This preview shows page 1. Sign up to view the full content.
Unformatted text preview: -Lower f-numbers mean nocturnal or have large eyes Sauropterygians-Placodus: flat teeth; shell eaters; unlikely gave rise to turtles-Second part of sauro were different, had long necks; gave rise to plesiosaurs-Elasmosaurs: 10 m necks Mosasaurs-Came from squamates-Related to lizards and snakes-Plotosaurus: mosasaur from fresno county, CA-Globidens: globial tooth, shell eaters Thalattosaurs-Strange proportion of tail to body (really long tail)-Some shell eaters (round teeth), some fish eaters-Had claws, meaning they must have been hunting at bottom of ocean Sea Turtles-Early cretaceous...
View Full Document
- Spring '08