habitus detail
Macrostomum minutum Fig 21d-g.jpg
Macrostomum delphax Fig 4-9.jpg
Macrostomum tuba var gigas Fig 1-5.jpg
The male copulatory apparatus differs from that of other species of the genus in the chitinous portion which does not lie in a plane. The terminal portion is irregularly twisted and the tip is bent nearly perpendicular to the axis of the main portion. The terminal opening is always truncated obliquely. The spermatozoa resemble those of M.tuba, consisting of a spindle-shaped head and a short tail. At a point between the head and the tail it has two long flagellae which are inconspicious by their rapid vibration. p. 78/79
Macrostomum lutheri Fig 1-4.jpg
Macrostomum retortum Fig 10-15.jpg
Promacrostomum gieysztori Fig 51.jpg
Bradynectes sterreri Fig 2.jpg
Macrostomum sinensis Fig 1-8.jpg
The penis st ylet gonopore opens on the side of the penis end, which is ball-like. p. 720
Macrostomum xiamensis Fig 4-13.jpg
Acerose smooth penis stylet, no chitin valve in the surface. Its far-forth end show helical curly form. The penis stylet is like end of injector, opening at outboard part of helical bend. p. 703