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Fig. 3 | BMC Biology

Fig. 3

From: High-precision morphology: bifocal 4D-microscopy enables the comparison of detailed cell lineages of two chordate species separated for more than 525 million years

Fig. 3

To the left the ascidian embryo at 235 min post fertilization (pf) consists of 64 cells. To the right the larvacean embryo at 80 min pf consists of 30 cells. The individual cells in each column are named and marked red in the respective schematic representation. Upper row: schematic representation of embryo at the late blastula stage in lateral view from the right side, anterior is to the right of the image. Middle row: differential interference contrast images marking the nucleus of the respective cell, in vegetal view, anterior is to the right of the images. Lines mark cell movement to the next generation of cells, i.e., to the next mitosis until the following one. Lower row: same images as in the upper row, but with the movement as described for the middle row overlain. This lateral view maximizes the relative visible movements of the cells. Graph below images: Movement profile of individual cells at the onset of gastrulation. Relative distances are indicated as measured directly from lower row of images. Measured distances are distances moved along the animal–vegetal axis from start to end of lines shown in middle row. Axis orientation label: a anterior, a n animal, l left, p posterior, r right, v vegetal

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