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Stegosaurus is a dinosaur that appears in Dinosaur Squadron Koseidon.


Dinosaur Squadron Koseidon

Stegosaurus is seen foraging plants. A little girl drops her dead mom's ring, and the dinosaur accidently eats it along with plants. Later, Alien Godmes attack, causing the dinosaur to die. Later, the Koseidon Corps get a report from their boss in the 21st century, telling that a peculiar fossil of a stegosaurus that had a ring in it. It is revealed it was the girl's ring. There were a several of them living in a Dinosaur Research Center, until Alien Godmes came to kill them so they can release their new monster: Sigma-1. Much later in the series, Alien Holosto calls many dinosaurs to a machine they made to lure them in for mind controlling, and a Stegosaurus was one of them.


  • Stegosaurus's suit is a reused suit of Dinosaur Great War Izenborg's stegosaur-like kaiju.
  • It uses a stock roar commonly used in the Tsuburaya Dinosaur Trilogy series.


  • Weakness: Stegosaurus can't move quickly, which causes them to get caught in Alien Godmes attacks.
Powers and Weapons
  • Teeth: The Stegosaurus is a herbivore, eating ferns and other plants, equipped with sharp, spoon-like teeth to do so.
  • Dorsal Plates: These help them get warm, protect from predators, and find a mate. But, they can't protect the dinosaur from Alien Godmes attacks.


Dinosaur Squadron Koseidon Kaiju
Princess Altasia | Big Lagee | Futabasaurus | Pteranodon | Brontosaur | Nipponosaurus | Triceratops | Tyrannosaurus | Stegosaurus | Dimetrodon | Corythosaurus | Emperor Godmes | Alien Godmes | Commissioner Zaji | Leader Jericho | General Kesnochi | Shogun Gaban | Sigma-1 | Destron | Galias | Gomer Corps Commander | Gibra | Gibras | Killer Dinosaurs | Piragia | Kinokong | Magma Person | Grandon | Baribaa | Tyrannosaurus Jackie | Gaos | Eredon | Doctor Ogimura | Gigi | Dr. Sabata | S-1 | Alien Mosgis | Cyborg K2 | Alien Dakiron | Julie | Cosmo Plums | Cyborg B1 | Dr. Kuroiwa | Cyborg B2 | Cyborg Combatants | Dr. Kuramochi | Franken No.1 | Franken | Alien Devil Akumazy | Kishida Gounosuke | Tsumura | Cyborg Guardsmen | Doctor Dark | Phantom Shiraki | Alien Holosto | Nishiyama | Cyborg | Alien Yapu | Aliens | Ragout | Satar | Dr. Munakata | Professor Kisaragi | Bemgan | Kiska | Robot Weapon Nova