stylet shaft with more than one turn
Macrostomum reynoldsi Fig 21-25.jpg

Macrostomum obtusum Fig 7-10.jpg

An oval terminal external opening is provided. p. 278
Macrostomum ruebushi var finnlandensis Fig 12-13.jpg

The penis-stilette is a funnel with almost a straight main axis and a sharply pointed and bent termination. The terminal portion enclosing the external opening is bent at an angle of 115 degree. The basal proximal rim is unevenly crenated. The sperm cells have a feeler, body region and a thin filamentous tail. Setae are not present. There is a noticeable massing of chromatic granules in the body region of the cell. p. 31
Macrostomum riedeli Fig 1-7.jpg

The penis -stilette is funnel- shaped with an obliquely truncated base. (Distal?) opening is oval in shape and terminally truncated. p. 291
Macrostomum viride Fig 25-26.jpg

Macrostomum lutheri Fig 29.jpg

Macrostomum ontarioense Fig 1-5.jpg

sperm-cell composed of feeler, middle part with chromatin granules and two setae and 'tail' region. p. 134
Axia gieysztori Fig 22-24.jpg

Pigment granules of the eyes quite small and not of uniform size. Penis stilette a sharply terminated conical tube, base crenated. External opening terminal with outlet on left side, point of stilette is slightly recurved. p. 426
Karlingia lutheri Fig 28-29.jpg

Macrostomum lutheri Fig 4.jpg
