Palaeoxonodon is an extinct genus of cladotherian mammal from the Middle Jurassic of England[1] and Scotland.

[2][3] The first fossils of Palaeoxonodon ooliticus were found in the Kirtlington cement quarry, Oxfordshire, England.

[1] This site was rich in Mesozoic mammal remains from the Bathonian Forest Marble Formation.

However, a recent fossil recovered from the Kilmaluag Formation of Skye, Scotland comprised a lower jaw with five molar teeth, four premolars, a canine and one incisor present.

[2] This more complete fossil suggests that the separate species previously named from England were in fact all the same species, P. ooliticus, and only appeared different due to their differing position along the tooth row.