Figure 2

Early and mid-stages of oogenesis in Bicellariella ciliata (TEM). A, presumed early oocyte with vesicular elements of forming endoplasmic reticulum; B, cytoplasm of the same early oocyte with yolk platelet and vesicular and annular elements of forming endoplasmic reticulum; C, part of the early oocyte surrounded by flattened follicle cells; D, beginning of microvilli formation in the oocytic doublet (follicle cell in upper left corner, border between oocytic doublet cells arrowed). Abbreviations: co, zooidal coelom; er, endoplasmic reticulum; fo, follicle cells; ga, Golgi apparatus; mi, mitochondria; mv, microvilli; nc, nurse cell; o, oocyte; p, polypide; pp, protein platelet; y, yolk granule. Scale bars: A, C, 2.0 μm, B, D, 1.0 μm.