Longidorella xellura and Oriverutus parvus from Cuc Phuong National Park are described and illustrated for the first time in Vietnam. Longidorella xellura species is characterized by its small body 0.72 mm long
lip region continuous
odontostyle typical of the genus, slightly arched
odontophore linear, rod-like
female genital system didelphic-amphidelphic
tail conical elongated with finely rounded tip. Oriverutus parvus species is characterized by its body 0.64-0.68 mm long
lip region slightly angular, offset by depression or weak constriciion
lips moderately amalgamated with protruding papillae but not typically lobe-like
odontostyle moderately robust
odontophore rod-like
female genital system didelphicamphidelphic
tail conical with pointed tip.