frontal-cortex:

Fourth stage of Parhyale germband elongation
The amphipod crustacean Parhyale hawaiensis has germband formation that is different from the long-germ type of Drosophila. Germband formation in Parhyale is sequential like in short-germ insects. On the fourth stage, the intersegmental furrows become visible.

Matthias Gerberding

(via scinerds)