stylet shaft curved
Macrostomum ensiferum Fig 27.jpg
Macrostomum goharii Fig 2.jpg
The penis stylet is very characteristic to this species, as it has an enlarged bulbous proximal part which leads ventrally to a narrow long vertical tube with an oblique sharp distal aperture. p. 591
Macrostomum bulbostylum Fig 19-22.jpg
Macrostomum gracile Fig 20-21.jpg
The stilette has the form of the typical Macrostomum funnel which contains a widend crenate base and which narrows to quite an unorthodox termination. The opening is terminal and is limited by a turned up and sharpened margin. p. 199
Macrostomum infundibuliferum Fig 23.jpg
The penis-stilette is a slightly curved funnel with a widened base which is deeply indented. The external opening is terminal. p. 200
Macrostomum thermale Fig 11.jpg
The penis stilette is depicted as an irregular tube with a distal terminal splitting of the thickened walls. Taxonomically, M. lutheri is placed in species dubiae of the genus Macrostomum because of the unscientific methods used and the lack of material upon this animal. It is this present author's opinion that the stilette shown in figure is a greatly flattened and distorted stilette of Macrostomum bulbostylum mihi described in the same paper (GIEYSZTOR 1931). p. 143
Macrostomum thermale Fig 33-34.jpg
The pigmentspherules composing the cup (eyes) are the smallest that I have studied. Stylet: This tubular structure presents the figure of a long funnel with a widened crenate base and a slightly expanded termination. The opening is terminal. This species possesses a unique sperm-cell. This singular cell measures 36 micro in length and is equipped with the characteristic pair of anterior setae, a very thin feeler, and a tail region which bears a pair of lateral undulating flanges, in which region the chromatin granules are located. Chromatin granules are usually located in the anterior region of the sperm cell in Macrostomum. The feeler is a highly vibratile process. p. 125
Macrostomum tuba Fig 2-3.jpg
Macrostomum tuba Fig 1.jpg
L'appareil copulateur mâle présente un tube large à sa base et qui va en s'amincissant: à l'endroit marqué d'un astérisque et il est un peu recourbé. Dans sa partie terminale il se recourbe en sens inverse par rapport à la première courbe, de la place, marquée d'un astérisque et forme une figure qui rappele un pied. On y voit distinctement les épaississements des parois. p. 311