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. Author manuscript; available in PMC: 2017 Feb 23.
Published in final edited form as: Wiley Interdiscip Rev Dev Biol. 2011 Nov 17;1(1):16–39. doi: 10.1002/wdev.3

Figure 11. Mechanisms of gastrulation in Drosophila, Tribolium, and Nasonia.

Figure 11

A-A”: Gastrulation by furrow formation employed by Drosophila, and Tribolium in the anterior segments. B-B”: Gastrulation mode found in the segments deriving from the growth zone of Tribolium. A multilayered mass of cells loses its epithelial character and is internalized by the migration of the lateral ectodermal cells. C-C”: Hymenopteran mode of gastrulation, where the mesoderm forms a stiff plate, the ectoderm breaks contact with mesoderm and migrates ventrally until the free edges meet and fuse at the ventral midline. Blue= lateral ectoderm, Green=mesectoderm, Red= mesoderm precursors expressing twist, Pink= mesoderm precursors not expressing twist. Other cell fates have been omitted for clarity.