Penney Micheal posted an update in the group Animal 5 years, 12 months ago
Aside From The Existing Jawless Vertebrate, The Lamprey, An Extinct Monitor Lizard Called Saniwa Ensidens, Which Lived About 49 Mya, Has Been Discovered To Be The First Jawed Vertebrate To Have 4 Eyes. The Extra 2 Eyes, On The Head, Function As Light Sensors, And Also Help With Geo-Orientation, And Circadian And Annual Cycles.
Here's Why an Ancient Lizard Had 4 EyesThis ancient lizard could see with four eyes.