Dr. Kassai Tibor - Dr. Murai Éva szerk.: Parasitologia Hungarica 9. (Budapest, 1976)
Systematica The 4 Cestode species found in bats indigenous in Hungary belong to the family Hyme- nolepididae Raillet et Henry, 1909. With regard to SPASSKY's findings (1954), they can be classified into two genere, above all by differences in the structure of the scolex. MYOTOLEPIS Spassky, 1954 Myotolepis grisea (Beneden, 1873) Tenora et Barus, 1960. Hosts: Myotis myotis, M. blythi oxygnathus, M. nattereri, Eptesicus serotinus, Rhinolophus ferrumequinum. - Localization: small intestine. - For habitats see Table 2. This species is the most frequent bat cestode in Hungary. It was found to occur in bats from 26 localities in the comitats Győr-Sopron, Vas, Zala, Veszprém, Somogy, Baranya, Bács-Kiskun, Pest, Nógrád, Heves, Borsod and Szabolcs-Szatmár. - Extensity and intensity differ between host species, being 18.2%, 1-83 specimens in M. myotis, 18.5%, 1-67 specimens in M. blythi oxygnathus, 5.2%, 2 specimens in M. nattereri, 58.3%, 1- 61 specimens in E. serotinus, 20.7%, 1-65 specimens in Rh. ferrumequinum. Description of Myotolepis grisea on the basis of our material Small hymenolepidid. Specimens found during the summer period (July to September) containing mature eggs are 25-40 mm in length and 0. 6 mm in maximum width. The tapeworms recovered during the inactive period of the bats usually consist only of the scolex and of a few proglottids without genital organs. Such 2-5 mm long specimens show acraspedote edges, but the more developed or mature ones generally have proglottids 25-40 n greater in distal than in proximal width, imparting slightly serrated contours to the strobile. This feature varies largely, depending on the degree of proglottid contraction. The structure and measurements of the scolex can be regarded as constant within a narrow range of variations. It is either roundish or tapers slightly anteriorly, and is 190230 u long by 200 n wide. It bears four round suckers, 70-80 n in diameter, and an unarmed rostellum, 120-140 x 50-65 u in size (Fig. l ). There is no invagination behind the scolex, and the 0. 5 mm long cervical part is 150-200 u in diameter. The mature strobila consists of approx. 500 proglottids. These are trapezoid-shaped, widening slightly posteriorly, and are usually twice as wide as long (in a strongly contracted state the width is 4-5 times greater than the length). The young proglottids not showing genital organs measure 250 x 70 u, the hermaphroditic proglottids 270-480 x 80150 ju, and the mature ones 500-600 x 200-260 u. The proglottid size is much smaller in specimens not containing ripe eggs. The pairs of excretory ducts pass at a distance of 70-90 u from the edge of the strobila, and are 9-10 ; u in diameter. The genital pores localize at one side of the strobila, in the upper third of the proglottid. A single genital pore may be exceptionally found contralateral^ (Fig. 3). The cirrus sac extends up to the level of the excretory duct; its length varies between 40-50 p (in young segments) and 90-100 ja (in mature segments), and its diameter is 30-45 u. Both internal and external seminal vesicle are present; the former measures 30-45 x 45-60 u, the letter is 35-40 ju in diameter. The gonads are centrally located in the proglottid (Figs. 2- 3). The testes are round and 50-70 u in diameter (in young proglottids the testes are 20-30 jU in diameter; in strongly contracted proglottids the testes assume an egg-shape and measure 40-90 ju). The ovary is small with irregular contours, 40 u in diameter. The viteUine gland localizes beneath the ovary, either in central or slightly apolar position within the posterior field. The vagina opens behind the cirrus sac. The seminal receptacle is 40-50 ju in diameter, and 90 x 140 ju in maximal size. The uterus is an even sac-like structure, filling the entire medullary parenchyme within mature proglottids (Figs. 4-5). The eggs are sphaerical, 32-35 p in diameter, the oncosphere is 2232 u in diameter, and the embryonal hooks are 15 ^u long.
