Ecdysozoa (ecdysis; no cilia for locomotion; terminal mouth)

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Cycloneuralia - Nematoda
Roundworm

Cycloneuralia - Nematomorpha
Horsehair worm

Cycloneuralia - Priapulida
 Penis worm

Cycloneuralia - Kinorhyncha
Mud dragon

Cycloneuralia - Loricifera

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Panarthropoda - Onychophora
Velvet worm

Panarthropoda - Tardigrada
Water bear