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taxonomy
Argentina
2
Cretaceous
2
Patagonia
2
South America
2
mammal
2
morphology
2
paleontology
2
Campanian
1
Cretaceous/palaeogene boundary
1
Jurassic
1
Late Cretaceous
1
Laurentia
1
Los Alamitos Formation
1
Mammaliaformes
1
Meridiolestida
1
New Zealand
1
Opisthodontia
1
Palaeocene
1
Paleocene
1
Paleogene
1
Rhynchocephalia
1
Triconodonts
1
body shape
1
body size
1
cladistics
1
dentition
1
ectothermy
1
extinction
1
fossil record
1
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1
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2
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3