Head: Like all ceratopsians

The exact reasons for their extinction are not completely clear

Mediana: 86 mm Al

a powerful "thagomizer" composed of pairs of long caudal spines

which included fish

Allosaurus fragilis gallimimus Head: Like all ceratopsiansAllosaurus (A. fragilis, `Different Lizard) was the most common predatory theropod of the Kimmeridgian and Titionian Ages of the Late Jurassic and also the most dangerous. The Allosaurus had a large and robust head with serrated, sharp and curved teeth of between 5 10 cm, which allowed it to tear the flesh of its prey. It also had muscular three fingered arms with claws up to 15 cm long, which helped it hold on to its prey. Its tail was long and