Two new and a known species of the genus Oriverutus Siddiqi, 1971 (Nematoda: Dorylaimida) from Japan

摘要

Two new and a known species of the genus Oriverutus Siddiqi, 1971 is described and illustrated. Oriverutus arcuicaudatus sp. n. is characterized by having 0. 61-0. 71 mm long body; lip region distinctly offset with protruding labial papillae; 16-17 μm long, attenuated odontostyle; amphidelphic gonad with unsclerotized pars refringens vaginae; a small post-rectal sac; ventrally arcuate tail and male with a single ventromedian supplement. O. parvus sp. n. has 0. 65-0. 71 mm long body; lip region slightly offset with prominent labial papillae; 13-14 μm long, attenuated odontostyle; amphidelphic gonad with sclerotized pars refringens vaginae and elongate conoid, slightly dorsally bent tail. O. occidentalis Pena Santiago and Peralta, 1995 is reported here for the first time from Japan.