stylet shaft with one turn
Macrostomum tuba var verbekei Fig 1-4.jpg
A forma do estilete corresponde às figuras citadas de Luther e à de Graff, sendo apenas o orifício, no material presente, terminal, não subterminal. A extensão da abertura varia, mas sempre começa na base da ponta e não se estende, para dentro, até à convexidade da curva.
Macrostomum sp. Fig 9-11.jpg
The stylet ends slightly inflated, and this expansion is not accompanied by a thickening of the wall. The orifice of the stylet was not seen with certainty, probably it is subterminal. p. 30
Macrostomum phocurum Fig 18-24.jpg
Der 0,3 mm lange Wurm mit grossen Augen... p. 15
Bradynectes sterreri Fig 24.jpg
The stylet has a subterminal opening, and is ending in a blunt massive extension. The stylet is surrounded by bristles, 35-40 micrometer long, all but two roughly of the same type. The two bristles nearest to the stylet have a subterminal large and flattened lateral hook. p. 116
Macrostomum saifunicum Fig 1.jpg
Macrostomum kawamurai Fig 6-9.jpg
The spermatozoon is a very slender fibre, consisting of a small round head and a long winding tail. p. 79
Macrostomum japonicum Fig 10-13.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 viride cf. rostrata Fig 34-36.jpg
...l'apertura distale può trovarsi vuoi dalla parte conca va dello stiletto, vuoi dalla convessa o anche lateralmente. p. 313