Ultraman Wiki
Ultraman Wiki

Dimetrodon (ディメトロドン Dimetorodon) were common synapsids/stem-mammals in the series, Dinosaur Squadron Koseidon.


Dinosaur Squadron Koseidon

The first appearance of a Dimetrodon would be a hatchling that was protected by the Koseidon Corps against Sigma-1. The individual that hatched was named Jirou, and would come back every once in a while to help the corps. It is believed that Jirou did not become the Killer Dinosaur individual.

When the evil aliens came to Prehistoric Earth, they needed foot soldiers, and what better warriors than Dinosaurs? The Dimetrodon was one of the first to get possessed by the alien mind control. It was killed, unlike the T-rex.

Many other Dimetrodons where seen throughout the series, and during the series finale where a meteor was plumeting to earth, killing all the prehistoric animals.


  • The Dimetrodon suit is one of the many new suits created for Koseidon.
  • Dimetrodon, along with few other dinosaurs/prehistoric creatures, were used by villains to become monsters or get killed.
  • Despite being labeled as a "dinosaur", the Dimetrodon is actually more related to mammals.
  • Dimetrodon existed way before the time of dinosaurs.


  • Height: Varies
  • Weight: Varies
Powers and Weapons
  • Great Strength: Dimetrodon (killer dinosaur individual) is strong enough to fight back Koseidon Corps members.


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 | Shogun Kenoch | Shogun Gaban | Sigma-1 | Destron | Galias | Gomer Corps Commander | Gibra | Gibras | Piragia | Kinokong | Magma Person | Grandon | Baribaa | Eredon | Dr. Ogimura | Gigi | Dr. Sabata | Cyborg S1 | Alien Mosgis | Cyborg K2 | Alien Dakiron | 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 Holost | Nishiyama | Cyborg | Alien Yapu | Aliens | Ragout | Satar | Dr. Munakata | Professor Kisaragi | Bemgan | Kiska | Robot Weapon Nova