TRICHODORUS ALTAICUS SP-N (NEMATODA, TRICHODORIDAE) AND A KEY TO THE SPECIES OF THE GENUS TRICHODORUS

A new species of the family Trichodoridae is described from the Asian part of the Russian Federation. Trichodorus altaicus sp. n. is charact erized by the onchiostyle length (39-47 mu m) and absence of pharyngea l gland or intestinal overlaps in males and females; presence of two v entromedian cervical papillae located posterior to the base of the onc hiostyle but anterior to the excretory pore, posterior supplement situ ated at level of the proximal end of the retracted spicules, spicule l ength (38-47 mu m) and shape of the spicules in the males; presence of two pairs of lateral body pores, pore-like vulva opening in ventral v iew and shape of the vaginal sclerotizations in the females. A key to the species of the genus Trichodorus is presented.