SPECIES AND MORPHS IN THE OSTERTAGIINAE - AN ALLOZYME STUDY OF 7 SPECIES

Five enzymes, malate dehydrogenase, lactate dehydrogenase, mannose-pho sphate isomerase, glucose-phosphate isomerase and phosphoglucomutase f rom seven putative species of Ostertagiinae were compared using starch -gel electrophoresis. The Nei distances were not much affected by orig in of specimens or host species. Six of the putative species could for m polymorphic pairs: Ostertagia ostertagi and Ostertagia lyrata, Oster tagia leptospicularis and Ostertagia kolchida, Teladorsagia circumcinc ta and Teladorsagia trifurcata. The Nei distance was of the same magni tude (>0.6) between species pairs, O. ostertagi, O. leptospicularis, T . circumcinta and Spiculopteragia spp.