Myctolaimellus robiniae n. sp (Diplogasterida : Cylindrocorporidae) from larval cavities of the locust borer, Megacyllene robiniae Forster

A new nematode species of the family Cylindrocorporidae and the genus Mycto laimellus from subcortical cavities made by the locust borer (Megacyllene r obiniae Forster) in black locust (Robinia pseudoacacia L.) is described. Ma les of the new species have a length of 700 to 1,050 mum; a bursate tail, p eloderan with nine pairs of rays; and knobbed, curved spicules with tips be nding gently into a hook. The distinctive gubernaculum is half the length o f the spicules, deeply grooved longitudinally along both its dorsal and ven tral surfaces, and has a spoon-shaped end. Females have a length of 830 to 1,340 pm, an amphidelphic reproductive tract with long ovaries crossing eac h other to extend beyond the equatorial vulva, and a gradually tapering tai l.