Dr. Murai Éva - Gubányi András szerk.: Parasitologia Hungarica 28. (Budapest, 1995)

Discrimination of T. serialis specimens was possible only on the basis of the large hooks (95.5, 81.8, and 100 %, respectively). The small hooks of T. serialis specimens overlap one another and/or are in partially agreement with those of T. ovis, T. multiceps and T. brauni. T. taeniaeformisis is absolutely different (100 %) from the other specimens. Specimens of T. solium like T. serialis overlap one another, especially in respect of the small hooks. Larval T. solium labelled MHNG-13

1/55 shows considerable variance: its small hooks of are classified as T. crassiceps, T. kotlani and T. acinonyxi, while its large hooks are mostly placed (66.7 %) among T. polyacantha. Cotypes of T. parva are partially separated from one another, especially by their small hooks, the small hooks of T. parva labelled MHNG123/88 are absolutely distinguishable from those of other one designated MHNG123/86. At the same time, the small hooks in mount MHNG123/86 can be discriminated in 80.0 % and show only 20.0 % similarity to those of MHNG-123/88. Cross-similarity of the large hooks for the above-mentioned two specimens is 23.1 and 58.3 %, respectively. Separation of the hooks of adult T. crassiceps tapeworms has proved to be low to moderate (0-90.0 %). Their small hooks slightly overlap one another and are consistent with those of T. polyacantha and T. solium. The large hooks of the specimens examined resemble only one another. The rate of separation of T. ovis by the small hooks is 86.4 % and they are placed between T. brauni and T. serialis (9.1 and 4.5 %, respectively). In contrast to the small hooks, the large hooks can be distinguished only in 35.3 % and they are similar to those of T. serialis and T. brauni. Segregation of T. polyacantha also proves to be good (small hooks 87.5 %, large hooks 81.3 %) The small and large hooks of T. polyacantha are in part classified among the small hooks of T. solium (12.5 %, 18.7 %). According to the results of discriminant analysis the 18 species must be divided into more groups than the original 18 ones, so the entire material is reclassified into the following 24 groups: T. acinonyxi, T. brauni, T. selousi, T. "selousi" (MHNG-124/29, T. martis, T."hydatigena I" (MHNG-15/40), T. "hydatigena II."(MHNG-15/41), T. "hydatigena III."(MHNG123/25), T. "hydatigena IV" (HNHM13202)", T. parenchymatosa, T. kotlani, T. laticollis, T. multiceps, T. pisiformis, T. "pisiformis" (HNHM-7835/132B), T. regis, T. "regis" (MHNG-94/47), T. serialis, T. taeniaeformis, T. solium, T. parva, T. crassiceps, T. ovis, T. polyacantha (Fig. 6-7). Figure 8 represents the minimum spanning trees superimposed on the scatter plot for the two canonical variate means (centroids) of the 24 groups. T. taeniaeformis is the most distant from all other taxons. T. regis, T. "regis"

, T. selousi T. "selousi", T. parva, and T. laticollis are far from one another and also from all the other groups. T. brauni and T. serialis are also segregate, but jointly constitute a distinct group at the other end of the tree. The large hooks of T. "hydatigena III" and T. crassiceps, as well as the small ones, seem to have unique morphometries. The hooks of T. parenchymatosa are far from all the other hooks, too. The small and large hooks of T. polyacantha, T. ovis and T. solium manifest a different pattern. T. multiceps, T. "hydatigena IV", T. kotlani and T. acinonyxi are located at the centre of the tree. T. "hydatigena I" is at the starting point of the branch of T. "hydatigena III", however, the two forms are far