Multi-dimensional marine organisms dataviewer

Close-up of a fragment of isolated cortex from an unfertilized egg of the ascidian Phallusia mammillata.

Just fertilized egg of the ascidian Phallusia mammillata (left) and corresponding vegetal pole cortex (right).

Gastrulation seen from the vegetal pole

110 cell stage seen from the animal pole

110 cell stage seen from the vegetal pole

64 cell stage

32 cell stage

Fertilized egg 5 minutes after sperm entry

16 cell stage

Phallusia and Paracentrotus embryos

First cleavage 45 minutes after fertilization.

Fertilized egg 5 minutes after sperm entry

Fertilization triggers a microfilament-driven contraction.

The vegetal /contraction pole 10 minutes after fertilization

The egg of the ascidian Phallusia mammillata before fertilization

Phallusia embryo (16-cell stage during mitosis, vegetal view, posterior at bottom)

Phallusia tadpole head

Phallusia embryo (64-cell stage during interphase, vegetal view, posterior on top)

Spindle rotation and mitochondria segregation in NN cells

Phallusia mammillata gastrula (microtubule+DNA)

Isolated B52 blastomeres