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- †Pteranodon)
Subclass 6. †Synapsida [pp. 370, 533]
Order 1. †Pelycosauria (= †
Theromorpha) (e.g., †Varanosaurus, †Edaphosaurus, †Dimetrodon)
Order 2. †Therapsida...
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Theromorpha" [Subclass
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