The Dinosauria by DinosØMP

Stegosauria


Stegosauria
|-?Hesperosaurus mjosi
|
|-Huayangosauridae
|  |
|  |-Huayangosaurus taibaii
|
|-Stegosauridae
   |-Dacentrurus armatus
   |-Dacentrurus phillipsii
      |
      |-Kentrosaurus aethiopicus
      |-?Kentrosaurus longispinus
         |
         |-Chialingosaurus kuani
         |-Chialingosaurus guangyuanensis
         |-Chungkingosaurus jiangbeiensis
            |
            |-Stegosaurinae
               |-Lexovisaurus durobrivensis
               |-Lexovisaurus vetustus
               |-Tuojiangosaurus multispinus
               |-?Paranthodon africanus
                  |
                  |-Stegosaurini
                     |-Stegosaurus armatus
                     |-Stegosaurus stenops
                     |-Stegosaurus affinis
                     |-Stegosaurus laticeps
                     |-Wuerhosaurus homhei
                     |-Wuerhosaurus ordosensis

Stegosaurs started as basal thyerophores with enlarged scutes along the back
and spines on the tail, and evolved into forms with plates on the back, and long
spikes along the tail (Stegosauridae), and in (Stegosaurinae) the plates on the back
had moved all way down the tail, leaving only 4 - 8 spikes left, for defence. There was
allso a large spike jutting out from each shoulderblade, and the thout was covered
in small ossicles. Kentrosaurus was a rather small species, only 5 metres long,
while the huge Stegosaurus was the double size. They lived through the late
Jurassic, in North-America, Asia and Africa.