Plionictis oaxacaensis was named by Ferrusquia-Villafranca (1990) [Type locality is 18722]. Its type specimen is IGM 3977, a mandible (associated right and left mandibular rami bearing Rln, C, Pn, and Mn; LP3, and Mn; plus these isolated teeth: LC; Rand LC, RP2, RP3, Rand Lp4 and 1IM1. ), and it is a 3D body fossil.