ULTRASTRUCTURAL OBSERVATIONS ON THE BODY CUTICLE OF FOUR SPECIES OF TYLENCHIDAE ÖERLEY, 1880 (NEMATA: TYLENCHIDA)
Authors
D. Mounport
P. Baujard
B. Martiny
Abstract
The fine structure of the body cuticle of Cephalenchus emarginatus, C. lobus, Cbslenchus franklinae and Filenchus sp. is described from ultrathin sections. There are two major zones, a cortical zone and a basal zone. The cortical zone consists of external and internal layers; the external layer is trilaminate in all species except in C. franklinae where it appears multilayered; the internal layer is granular and consists of alternate striated and non-striated sublayers except in C. franklinae; longitudinal ridges in this species result from a thickening of the internal cortlical layer. The basal zone consists of a striated layer never exceeding 30% of total cuticle thickness. These observations on the cuticle of Tylenchidae reveal a more simple structure than that found in previous studies of other families of the Tylenchina.