Pachycephalosaurus

Pachycephalosaurus wyomingensis

Pachycephalosaurus had the thickest skull of any dinosaur, with a dome of solid bone up to 25 cm thick. Debate continues whether it used its dome for head-butting or flank-butting. It was the largest known pachycephalosaur.

Physical Description

Measurement	Value	Human Scale
الطول	4.5 m	roughly the length of a large SUV
Height	1.8 m	—
الوزن	450 kg	about 6 adult humans

Diet & Feeding

Herbivore

Pachycephalosaurus was a plant-eating dinosaur. Herbivores typically fed on ferns, cycads, conifers, and other vegetation available during their era. Many herbivorous dinosaurs developed specialized teeth and digestive systems for processing tough plant material.

Time Period

Cretaceous Late Mesozoic Era

Pachycephalosaurus lived during the Cretaceous Late period of the Mesozoic Era, approximately 100,5 to 66,0 million years ago.

The final age of dinosaurs, featuring iconic species like Tyrannosaurus rex, Triceratops, and Velociraptor. Dinosaurs reached their peak diversity before the catastrophic asteroid impact at the Chicxulub crater ended the Mesozoic Era.

Discovery & Naming

سُمي بواسطة	Barnum Brown & Erich Schlaikjer
سنة الاكتشاف	1943
موقع الاكتشاف	Montana, USA

التصنيف

Dinosauria → Ornithischia → Pachycephalosauria → Pachycephalosaurus

Thick-headed lizards

Bipedal herbivorous dinosaurs with thick dome-shaped skulls. The thickened skull roof may have been used in head-butting contests or species recognition displays.

Size Comparison

At 4,5 meters long and 450,0 kg, Pachycephalosaurus was roughly the length of a large SUV and about 6 adult humans.

Other dinosaurs from the same period:

Abelisaurus comahuensis Adasaurus mongoliensis Adynomosaurus arcanus Byronosaurus Byronosaurus jaffei Caenagnathasia

Quick Facts

التصنيف	Pachycephalosauria
الحقبة الجيولوجية	Cretaceous Late
النظام الغذائي	Herbivore
الحجم	4.5m long, 1.8m tall, 450.0kg