Aporcelaimellus saprophilus sp. n., a new freshwater nematode from Central Russia (Nematoda: Dorylaimida: Aporcelaimidae)

Abstract. Aporcelaimellus sarpophilus sp. n. from Lachost River (Yaroslavl Prov., Central Russia) is described and illustrated. It differs from A. cylindricus Ahmad, 1995 in the thicker body, longer odontostyle and spicules and larger number of supplements in males; from A. simus (Andrássy, 1958), it differs in the thicker body, distinctive shape of the lip region, longer odontostyle and spicules, larger number of supplements in males.