stylet shaft decoration lined
Macrostomum rossicum Fig 21-24.jpg

The opening is subterminal, the proximal end is cut obliquely, it's edge has longitudinal folds (creases). p. 33
Macrostomum phytophilum Fig 31-36.jpg

Macrostomum mosquense Fig 40-42.jpg

Macrostomum fergussoni Fig 15.jpg

Macrostomum coomerensis Fig 4.jpg

the distal two thirds of the stylet are spiralled. The distal tip (of the stylet) is broadend, the opening of which lies subterminally. p. 518
Archimacrostomum sublitorale Fig 2.jpg

The distal opening is subterminal on the convex side of the distal bent part. p. 15
Macrostomum appendiculatum Fig 7-8.jpg

Macrostomum bulbostylum Fig 32-35.jpg

Macrostomum appendiculatum Fig 1-5.jpg

Macrostomum glochistylum Fig 13-19.jpg

The small reniform eyes are not embedded in the tissues of the ganglia. The penis-stilette is a long, curved funnel which extends from a widened proximal base to end in a slightly bent obliquely truncated terminus. The stilette termination is distinctly provided with a thin lip which projects slightly beyond the opening proper. p. 195 The sperm cell in this form is a spindler-shaped structure which is much shorter than usual for Macrostomum. Chromatin granules are present in the anterior region of the cell, while posteriorly directed setae are absent. p. 196