SEM OBSERVATIONS AND DESCRIPTION OF PLECTUS CYLINDRICUS SP. N. (NEMATODA: PLECTIDAE), FROM CALIFORNIA, USA

摘要

A new species of Plectus Bastian, 1865, P. cylindricus, is described and illustrated. The new species is characterized by its large size, indistinct annulation, one longitudinal ala on each lateral side of the body (appears as two lateral alae on each side by SEM), cephalic region low, and not set off from the body. Cephalic setae do not reach the apex of the head region. Cervical papillae setiform, tail conoid with 5 setae.