 Stegosaurus stenops , meaning " narrow @-@ faced roof lizard " , was named by Marsh in 1887 , with the holotype having been collected by Marshal Felch at Garden Park , north of Cañon City , Colorado , in 1886 . This is the best @-@ known species of Stegosaurus , mainly because its remains include at least one complete articulated skeleton . It had proportionately large , broad plates and rounded tail plates . Articulated specimens show that the plates were arranged alternating in a staggered double row . S. stenops is known from at least 50 partial skeletons of adults and juveniles , one complete skull , and four partial skulls . It was shorter than other species , at 7 m ( 23 ft ) . Found in the Morrison Formation , Colorado , Wyoming , and Utah . 
