PELYCOSAURS (DIMETRODON)
NRJ
(EDAPHOSAURUS) 280 MILLION B.C.
Obverse script
Latin
Reverse description
Reverse lettering
`WHEN THE WORLD WAS YOUNG`
CEROTOPSIANS
(MONOCLONIUS)
ORNITHOPODS
(CORYTHOSAURUS)
THEROPODS
(ALLOSAURUS)
ANKYLOSAURS
(PALAEOSCHIUS)
135 MILLION B.C.
SAUROPODS
(DIPLODOCUS)
STEGOSAURS
(STEGOSAURUS)
ORNITHISCHIANS
SAURISCHIANS
180 MILLION B.C.
THECODONTS
DINOSAURS FAMILY TREE
