The basal Sphenacodontia: Systematic revision and evolutionary implications

F. Spinder

2015

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Taxonomy:

• Ianthasaurus belongs to Edaphosauridae - Spinder (2015)
• Hypselohaptodus belongs to Haptodontiformes - Spinder (2015)
• Sphenacomorpha belongs to Eupelycosauria - Spinder (2015)