Mesozoic Earth ] Back | Next >

Location
 Montana, USA
 72 million years ago

Mean atmospheric O2
 150% of modern level

Mean atmospheric CO2
 6x pre-industrial level

Mean temperature
 4C above modern level

Mesozoic Earth - A Einiosaurus wanders a Cretaceous forest 72 million years ago in what is today northwestern Montana; herbivores; cerapods; ceratopsidae; ceratopsids; Mesozoic; Cretaceous; Campanian stage - Natural History Illustration Geologic Time Scale

 Era: Mesozoic
  Period: Cretaceous
   Epoch: Late
    Age: Campanian

     
 

Einiosaurus portrait

A two ton, 20-foot-long centrosaurine ceratopsian dinosaur of the genus Einiosaurus wanders a Cretaceous forest 72 million years ago in what is today northwestern Montana. Einiosaurus is believed to have had a low, strongly forward-curving nasal horn resembling a can opener and a pair of large spikes atop a relatively small frill.

Like the better known Triceratops, Einiosaurus was a Ceratopsid, a family of large four-legged plant-eating dinosaurs characterized by beaks, rows of shearing teeth in the back of the jaw, and elaborate horns and frills. While they resemble defensive shields, the frills are in fact relatively fragile, suggesting that they may have served a purpose other than protecting against a brute force attack. One possibility is that the frills were employed as visual displays in order to intimidate rivals and attract the opposite sex.

 

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Copyright Walter B. Myers. All rights reserved.

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