Dr. Kassai Tibor - Dr. Murai Éva szerk.: Parasitologia Hungarica 10. (Budapest, 1977)

\ Male: Body length 4.30-7. 20 mm, maximum width 0. 082-0.090 mm. Esophagus length 0.300.50 mm. Nerve ring 0.14-0.20 mm, excretory pore and deirids 0. 22-0. 35 mm from anterior end. Bursa bilobed and symmetrical. Small dorsal ray with bifurcating end; inner branches longer than the external ones. Externo-dorsal rays slender and long. Lateral rays relatively weak, originate from common trunk. Postero-lateral rays branching off at the base of it. Strongly developed ventral rays also from a common stem. Postero-ventral ray s the most developed. Praebursal papillae present. Well seen genital cone with two papillae. Threadlike spicules, 0. 56-0. 63 mm long. Gubernaculum absent. Fig. 3: Heligmosomoides Iaevis (Dujardin, 1845) A) Anterior end of female - B) Synlophe of female - C) Bursa copulatrix D) Dorsal ribs - E) Tail of female, ventral view.