pachycephalosauria

Goyocephale
Micropachycephalosaurus
Homalocephaloidea
Homalocephale
Pachycephalosauridae
Pachycephalosauria is a group of ornithischian dinosaurs which evolved during the Cretaceous period in what is now North America and Asia. They were all bipedal herbivorous animals with very thick skulls, sometimes ridged with small to large tubercles and spikes. Initial speculation about the purpose of the reinforced skulls centered on mating disputes and intra-species "head-butting", but recent modeling and simulations show that head on collisions would most likely result in severe injury to the animal under these conditions (broken necks). The skulls were most likely a defense mechanism used against ramming predators. Species include Pachycephalosaurus and Stegoceras

<< Previous

Word Browser

Next >>

holy fire
wang xiangzhai
naked bike
palermo (disambiguation)
desert rat kangaroo
william halse rivers rivers
passenger services act
john boxall
larry o'connor
culture of hawaii
nuo beltrn de guzmn

the sims (consoles)
wally feurzeig
fallow (album)
the colour of pomegranates
princess
memory prosthesis
william swain lee (politician)
woolsey hall
yu gi oh! the falsebound kingdom
maritime union
hms sheffield (c24)

gunning, new south wales
numbers game
john keith avery
ladakh scouts
max rayne
nightwatch (1997 movie)
aerosonde
hamnuna
jane lomax smith
columbine redemption
newberry memorial organ

eric willis
number pooling
cabotage
raw feeding
ron white
hellespontine sibyl
john means
campbell conference
etruscan sibyl
usda plant hardiness zone
moravia (disambiguation)