On the morphology of the male, female and fourth-stage larva (female) of Hammerschmidtiella diesingi (Hammerschmidt), a nematode parasitic in cockroaches

Abstract

The male, female and fourth-stage larva (female) of Hammerschmidtiella diesingi are described. Characters are given by which this species can be identified from the female fourth-stage larva.A constriction and ring of clear cells separate the intestine of the male and of the female fourth-stage larva into two parts, and descriptions of the structure and mode of action of this ‘sphincter’ are given.This work was carried out during the tenure of a Research Studentship awarded by the Department of Scientific and Industrial Research.