Viriosaurus rex

The Viriosaurus rex was a carnivorous dinosaur species native to the Delta Quadrant. The Voth trained Viriosaurs as soldiers and installed cybernetic implants in their bodies. These were called bio-engineered Viriosaurus rex. The Viriosaurus rex bodyplan was reminiscent of that of the Tyrannosaurus rex. The Viriosaurus was as large as a three-story building and sported green skin. 

Bio-engineered Viriosaurus rex
The Voth bred and trained several types of dinosaurs to use as shock troops. The bio-engineered Viriosaurus rex sported an antiproton directed energy weapon emitter on each side of its jaw. Mortars were mounted on the spine. Body armor covered parts of the body. The Viriosaurus rex could easily withstand a barrage of weapons fire of any sort. It was the largest dinosaur in the Voth army, outmatching the Furiadon and the Dankanasaur. 

History
When the United Federation of Planets, the Klingon Empire and the Romulan Republic allied to fight against the Voth for the supremacy of the Solanae Dyson Sphere in the year 2409, the Voth unleashed bio-engineered dinosaurs on the battlefields to assist their own troops. The Alpha Quadrant powers were surprised to encounter living, breathing dinosaurs. In the central spire of the contested zone, three Viriosaurus rex guarded the Omega particle silos against the Alpha Quadrant Alliance teams. The Allies marked their maps of the area with an insignia to mark the location of the Viriosaurs.