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THE LIFE THAT WAS IN THE CRETACEOUS

Along with the dinosaurs, there were many other species that were affected; while some others were hardly affected at all. The following details which species were affected and which one were not:

 

Land animals with losses/total disappearance:

Figure: Artist's rendition of a Pterosaur in flight. (Courtesy of Encarta)

 

Sea animals with losses/total disappearance:

Figure: Artist's rendition of a mosasaur (top) and Plesiosaur (bottom) in Cretaceous oceans. (Courtesy of Encarta).

   

Figure: Artist's rendition of ammonites in Cretaceous Seas. (Courtesy of Encarta).

 

Organisms that survived/had low losses:

Some species were affected greatly compared to others. This could go back to how carbonate species were nearly extinguished while the siliceous species were not affected at all. Carbonate organisms form the base of many marine ecosystems; these ecosystems fell apart after the extinction after the removal of carbonate plankton from the bottom.