The separation of the 2 genera Cephalobus and Eucephalobus depends on whether the lateral field reaches to the tail tip or ends at the phasmids.  However in some species, e.g. E. striatus, the female tail is eucephaloboid in this respect though cephaloboid in being rounded, while the male tail is cephaloboid both in respect of the lateral field and the tail shape.  This situation suggests that further work is necessary for a re-appraisal of the group.