THE STEGOSAURIAN DINOSAURS
Middle to late Jurassic
Dacentrurus was one of the earliest stegosaurs. It is
only known form odd bones in England, France and Portugal, sa a
restoration cannot be given. Dacentrurus had paired spines on its
back, but probably no plates. Some of the specimens show close
similarities with stegosarus.
Dravidosaurus is the last known stegosaur. Most
stegosaur like stegosaurus and kentrosaurus, lived during the
late Jurassic, so that there is a span of milions of years
between these and Drvidosarus. Dravidosarus had no armor of
plates on its back, and strange spines which bulged hlafway up.
It was named in 1979.
Kentrosaurus was a large plated dinosaur, about 16.5ft
(5m) long. Some good skeletons were collected at the famous
Tendaguru site in Tanzania. It was rather like stegosaurus, which
lived in North America at the same time,expect that Kentrosaurus
had more primitive armor like that of lexovisaurus. It had
trianglar plates on the neck and shoulders, and spines on the
Lexovi (ancien tribe) reptiles
England and France
Lexovisaurus is one of the oldest known stegosaurs. We
know about it from piexecs of armor and limb bones unearthed in
England and northern France. The French specimens show that
Lexovisaurus was probably rather like kentrosaurus. Its armor was
a selection of flat plates and round pointed spines that ran
along the back and tail. There was a pair of very long spines
that ran alnog the back and tail. There was a pair of very long
spines over the hips. Lexovisaurus was probably about 1625ft (5m)
Scelidosaurus is a strange and early armored dinosaur.
It was named from a collection of leg bones and a partial skull.
Later it has been shown that the leg bones belonged to another
animal megalosaurus. Some skeletons of Scelidosaurus
have been found around 1980s. Scelidosaurus had a small
head with leaflike ridged teeth and four strong legs. Its body
was armored with bony knobs and spikes.
Early Jurrasic to Late Cratecous
Stegosaurus was named in 1877 from an incomplete
skeleton discovered in Colorado, USA. Stegosaurus had a
tiny tubular skull with a brain the size of a walnut. Its teeth
were small, blunt, and leaflike. Stegosaurus had four long
spines. It had very short front legs, about half the length of
its hind legs. Stegosaurus was up to 30ft. (9m) long.