius thomas (rodentia, cricetidae, sigmodontinae) and from the type locality of 1 of them, i.e., ingenio san martín de tabacal, salta province, argentina. rodents were deposited at the colección mamíferos lillo, tucumán, argentina. litomosoides patersoni (mazza, 1928) (onchocercidae) possesses a buccal capsule with irregular external walls, a buccal cavity smooth, becoming thinner near the oral opening, a complete se ...201020950108
morphological-molecular characterization and phylogenetic relationships of a new trichuris species (nematoda: trichuridae) parasitic on holochilus chacarius (cricetidae: sigmodontinae) from the chaco ecoregion (argentina).a new trichuris species isolated from holochilus chacarius (cricetidae: sigmodontinae) from the chaco ecoregion in argentina is described based on morphological characteristics and mitochondrial (cox1, cob) and nuclear (its2) markers. the new species is distinguished from 27 species of trichuris from north and south american rodents based on morphological and biometrical features, such as the absence of a spicular tube, presence of a cylindrical spicular sheath, non-protrusive vulva, length of s ...201729241714
rediscovery and new morphological data on two hassalstrongylus (nematoda: heligmonellidae) coparasitic in the marsh rat holochilus chacarius (rodentia: cricetidae) from argentina.two species of hassalstrongylus durette-desset, 1971, coparasitic in holochilus chacarius thomas (rodentia, cricetidae) and not recorded since their original description in 1937, were newly found in their type host and locality. hassalstrongylus mazzai (freitas, lent and almeida, 1937) and hassalstrongylus argentinus (freitas, lent and almeida, 1937) were obtained from ho. chacarius from 2 different populations: one from salta province (northwest argentina) and another from chaco province (north ...201526193068
mazzanema n. gen. and mazzanema fortuita n. comb. for longistriata fortuita freitas, lent, and almeida, 1937 (nematoda: heligmonellidae), a parasite of the marsh rat holochilus chacarius (rodentia: cricetidae) from northern argentina.the species described as longistriata fortuita freitas, lent, and almeida, 1937 is here redescribed from new material collected from the type host, holochilus chacarius balnearum thomas, and the type locality, san martín del tabacal, salta, argentina. neotypes are designed for the species since the type material deposited by the authors is lost. the original description did not include the synlophe or the female and both are here described. several characters of the synlophe as the number of rid ...201323574047
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