Part III Introduction Outline
CHARACTERISTICS OF SAURISCHIA
- ALL SAURISCHIA
- 1 - SUBNARIAL FORAMEN (AN OPENING BENEATH THE NOSTRIL AREA)
- 2 - ELONGATION OF THE REARWARD NECK VERTEBRAE (GIVING A LONGER NECK)
- 3 - DEVELOPMENT OF ACCESSORY ARTICULATIONS BETWEEN THE VERTEBRAE
- 4 - A LARGE THUMB SUPPORTED BY A VERY BROAD FIRST METACARPAL BONE
- 5 - A WEDGE-SHAPED SPLINT OF BONE ON THE ANKLE BONE (ASTRAGALUS) THAT
LIES FLAT AGAINST THE SHIN BONE AND POINTS UPWARD [ASCENDING PROCESS OF
THE ASTRAGALUS]
- SAUROPODOMORPHA (CHAPTER 11)
- CLADE CONTAINING MOST PLANT-EATING MEMBERS OF SAURISCHIA & INCLUDING
THE LARGEST DINOSAURS
- THEROPODA (CHAPTERS 12 & 13)
- CLADE CONTAINING ALL MEAT-EATING MEMBERS OF SAURISCHIA & INCLUDING
THE SMALLEST DINOSAURS
- SEGNOSAURIA
- CLADE CONTAINING SEVERAL ABERRANT, BIPEDAL PLANT-EATING MEMBERS OF
THEROPODA, INCLUDING SEGNOSAURUS , ERLIKOSAURUS , ENIGMOSAURUS
, ALXASAURUS , THERIZINOSAURUS & ONE OTHER GENUS
- 1 - SIX SACRAL VERTEBRAE
- 2 - BROAD HIPS
- 3 - AN UNUSUAL ILIUM
- 4 - A RETROVERTED PUBIS
- SKELETAL MATERIAL IS FAIRLY SCANTY