Dr. Murai Éva szerk.: Parasitologia Hungarica 23. (Budapest, 1990)

Table 6 Metrie data of the hooks of Polymorphus diploinflatus from Anas platyrhynchos - No 2118 Measurements in /xm N Blade Root N length thickness length thickness 1 56 3-67. 5 12 5-15 0 50 0-60 0 10.0-11.3 2 65 0-70, 0 15 0-18 8 57 5-62 5 11. 3-13.8 3 67 5-72 5 17 5-20 0 62 5-70 0 12.5-15.0 4 65 0-75. 0 20 0-25 0 62 5-75 0 12.5-17.5 5 52 5-57 5 12 5-17 5 37 5-27 5 10.0-17.5 6 50 0-55 0 12 5-16 3 25 0-27 5 7 47 5-55 0 12 5-15 0 12 5-15 0 8 47 5-55 0 12 5-16 3 25 0 9 42 5-50 0 12 5-15 0 Remarks: First LUNDSTROM (1942), cited by PETROCHENKO (1958), described these spe-cies from Anas platyrhynchos in Sweden. There are some descriptions in the literature illustrating its variability. Metric data of specimens studied compared to the literature (according to LUNDSTROM 1942, SHIRINOV 1962a and KHOKHLOVA 1966b) are presented in Table 5. The specimens studied are morphologically similar to descriptions in the literature. The differences concern length measurements of some of the proboscis which in our speci-mens are up to 0.613 (0.60 in LUNDSTROM 1942); the last hooks which are larger (0.0425-0.055 compared to SHIRINOV 1962a - 0.0421-0.0453); the eggs which are shorter (up to 0.070) compared to LUNDSTROM 1942 (0.09-0.10) and KHOKHLOVA 1966b (up to 0.108). Polymorphus diploinflatus was reported from Azerbaijan SSR (SHIRINOV 1962a,b; VAIDOVA 1963), from Chukotka (KHOKHLOVA 1966b) and from Bulgaria (TSACHEVA 1967). P. diploinflatus is first reported for the Hungarian fauna.