Genus: Dorsetodon ENSOM & SIGOGNEAU-RUSSELL, 1998
Etymology: Allusion to the geographical origin of the genus, Dorset, England, and Greek, odon, "tooth."

Species: haysomi ENSOM & SIGOGNEAU-RUSSELL, 1998
Etymology: In hour of W. T. Hayson, a quarry owner of the Isle of Purbeck, who drew the attention of the senior author to the Sunnydown site.

Holotye: DORCM GS 433

Locality: Sunnydown Farm Quarry, Langton Matravers, Dorset County, England, Southern United Kingdom.

Horizon: Cherry Freshwater Member, Lulworth Formation, Purbeck Limestone Group.


Age: ?Berriasian Stage, Lower Neocomian Subepoch, Lower Early Cretaceous Epoch, Early Cretaceous.

Material: Right lower molar.

Referred material:

DORCM GS 376: Right lower molar.

DORCM GS 502: Right lower molar.

DORCM GS 438: Left lower molar.

DORCM GS 501: left lower molar.

DORCM GS 625: Left lower molar.

DORCM GS 747: Right lower molar.