Dr. Kassai Tibor - Dr. Murai Éva szerk.: Parasitologia Hungarica 7. (Budapest, 1974)

PILO (1973) noted it from the Soviet Union (Ukraina). In areas adjoining Mongolia, from small mammals S. obvelata (Rud. 1802), S. montana Yamaguti, 1943, and S

. stroma (Linstow, 1884) have been recorded. S. obvelate was noted by SPASSKY, RYZHIKOV and SUDARIKOV (1952), MATSHULSKY (1959), BARUS, KULLMAH and TEHORA (1970) and JUSHKOV (l97l), S. montana by BARUS, KULLMAH and TENORA (1970), MERKUSHEVA (1963) and JUSHKOV (1971). The latter species was found also in Czechoslovakia by TENORA (1967). As seen from QUENTIN's comprehensive work, one can hardly evaluate the above data, as the most important characters are largely missing from these descriptions. Thus nothing definite can as yet be said regarding the geographical distribution of S. nigeriana . Farn.: Rictulariidae Railliet, 1916 5. Rictularia cristata Froelich, 1802 s. str. non Dujardin (2 00, 18 99) Host: Microtus b. brandti Localization: small intestine. Description: Dorsally situated mouth-opening . A prominent tooth on proximal portion of esophagus in buccal cavity.Mouth-opening surrounded by 42-47 teeth, sometimes less in young individuals. 42-44 cuticular spines situated in subventral lines on both sides of body. Three pairs of papillae on head portion of body (Figs. 5A, B, C). Male: Body length 7.80-9.60 mm, maximum width 480 u. Esophagus length 2.10-2.20 mm. Buccal cavity 75-93 x 25-31 ^u. Nerve ring Fig. 5: Rictularia cristata Froelich, 1802 (Orig.) A) Anterior extremity, en face view B) Anterior extremity, lateral view C) Anterior extremity, ventral view D) Posterior extremity of male, lateral view E) Vulva, lateral view F) Posterior extremity of female, lateral view