In 2266, the USS Enterprise launched its all-terrain shuttlecrawler Space Bug X-4 to explore the surface of Coltac. James T. Kirk sought Coltac herbs that were key to developing an antidote to a creeping sickness plague.
The landing party was forced to use phasers to stun a massive, bipedal, horned dinosaur whose head was as large as the shuttle. This animal easily uprooted trees more than 12-feet thick. Later, a pterosaur dive-bombed the shuttle as the crew were collecting herb samples, but Kirk was able to keep the animal at bay with his phaser until the team could take off. (TOS comic: "Target: Zargot")