Abstract
The phenetic relationships of parthenogenet ic and bisexual populations of Haemaphysalis lon- gicornis and populations of several related species were investigated utilizing multivariate analyses. A total of 117 individual specimens (OTU's) representing 37 separate populations were analyzed. Fifty-five characters, 50 quantitative and 5 qualitative, were evaluated for each OTU. The mean of each character within the 37 populations was utilized in numerical taxonomic and factor analyses. Phenograms and graphs generated by these analyses illustrate phenetic relationships among the different species and popu lations. Haemaphysalis lagrangei, H. bispinosa, H. hystricis, and H. mageshimaensi s are separated dis tinctly from each other and from H. longicornis by this taxonomic approach. This agrees with certain classical taxonomic studies which considered them as valid species. Multivariate numerical analyses in dicate phenetic differences between parthenogenetic and bisexual populations of H. longicornis; parthe nogenetic and bisexual populations usually segregate into 2 separable groups through cluster analysis.
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