 Juveniles of Stegosaurus have been preserved , probably showing the growth of the genus . Kentrosaurus is also known from juvenile specimens , and they can be identified as different genders . The two juveniles are both relatively small , with the smaller individual being 1 @.@ 5 m ( 4 @.@ 9 ft ) long , and the larger having a length of 2 @.@ 6 m ( 8 @.@ 5 ft ) . The specimens can be identified as not mature because they lack the fusion of the scapula and coracoid , and the lower hind limbs . Also , the pelvic region of the specimens are similar to Kentrosaurus juveniles . 
