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Fig. 4 | Helgoland Marine Research

Fig. 4

From: Reproductive system of the genus Crasiella (Gastrotricha, Macrodasyida)

Fig. 4

Ovaries of Crasiella diplura (TEM microscopy). a Cross-section of the body of a whole animal at the level of the early oocytes. The sperm ducts are sectioned close to their fusion. b An early oocyte. c Three later oocytes. d Mature dorsal oocyte packed with yolk granules (longitudinal section). e Egg envelope: the inner thin layer made of electron-dense granular material and the outer one made of densely packed microfilaments are visible. ee egg envelope, eo early oocyte, mo mature oocyte, sd sperm duct. Scale bars a d = 8 μm; e = 1 μm

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