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| Grazing section through an accumulation of uncoated cupulas in the process of attachment to and fusion with a food vacuole membrane. The small round pores (arrows) apparently represent early stages of fusion of cupulas with the food vacuole membrane. EM taken on 3/7/72 by R. Allen with Hitachi HU11A TEM. Neg. 19,500X. Bar = 0.5µm. |
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