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Résumé

Le Nématode Spiruride Spirura guianensis (Ortlepp, 1924) récolté jusqu'alors chez des Primates néotropicaux est identifié chez différentes espèces de Marsupiaux de Guyane : Caluromys philander (L.), Marmosa cinerea amarare Thomas et Philander (Metachirops) oppossum (L.). Le développement larvaire des trois premiers stades du Néma tode est obtenu expérimentalement chez l'Insecte Locusta migrato ria. L'ontogenèse céphalique révèle que les structures péribuccales des larves infestantes sont différentes de celles du 4e stade et de l'adulte, et indique une évolution par rapport aux structures cépha liques plus simples des espèces Spirura talpae, S. rytipleurites seurati et S. portesiana.

JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact support@jstor.org.. The American Society of Parasitologists is collaborating with JSTOR to digitize, preserve and extend access to The Journal of Parasitology. ABSTRACT: The oxyuroid Syphacia mesocriceti Quentin, 1971, from the golden hamster, Mesocricetus auratus (Waterhouse, 1839), is described with the aid of light and scanning electron microscopy. Cephalic extremities of males and females differ from those of all other species of the genus Syphacia. Males and females have reduced lips and a triangular stoma but differ from species of the subgenus Syphatineria with similar features by having a flanged esophageal cuticle with serrated edges. The operculate eggs are large. Three mamelons on the previously undescribed males put this species in the subgenus Syphacia. QUENTIN, J. C. 1971. Morphologie comparee des structures cephaliques et genitales des oxyures du genre Syphacia. Ann. Parasit. 46: 15-60.

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