Figure 4 in Gonads and gametogenesis in Chaetodactylus osmiae (Acariformes: Astigmata: Chaetodactylidae) a parasite of solitary bees

Figure 4 Chaetodactylus osmiaefemale. TEM. (A) Advanced previtellogenic oocyte showing nucleus (n) with nucleolus (nu). The nuclear envelope has concavities in sites rich in pores, with adhering nuage material (asterisk). Mitochondria (m) are grouped around the nucleus. Another oocyte sectioned tangentially (po) is also present. In the stroma cell (SC), an arrow marks a conspicuous ER cisterna. (B) Enlarged fragment of the oocyte marked in (A): note nucleus (n), a Golgi body (Gb), nuage (asterisks) and mitochondria (m). Note the different appearance of nuage material which is not granular as in the nutritive cell and early oocytes (compare with 2B and 3A-B).. (C) A gap between a nutritive