Parasites of South African wildlife. XVII. Ostertagia triquetra n. sp. (Nematoda: Trichostrongylina) from the grey rhebuck, Pelea capreolus (Forster, 1790)

BOOMKER, J. & DURETTE-DESSET, M-C. 2003. Parasites of South African wildlife. XVII. Osterta­ gia triquetra n. sp. (Nematoda: Trlchostrongyllna) from the grey r1lebuck, Peles capreolus (Forster, 1790). Oncierstepoort Journal of Veterinary Research, 70 :37-41 Re-examination of Teladorsagia hamata (MOnnig, 1932) Durette-Desset, 1989 reported from grey mebuck, Peles capreoIus (Forster, 1790) proved it to be a new species of Ostertagia. Ransom, 1907. The new species, for wtJich the name Ostertagia triquetra n. sp. Is proposed, differs lrom TeIadorsa­ gia. hamata in the configuration of the bursal rays (2-1-2 In tile former, 2-2-1 in the latter), and in that the interno-dorsal branch of the spicules bears a process that Is triangular and convex in the new species, but concave and shaped like an ice-cream scoop in Te/adorsagia hamats. Ostertagia triquetra has so far been found only in grey mebuCk In the Eastern Cape Province while Teladorsagia hamata was recorded from springbok, Ant/dorcas marsupis/is (Zimmerman, 1760) and gemsbok, Of)'K gaze/la (Unnaeus, 1756) In the western part of tile country.