Geosternbergia sternbergi was a large Cretaceous pterosaur. It was sexually dimorphic, with the crests of males being far larger than those of females. Their crests also indicated age, depending on the size. Males of this species were about one and a half times larger than the females, though the females were twice as common. This suggests that the males could have gathered harems or groups of females instead of pairing with a single female, like sea lions.

  1. curlyhorns reblogged this from thethreehares
  2. rolanddagget reblogged this from lostbeasts
  3. fugaciouss reblogged this from somuchscience
  4. dreamsindinosaurs reblogged this from lostbeasts
  5. vanesa reblogged this from scientificillustration
  6. dead-air-until-further-notice reblogged this from scientificillustration
  7. stirredupbuttercup reblogged this from scientificillustration
  8. fishstickmonkey reblogged this from scientificillustration
  9. freekof-freeks reblogged this from scientificillustration
  10. amysaurus reblogged this from scientificillustration
  11. theangusburger26 reblogged this from scientificillustration
  12. trashymommarocks reblogged this from scientificillustration
  13. two4two reblogged this from scientificillustration
  14. a-cephalopod-army reblogged this from scientificillustration
  15. old-king-coal reblogged this from scientificillustration
  16. lucifers-cuvette reblogged this from scientificillustration