Additional file 9: Movie 9.

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Neoblast-like cells migrating along the nerve cord of a regenerating annelid worm (magnified view). Detail of Movie 8 showing a magnified view of the movement of neoblast-like slider cells on the dorsal surface of the nerve cord in a posteriorly regenerating annelid, Pristina leidyi. Green arrowheads highlight cell movement towards the posterior of the animal, while magenta arrowheads highlight cell movement towards the anterior. Alternative link: https://youtu.be/zOl8SZVD3sw. (MP4 802 kb)