Mémoire

Redescription d’Helminthoxys tiflophila et considérations sur la systématique des Oxyuridae parasites de Rongeurs.

Redescription of Helminthoxys tiflophila and considerations about Systematic of Oxyuridae parasite in Rodents.

Laboratoire de Zoologie (Vers), Muséum National d’Histoire Naturelle, 61 rue Buffon, F 75231 Paris Cedex 05, France.

Accepté : 22 Novembre 1982

Résumé

Redescription d’Helminthoxys tiflophila (Vigueras, 1943), parasite du Rongeur Capromys prehensïlis (Caviomorpha). Analyse cladistique des relations phylogénétiques du genre Helminthoxys et des formes voisines : les Oxyuridae de Rongeurs et de Lagomorphes constituent un ensemble monophylétique. A l’intérieur de cet ensemble les parasites de Rongeurs Hystricognathes (Phiomorpha + Caviomorpha) s’opposent aux Oxyuridae parasites de Rongeurs Sciurognathes et de Lagomorphes.

Abstract

— Morphology — Helminthoxys tiflophila (Vigueras, 1943) parasite in Capromys prehensilis (Caviomorpha, Rodent) is redescribed. In the males of this species occurs a peculiar type of ventral cuticular swellings. The adherence with cuticule of females is not obtained by hooking, but by gluing : a ventral hypodermal secretion coagulates on surface of swellings.

— Systematic — The genus Helminthoxys Freitas, Lent and Almeida, 1937 is compared by means of cladistic method with the most closely related forms :

• 1 —

  The genera Helminthoxys and Octodonthoxys Quentin, Courtin and Fontecilla, 1975 cannot be distinguished using this method,

• 2 —

  Helminthoxys-Octodonthoxys is the sister group of Wellcomia, Sambon 1907, Protozoophaga Travassos, 1923.

• 3 —

  These four genera, all parasite in Hystricognathi Rodents may be opposed as a sister-group to the Oxyuridae parasite in Sciurognathi Rodents and Lagomorpha.

• 4 —

  The whole Oxyuridae parasite in Rodents (excepted Citellina Prendel, 1948) and Lagomorpha form a monophyletic group.