Abstract
Two nematode parasites are described from the turtle Pelusios sinuatus of southern Africa. Camallanus chelonius n. sp. (Camallanoidae) is easily distinguished from other species reported from Africa in possessing less than 10 smooth ridges in the buccal valves. It most closely resembles a group of seven species described from Indian amphibians but may be differentiated from these by a combination of characters: shape of the female tail and distal end of the spicules, male caudal papillae, presence or absence of small barbs between the bases of the buccal valve ridges. C. chelonius is intermediate in cephalic morphology between other Camallanus spp., which are all restricted to fish and amphibian hosts, and the genus Serpinema reported only in turtles. Falcaustra pelusios n.sp. (Cosmocercoidea) is the first species of the genus reported in pelomedusid turtles. It is easily distinguished from all other species by the presence of two large and complex cheilostomal rings in the cephalic end, a very short male tail, large gubernaculum, relatively short thick spicules and large number (more than 50 pairs) of subventral preanal muscle cells posterior to the sucker. ac]19810907
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