stylet tip opening terminal
Macrostomum thermale Fig 33-34.jpg
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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 megalogastricum Fig 30-31.jpg
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Macrostomum pseudoobtusum Fig 32.jpg
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The inadequate description of the male genital system, and the failure to have observed the female system in the single specimen found constitutes reasons for placing the species of PEREYASLAWZEWA under the category of species dubiae. p. 144
Macrostomum stylopencillum Fig 6.jpg
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The eyes are small, reniform organs with distinct lens. There is a fine lamella at the bend of the stilette. The end of the stilette is obliquely truncated, backwardly directed toward the base of the penis. p. 121/122
Macrostomum bulbostylum Fig 2-3.jpg
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Macrostomum tubum Fig 15-16.jpg
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Macrostomum minuta Fig 19.jpg
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Macrostomum tuba Fig 2-3.jpg
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Macrostomum tuba Fig 1.jpg
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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
Macrostomum tubum Fig 1-5.jpg
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The eyes are dark, very small crescents, placed near together. p. 42 (bzw. 236)