Dr. Murai Éva szerk.: Parasitologia Hungarica 21. (Budapest, 1988)
14-19th proglottides; in those from R/L_s^bi^rr_aneus - from 11-16th to 16-21st proglottides; in those from .M._guenjheri - from 15-17th to 21-22nd proglottides. Two alternative explanations can be proposed for these differences. On the one hand, they can be a result of the development of the cestodes under the different physiological conditions of the hosts, i.e. the so-called "influence of the host 1 ', or as MA'YR (1971) defined "non-genetic modification depending on the host". On the other hand, they can be a consequence of the entire or partial isolation of helminth populations studied in the different hosts, resulting in initial stages of speciation. Additional investigations are needed to decide which of these two expanations is the correct one. Anoplocephaloides rauschi Genov, Georgiev et Biserkov, 1984 (Figs 7-10) Host: Mk^otus_nj_yal_is Martins, 1842, ^^_s^bterr_aneus_de Selys-Longchamps, 1836. Habitat: small intestine. Material studied: from M. nivalis - No. 8096-3 (1 spec. , holotype), cirque Bajouvy Doupky {Pirin Mts.), 2.7.1983; No. 7952 (1 spec, paratype), cirque Golyam Kazan (Pirin),' 10.9. 1957; No. 8375-3 (11 spec), No. 9379-1,2,3 (3 spec), No. 9419-2 (3 spec), cirque Gölyam Kazan (Pirin), 5-8.7. 1984; No. 9838-1 (1 spec), cirque Golyam Kazan (Pirin), 24.10.1984; No. 10551 (1 spec), cirque Golyam Kazan (Pirin), 8.7.1985; No. 6675 (2 spec), No. 6678 (1 spec, in bad condition), cirque Razlozhky Sukhodol, 11. 10. 1979; No. 162/41 (1 spec ) chalet Eltepe (Vikhren) (Pirin), 21.6.1957; No. 7961 (1 spec, in bad condition), chalet Aleko (Vitosha Mts. ), 6. 12. 1956; from jM^subter ran eus - No. 9885 (1 spec), cirque Bajouvy Doupky (Pirin Mts.), 26.10.1984; No. 11832-1, 2, 3 (3 spec. ), cirque Bajouvy Doupk}, 30. 6. 1986. i Besides the new data about the variability of the metric characters (Table 3), the presence of trichoid covering on the scolex, neck and the anterior part of the strobila can be added to the initial description of this species (GENOV et al., 1984). The length of the filaments is 0.0030. 005. Remarks: The initial description of A. rauschi was based on two specimens from _mvalis collected in the higher regions of the Pirin Mts. (GENOV et al., 1984). Some new material collected in the same place revealed that besides its type host this species parasitizes also M. subterraneus. A. rauschi is probably widespread in the higher regions of the Vitosha Mts. (judging by a badly preserved specimen from M..nivalis which, by the measurements of the strobila, shape of the scolex and bilateral position of the genital pores, corresponds only to A. rauschi among all the known species of Anoplocephalidae in Bulgarian rodents). The data in Table 3 revealed that A. rauschi is characterized by a considerable variability of the main features. The differences in the range and the means are not significant and the samples studied cannot be morphologically differentiated. Anoplocephaloides tenoramuraie sp. n. (Figs 11-21) Host: ^jiiyjalis Martins, 1842, M^s^ubjerj-aneus de Selys-Longchamps, 1836. Habitat: small intestine. Material studied: HOLOTYPE - No. 10509-1, M^jiivalis, cirque Golyam Kazan (Pirin Mts.X about 2600 m a. s. 1. 3.7.1985; PARA TYPES: from M. nivalis - 10509-2, 3, 4 (2 spec, and 1 fragment). No. 10527 (2 spec). No. 10550-1, 2 (2 spec. ), cirque Golyam Kazan (Pirin Mts. ), 3-5.7. 1985; from M^jubjerrj^neus - No. 9810-3 (1 spec). No. 9887-1 (1 spec), cirque Bajouvy Doupky
