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Figure 9 | Frontiers in Zoology

Figure 9

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

Figure 9

Schematic drawings of the comparisons of early acoelomorph embryos up to the 16-cell stage. Comparison between the development up to the 16-cell stage between the nemertodermatids M. stichopi A) 2-cell B) 4-cell, C) 8-cell D) 16-cell stage and previously described N. westbladi (E-F, same arrangement of the stages as for M. stichopi) and acoel embryos (I-L, same arrangement of the stages as for M. stichopi) (see discussion in the text). The 16-cell stage of N. westbladi is shaded and labeled with a question mark because it has not been documented in [22] with photographs and own observations could not confirm this blastomere arrangement. Bars connect sister blastomeres in all stages.

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