FLYING REPTILES—PTEROSAURS
| GROUP | AGE | TEETH | TAIL | HEAD | SIZE | EXAMPLE |
|---|---|---|---|---|---|---|
| RHAMPHORHYNCHOIDS | [JURASSIC] | WELL DEVELOPED | LONG TAIL WITH FLATTENED RUDDER AT END | WITHOUT CREST | SMALL MAXIMUM WINGSPAN OF 2 FEET | RHAMPHORHYNCHUS |
| PTERODACTYLOIDS | JURASSIC AND [CRETACEOUS] | JAW PARTLY OR COMPLETELY TOOTHLESS, HORNEY BEAK | SHORT OR NO TAIL | WITH SMALL OR LARGE CREST | FROM SIZE OF SPARROW TO GIANTS WITH SPAN OF 25′ | PTERANODON-K |
[MESOZOIC] SWIMMING REPTILES
| GROUP | AGE | DESCRIPTION | SIZE | [HABITAT] | EXAMPLE |
|---|---|---|---|---|---|
| ICHTHYOSAUR | [TRIASSIC] TO [CRETACEOUS] | FISH-LIKE BODY, HEAD LONG AND POINTED, NO DISTINCT NECK | AVERAGE LENGTH = 7′ MAXIMUM LENGTH = 43′ | MARINE | ICHTHYOSAURUS-J |
| MOSASAUR | CRETACEOUS | LIZARD-LIKE BODY, FLATTENED TAIL, DOUBLE-JOINTED JAW, RECURVED TEETH | AVERAGE LENGTH = 15′-20′ MAXIMUM LENGTH = 50′ | MARINE | PYLOSAURUS |
| PLESIOSAUR | TRIASSIC TO CRETACEOUS | LONG NECK AND SMALL HEAD OR LONG HEAD AND SHORT NECK, POWERFUL FLIPPERS | MAXIMUM LENGTH = 50′ | MARINE | ELASMOSAURUS-K TRINACROMERUM-K |
| CHELONIA (TURTLES) | TRIASSIC TO PRESENT | SHAPED LIKE MODERN TURTLES, BODY COVERED WITH BONY PLATES | MAXIMUM SIZE = 11′ × 12′ | MARINE, STREAMS, AND TERRESTRIAL | ARCHELON-K |
| PHYTOSAUR | TRIASSIC | CROCODILE-LIKE BODY, NOSTRILS ON A “HUMP” ALMOST BETWEEN THE EYES | MAXIMUM LENGTH = 25′ | STREAMS AND SWAMPS | RUTIODON |
Plate 40
PELYCOSAUR × ¹/₁₂ DIMETRODON PRIMITIVE AMPHIBIAN × ¹/₂₀ ERYOPS COTYLOSAUR SEYMOURIA × ⅕
Plate 41
SWIMMING REPTILES
