Ji, Q.; Luo, Z.-X.; Yuan, C.-X.; Wible, J.R.; Zhang, J.-P.; Georgi, J.A.
taxonomy · range · morphology · topology · ecology · biogeography
Primary description of CAGS 01-IG-1a,b; later matrices have tested alternative placements, so the original eutherian position is not treated as immutable.
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-topologyCAGS 01-IG-1a,b was recovered as basal Eutheria in the original matrix, while later combined analyses can move Eomaia outside Theria; neither result is ancestry.
claim:taxon:eomaia:taxonomyThe profile is restricted to the Yixian Formation occurrence in Liaoning and does not establish a global eutherian or therian origin area.
claim:taxon:eomaia:biogeographyDentition and limb proportions support faunivorous and scansorial interpretations, while feeding and locomotor behaviour were not directly observed.
claim:taxon:eomaia:ecologyThe articulated holotype preserves skull, dentition, much of the postcranium, feet and claws used in anatomical and phylogenetic comparisons.
claim:taxon:eomaia:morphologyThe 125.8–124.1 Ma envelope is the Yixian sample context, not a universal therian FAD, eutherian calibration or direct specimen date.
claim:taxon:eomaia:fossil-rangeTherian boundary evidence is an atlas navigation route spanning separately sampled Juramaia, Eomaia and Ambolestes records from approximately 161–124.1 Ma; it is not a taxonomic clade, continuous lineage or ancestor sequence, and its older endpoint inherits the disputed Juramaia provenance.
claim:taxon:therian-boundary-evidence:route-boundary