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


Cycloneuralia - Nematoda
Roundworm

Cycloneuralia - Nematomorpha
Horsehair worm

Cycloneuralia - Priapulida
 Penis worm

Cycloneuralia - Kinorhyncha
Mud dragon

Cycloneuralia - Loricifera


Panarthropoda - Onychophora
Velvet worm

Panarthropoda - Tardigrada
Water bear