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Taxon:
Subfamily †
Sphenacodontinae
Romer, 1936
(reptile)
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Entity:
†Sphenacodontidae (Family)
..†Dimetrodon (Genus)
..†Sphenacodon (Genus)
..†Sphenacodontinae (Subfamily)
Types
Nominotypical taxon of
:
†
Sphenacodontidae
(Family)
Marsh, 1878
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Last updated:
28 Aug 2026