Astrodon

Astrodon johnstoni was a large sauropod from the early Cretaceous period 112 mya. Astrodon was once thought to be separate from the genus pleuroceleus but it was changed in 1923. Astrodon's name means "star tooth" because of the odd shape of it's teeth. Astrodon was a small sauropod compared to others at only 15 to 18 metres long. Astrodon was the second largest sauropod of it's environment in Maryland, USA.