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

Abstract

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 ridges (14-19), the ridges continuous and all around body, and the presence of a gradient of size of the ridges allow us to place the species within the Heligmonellidae, Nippostrongylinae. The species possesses a unique combination of characters as the synlophe having a carene together with characters of the caudal bursa as the pattern 1-3-1 and the strong development of the dorsal lobe and ray, which precludes its inclusion in any known genus of Nippostrongylinae. A new genus Mazzanema n. gen. is proposed for it, resulting in the new combination Mazzzanema fortuita n. comb.

Rediscovery and New Morphological Data on TwoHassalstrongylus(Nematoda: Heligmonellidae) Coparasitic in the Marsh RatHolochilus chacarius(Rodentia: Cricetidae) from Argentina

“…This is not surprising since among the Heligmonellidae, the females are morphologically very homogeneous and rarely provide characters useful for classification below the family level. The synlophe is then an extraordinary tool allowing the matching of males and females in the case of coparasitic species (Durette-Desset, 1971, 1985Digiani et al, 2013). However, synlophes having numerous or subequal ridges normally provide a lesser number of characters.…”

Helminths of small rodents (Heteromyidae and Cricetidae) in the Yucatan Peninsula, Mexico: an integrative taxonomic approach to their inventory

“…The cosmopolitan Nippostrongylinae are typically parasites of cricetids, whereas species of the New World genus Vexillata have been reported from geomyids and heteromyids and from leporids of the genus Sylvilagus (Digiani et al 2007). The only carenated Nippostrongylinae from the New World is, up to now, the monotypic genus Mazzanema Digiani, Notarnicola & Paulos, 2013, with a species parasitic in Holochilus chacarius from Argentina, characterized by a female synlophe of 19 ridges and a male bursal pattern 1-3-1 (Digiani et al 2013). Attending to the main synlophial and bursal characters of the present specimens, plus the fact that the host is a cricetid, they could be assigned to a genus and species not yet described in the Nippostrongylinae.…”

Cladorchis pyriformis (Diesing, 1838) (Digenea, Cladorchiidae): new rodent host and geographic records in Argentina

“…has been recorded harboring 11 nematode species (e.g. Durette-Desset et al 1997;Notarnicola 2005;Notarnicola et al 2010;Digiani et al 2013Digiani et al , 2015Robles et al 2018), and three digenean species, Cladorchis pyriformis (Diesing, 1838), Urotrema scabridum Braum, 1990, and Schistosoma mansoni Sambon, 1907(Sutton and Lunaschi 1990Picot 1992;Lunaschi and Drago 2007;Fernandes et al 2015).…”