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Eomaia skeleton, topology and locomotor inference

An articulated Early Cretaceous skeleton preserves dentition, feet and claws used in competing therian matrices and locomotor interpretations.

Represented range125.8–124.1 Ma
RegionsYixian Formation, Jianchang, Liaoning, China
CladesEomaia scansoria · Theria · Eutheria

Claim ledger

topology · medium

CAGS 01-IG-1a,b preserves an articulated skeleton with dentition, feet and claws; the original matrix placed Eomaia near the eutherian root and inferred scansoriality, while later combined matrices can place it outside Theria, so neither topology nor locomotor habit is a directly observed ancestral state.

claim:event:eomaia-holotype-topology

References

  1. The earliest known eutherian mammalJi, Q.; Luo, Z.-X.; Yuan, C.-X.; Wible, J.R.; Zhang, J.-P.; Georgi, J.A. · 2002 · DOI 10.1038/416816a
  2. The placental mammal ancestor and the post–K–Pg radiation of placentalsO'Leary, M.A. et al. · 2013 · DOI 10.1126/science.1229237
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