Some Well Known Dinosaur Groups

Some Well Known Dinosaur Groups - Group Pachycephalosaur...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Group Sister Group Relat ionsh ips Location Age Genera l Diet Locomotion Social Behav ior Uniting Charecteristics Size Pachycephalosa ur Ceratopsians Ornit hiscia ns Geno saurs Cera poda ns Marg inoce phali ans North America and Eurasia Early- Late Cretaceo us Long hind limbs, very short front limbs, short neck, long trunk, long tail, transve rse process es of tail vertebr ae Herbivores Chewing Minimal Digestion took place in very large hind gut Suggested Bipedal But we don’t know what the foot looked like Head- butt Sexua l Dimor phism in the Dome s Ossified Tendons Elongated Sacral Ribs Sma ll to med ium Ceratopsians Pachycephalosau rs Ornit hiscia ns Geno saurs Cera poda ns Northern Hemisphere Continents (North America and Eurasia) Mostly a Cretaceo us Group Frill and Horn arange ments Herbivores Chewing and Slicing Jaw closing muscles attached to frills Well-Dev Dental Batteries Max. speeds= 20-50 km/hr Slow Progressio n Normally Most likely Quadraped Horns and Frills could have been used for Defen se, Rostral Bone (Beak Bone) Narrow Beak (Narrow Skull in mouth region) Flaring Skull in cheek region Sma ll to Med ium
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Marg inoce phali ans Selective Feeders Did not have a very large gut so they did not rely as much on chemical breakdown of food al But argued
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This test prep was uploaded on 04/22/2008 for the course GEOL 111 taught by Professor Getty during the Fall '07 term at UConn.

Page1 / 8

Some Well Known Dinosaur Groups - Group Pachycephalosaur...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online