Dr. Murai Éva szerk.: Parasitologia Hungarica 12. (Budapest, 1979)

Heligmosomoides polygyrus polygyrus (Dujardin, 1845) (Fig. lOa-b) Hosts: Apodemus flavicollis, A. sylvaticus. - Location: small intestine. Synlophe: Surface of body with 30-32 longitudinal cuticular ridges (crête), these are stronger at ventral side. Male: Body length 5.2-6.3 mm, maximum width 0.09-0.10 mm. Esophagus length 0.41-0.46 mm. Nerve ring 0.27 mm, excretory pore 0. 26-0. 34 mm, filiform deirids 0.330. 45 mm from anterior end. Bursa copulatrix asymmetrical. Ventral and lateral ridges rise separately from a common stem. External-dorsalis ridges are thickened at base. Dorsal ridge is branching into four. Spicules 0. 52-0. 65 mm long. Gubernaculum absent. Female: Body length 13.3-14.6 mm, maximum width 0. 18 mm. Esophagus length 0.55-0. 65 mm. Nerve ring 0. 24-0. 25 mm, excretory pore 0. 38-0. 48 mm from anterior end. Distance of vulva 0. 33-0. 35 mm, that of anus 0.09-0. 14 mm from posterior end. Tail with terminal spike. This species is generally identified in the literature under the name of Heligmoso mum skrjabini, and is the common parasite of the Apodemus species. It was found in Apodemus agrárius, A. flavicollis and A. sylvaticus by POPESCU and BARBU (1971). Beside these 3 host species it was also mentioned in Mus musculus spicilegus by POPESCU et al. (1974). Fig. 10: Heligmosomoides polygyrus polygyrus (Dujardin, 1845) A= Synlophe of female; B = Bursa copulatrix Heligmosomoides glareoli Bay lis 1928 (Fig. lla-b) Hosts: Microtus nivalis, Clethrionomys glareolus. - Location: small intestine. Synlophe: Surface of body with 16 longitudinal cuticular ridges (crête). Ridges from just behind vesicle and to bursa in males, to vulva in females. Two ventral ridges strongly developed.