Kretzoiarctos gen. nov., the oldest member of the giant panda clade

MNCN-CSIC NV-2-42, NV-2-40 and IPS 46473 document a middle Miocene Spanish ursid dental sample recovered within Ailuropodinae in the published matrix; diet and biogeographic origin remain comparative interpretations.

Kretzoiarctos beatrix is bounded by Spanish dental specimens including holotype P4 MNCN-CSIC NV-2-42 within an approximately 11.8–11.2 Ma sample envelope; its ailuropodine placement does not make it a direct giant-panda ancestor or global family first.

A published fossil-plus-living ursid morphology matrix recovers Kretzoiarctos within Ailuropodinae, but internal ailuropodine clades are unresolved in its majority-rule bootstrap tree.

Kretzoiarctos is represented in the study by Nombrevilla 2 and ACM/C6-Camí in Spain; these two Iberian localities do not demonstrate a secure centre of origin or a complete distribution.

The study identifies left P4 NV-2-42, right M1 NV-2-40 and partial mandible IPS 46473 with associated P4 as Kretzoiarctos material.

The paper interprets dental features as a tendency toward a more herbivorous diet, but the dental sample does not directly observe feeding, habitat, locomotion or a population-wide ecological guild.