Cytological Polymorphism in the Nematode Haemonchus contortus (Rudolphi 1803) Cobb 1898


RECENT observations by Roberts, Turner and McKevett1 have indicated that the so-called ovine and bovine ‘strains’ of Haemonchus contortus (Rud. 1803) are distinct species. This conclusion is based mainly on differences in the morphology of the infective larvæ and in the type of cuticular vulval process dominant in adult females in natural populations in… (More)
DOI: 10.1038/174704b0


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