Term
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Definition
| Tri Radiate Pelvis, no predentary bone |
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Term
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Definition
| herbivorous, tall rake like teeth, rigid mandible, long neck |
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Term
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Definition
| Double Roller Joint Ankle, long I II III digits, long scapula |
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Term
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Definition
| twisted knife like thumb, facultative bipeds, small delicate skull, blade like teeth |
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Term
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Definition
| columnar limbs, obligate quadrupeds, wrinkled tooth enamel |
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Term
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Definition
| pre antorbital fenestra, closed external mandibular fenestra |
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Term
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Definition
| external nares above eye sockets, Y shaped neural spines on neck/trunk vertebrae |
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Term
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Definition
| posterior neck neural spines have transversely flared ends |
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Term
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Definition
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Term
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Definition
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Term
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Definition
| stocky limbs, no carpals or phalanges |
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Term
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Definition
| Every meat eating dino. Very light, hollow bones, joint in middle of mandible |
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Term
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Definition
| Only 2 sacral vertebrae, lacks elaborate craniofacial spaces |
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Term
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Definition
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Term
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Definition
| flexible tail, sexually dimorphic femur |
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Term
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Definition
| upper tooth row short and forward, tail evolves towards rigidity |
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Term
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Definition
| no rigid tail, semi lunate carpal, conical teeth |
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Term
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Definition
| rigid tail, semi lunate carpal |
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Term
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Definition
| articular bone with ventral projection |
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Term
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Definition
| long sacrum with 6 vertebrae |
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Term
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Definition
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Term
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Definition
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Term
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Definition
| small head, small teeth, long hands. Not bird ancestors. |
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Term
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Definition
| Giant ground sloth-like. Huge arms |
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Term
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Definition
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Term
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Definition
| teeny parietal fenestra separation bone |
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Term
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Definition
| Pinched 3rd metatarsal, stabbing/crushing teeth |
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Term
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Definition
| curved ulna, veined feathers |
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Term
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Definition
| beak, modern bird skull, no teeth |
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Term
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Definition
| Almost birds. Shortened torso, very stiff tail |
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Term
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Definition
| sickle shaped ungual on foot digit II |
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Term
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Definition
| Intelligent for a dinosaur, moderately large 2nd ungual |
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Term
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Definition
| rigid tail, very long sickled digit II |
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Term
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Definition
| Snout elongated anterior to nares, reversed I foot digit |
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Term
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Definition
| Boomerang shaped fercula (wishbone), retains long hands |
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Term
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Definition
| "opposite birds", leg bones fuse at opposite end. large curved pedal claws for tree perching, Mesozoic only |
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Term
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Definition
| Modern birds. Not common in the Cretaceous, shorter tail than Enantiornithes. |
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Term
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Definition
| Herbivores only, rod shaped pubis bone, bill covered predentary |
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Term
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Definition
| medially inset crude slicing upper teeth, quadrupedal, lateral row of dorsal scutes |
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Term
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Definition
| prominant row of plates grading posterierally into spines |
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Term
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Definition
| 2 rows of large plates over neck region |
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Term
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Definition
| no body armor, very mobile and pack living, significant diastema between premaxillary and maxillary teeth. Thicker enamel on inner side of dentary teeth to retain sharpness over time. |
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Term
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Definition
| premaxillary teeth offset ventral to maxillary teeth |
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Term
| Plesion Heterodontosaurus |
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Definition
| Differentiated canine and molar teeth |
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Term
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Definition
| long anterior extension of pubis bone |
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Term
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Definition
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Term
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Definition
| parietal squamosal shelf, projecting jugal bones |
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Term
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Definition
| thickened skull dome, reinforced neck, bigedal, small parietal squamosal shelf, skullcap has vessels |
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Term
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Definition
| larger parietal squamosal shelf, bipedal or quadrupedal |
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Term
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Definition
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Definition
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