Fauna
Species · GBIF taxon 4964958

Dimetrodon milleri

Dimetrodon milleri

Also known as Miller's Dimetrodon

Among the oldest and smallest known members of its lineage, Dimetrodon milleri was an active apex predator of the Early Permian floodplains. Its jaws showcased specialized heterodont dentition, boasting sharp incisors, stout stabbing canines, and serrated shearing teeth designed to dismember prey. The distinctive dorsal sail formed by elongated neural spines likely assisted in rapid thermoregulation and visual territorial displays.

FossilSynapsid
Dimetrodon milleri reference
Licensed referenceH. Zell / CC BY-SA 3.0 · cc-by-sa
—observations
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—peak records
ExtinctConservation statusIUCN Red List categoriesLCNTVUENCREWEXExtinctRed List categories, explained →
Key facts
Diet & prey
  • Temnospondyl amphibians
  • Xenacanth sharks
  • Small early tetrapods
Predators
  • Larger sphenacodontids
ThreatsEnvironmental aridification and habitat loss during the Early Permian
HabitatsPermian river floodplains, swamp margins, and deltaic lowlands
Life spanApproximately 15–25 years
Classification
  1. FamilySphenacodontidae
  2. SpeciesDimetrodon milleri
Range & activity
Range data is not available yet.
Safe observation
Interaction riskLow
  1. Low
  2. Moderate
  3. High
  4. Very high
Why interaction risk is low
Extinct prehistoric species known only from fossil remains.
Responsible observation
  • Fossil Hunting: Search Permian red bed exposures with proper legal permits and field gear.
  • Museum Viewing: Examine fossilized jaws to observe the distinct tooth differentiation.
Related species
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