fig3

Taxa with a segmented trunk. Annelida: the holoplanktonik polychaete Tomopteris sp., Arthropoda: a mantis shrimp (Stomatopoda), Vertebrata: a Teleostei fish larva. Yellow lines mark the anterior and posterior boundary of one segment. Image on the right is a closeup of the ectodermal segmentation of the fire worm Eurythoe complanata. Images not to scale. Photos by Alvaro E. Migotto (Migotto and Vellutini, 2011).

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