stylet shaft with one turn
Macrostomum virginianum Fig 2-4.jpg
The stilette is curved and obliquely truncated on its convex side. This conical tube is bent at a right angle near its proximal end. p. 27
Macrostomum beaufortensis Fig 4.jpg
The stilette is a greatly curved and highly sharpened funnel with a broad undulating basal rim. p. 234
Macrostomum boreale Fig 16-18.jpg
Macrostomum appendiculatum Fig 1-5.jpg
Macrostomum appendiculatum var sillimani Fig 6-8.jpg
Macrostomum beaufortensis Fig 10-15.jpg
Macrostomum japonicum Fig 26-28.jpg
eyes small, reniform. The penis-stilette is a curved and distally hooked funnel with a terminal opening. p. 204
Macrostomum curvistylum Fig 4-6.jpg
The external opening of the stilette is at an oblique angle. The proximal, basal part of the stilette is crenated. p. 192
Macrostomum collistylum Fig 1-3.jpg
The stylet reaches its termination in a long sharpened point. p. 188 The sperm cells are elongate, undulating bodies which lack the postero-Iateral setae so common to the genus and are possessed of chromatin granules in the anterior part of the cell having the largest caliber. p. 189
Macrostomum lineare Fig 5.jpg
The penis-stilette is a lengthy, tubular structure containing two right angle bends in its main axis. The basal proximal rim is dentate. The enlarged end is quite asymmetrical in that one side wall is always longer and larger than the other one. The sperm cell has a feeler, a conspicuous anterior swelling, lateral paired setae, but lacks a definite tail region. This cell lacks observable chromatin granules. p. 275