Abstract:
The primitive phallic lobes divide longitudinally into two pairs of lobes, an inner and an outer lobe. The two inner lobes fuse along their median lines and form the aedeagus and the outer lobes are transformed into the parameres, which remain small and unsegmented. The forceps arise as appendages from the ninth abdominal sternite at a later stage than the primary phallic lobes and quite independently of them. The apical portions of the forceps are constricted off and ultimately form the claspers. The median process arises as a diverticulum of the dorsal side of the aedeagus and this appendage has nothing to do with the phallobase. There are nine segments in the abdomen of the adult fly. The anal cerci are the appendages of the ninth abdominal sternite.
Page(s):
11-17
DOI:
DOI not available
Published:
Journal: Pakistan journal of scientific research, Volume: 19, Issue: 1, Year: 1967