Abstract
Morphology of the molting process and stylet regeneration of larvae of the pin nematode, Paratylenchus aciculus, was investigated. Numerous refractive granules appared around the oesophageal region accompanying a disappearance of the stylet in second stage larvae. These granules disappeared in fourth stage larvar. The period of the third larval stage was found to be vary short. Stylets formed by third and fourth stage larvae did not appear to be functional, and, accordingly, feeding was not considered to be essential for these larval stages. Regeneration of the stylet during the fourth molting occurred only in the female. Regeneration of the stylet advanced reverse in the dissolution of the stylet in the second molting..
