Term
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Definition
Name means “margin head”
Sister group to Ornithopoda
Most live during the Cretaceous (Only one from Jurassic)
Well-known (many complete skeletons) |
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Term
| Diagnosis of Marginocephalia |
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Definition
Shelf of bone extending back over occipital portion of skull
Shortened pubis
Widely-spaced acetabula (hip sockets) |
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Term
| Shelf of bone extending back over occipital portion of skull |
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Definition
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Term
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Definition
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Term
Pachycephalosauria
Divided into two clades, which are? |
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Definition
"Bone heads"
Homocephalidae
and
Pachycephalosauridae |
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Term
| (Pachycephalosauria) Homocephalidae |
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Definition
Generally small
Flat, very bony heads
(Includes:
Micropachycephalosaurus
One of the smallest dinosaurs
One of the longest dinosaur names ) |
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Term
| (Pachycephalosauria) Pachycephalosauridae |
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Definition
Domed heads
Extremely thick, boney skull |
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Term
|
Definition
keratinous beak
frill formed by parietals
triangular shaped skull (when viewed dorsally)
high palate |
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Term
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Definition
| Parrot-like, toothless beak |
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