Movie 5.

The T-reverse type arrangement observed in the 4-cell stage of the Cephalobus sp. embryo. DIC images of the early embryogenesis of the Cephalobus sp. embryo. Time is indicated in h:min: s from the start of imaging. The embryo is identical to that shown in Fig. S1.

The extra-embryonic space and the local contour are crucial geometric constraints regulating cell arrangement

Sungrim Seirin-Lee, Kazunori Yamamoto, and Akatsuki Kimura

Development 2022. 149:None-None; doi: 10.1242/dev.200401