Observations on the life-cycles and larval morphogenesis of Haemonchus bedfordi, Impalaia tuberculata and Longistrongylus sabie (Nematoda: Trichostrongyloidea) parasitic in impala, Aepyceros melampus

The previously unknown life-cycles of Haemonchus bedfordi, Impalaia tuberculata and Longistrongylus sabie parasitic in impala, are recorded. Observations on the morphology of the developmental stages and their habitat of these three nematode species are described. The similarities and differences to closely related species or subspecies are discussed.The morphology of the developmental stages of Haemonchus bedford; are compared to the Haemonchus spp., H. confortus and H. placet