title: Redescription of Echinocoleus hydrochoeri (Travassos, 1916) (Nematoda: Trichuridae) from Hydrochoeris hydrochaeris Linnaeus, 1766 (Rodentia: Caviidae) from Argentina.
abstract: Twenty-eight Capillariinae species have been recorded in rodents; 1 of these species was reported from a caviomorph rodent, Hydrochoeris hydrochaeris (capybara), and placed in the genus Echinocoleus by Moravec (1982). However, both original description and subsequent contributions of Echinocoleus hydrochoeri are poor and incomplete. In this paper, this species is redescribed, and a new geographical distribution is reported. The redescription is based on morphologic and morphometrical features; intestine ends in a cloaca beside ejaculatory duct, caudal bursa composed of 2 large ventrolateral lobes with a fleshy internal part and a membranous external part (they are not united dorsally with a membrane), 1 pair of caudal papillae, terminal part of cylindrical cirrus ornamented with thin and thick spines (and particular pattern distribution), sclerotized spicule in male, and vulvar appendage in female, and 3 bacillary bands (1 ventral and 2 lateral). Generic and specific analyses were performed to establish new standards for future studies on the systematic position of Capillariinae species. This study presents new morphological information and a new record of a capillariid species from Argentina.
authors: Centro de Estudios Parasitológicos y de Vectores CEPAVE (CCT-CONICET-La Plata) (UNLP), La Plata, Buenos Aires, Argentina. rosario@cepave.edu.ar
authors: María del Rosario
authors: Mdel R
authors: Robles
authors: María Ayelen Teresita
authors: MA
authors: Eberhardt
authors: Odile
authors: O
authors: Bain
authors: Pablo Martín
authors: PM
authors: Beldomenico
mesh_terms: D000818:Animals; D001118:Argentina; D017189:Enoplida Infections / Q000469:parasitology / Q000662:veterinary*; D005260:Female; D007421:Intestine, Small / Q000469:parasitology; D008297:Male; D008855:Microscopy, Electron, Scanning / Q000662:veterinary; D012376:Rodent Diseases / Q000469:parasitology*; D012377:Rodentia; D013270:Stomach / Q000469:parasitology; D014259:Trichuroidea / Q000033:anatomy & histology / Q000145:classification* / Q000648:ultrastructure