Missilocephaloidea

Order of pressionatatian amphibians of the arctic.
Characterized by the large pressure jet and specialized armour.
Divided into two families: -The Missilicephalidae, with the sharp and projectile shaped armour, made to impact against the ice in precise strikes
-The Sphyroceèhalidae, with the large and blunt armour made for large scale impacts against the icy surface or to ram other animals.