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Figure 3 | Frontiers in Zoology

Figure 3

From: Development and juvenile anatomy of the nemertodermatid Meara stichopi (Bock) Westblad 1949 (Acoelomorpha)

Figure 3

Timing of the cell divisions of an embryo of M. stichopi up to the 50-cell stage. Cell divisions of a single embryo recorded with time-lapse microscopy. The lineage of the vegetal blastomeres indicated with dark blue and dark red branches, the animal blastomeres in light blue and orange branches. The duration of the cell cycle increases during the course of development from 24 hours to 3 days. A-E) Fertilized egg and cleavage stages imaged with Nomarski optics. A) Fertilized egg with egg shell, B) 2-cell stage. C) 4-cell stage, D) 8-cell stage E) 16-cell stage, A-E, same embryo. F) different embryo in a 48-cell stage. Scale bar: 30 μm.

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