Species: becklesii FALCONER, 1857
Etymology:

Holotype: BMNH 47731

Locality: Durdlestone Bay, Swanage, Dorset County, England, Southern United Kingdom.

Horizon: Purbeckian.

Biostratigraphy:

Age: Tithonian Stage, Upper Malm Epoch, Late Jurassic.

Material: Right mandibular ramus, the anterior portion with the incisor and 3 premolars seen in outer aspect on one slab, the posterior portion with the molar alveoli and coronoid and condylar processes seen in internal aspect on the counterpart.

Referred material:

BMNH 47732: Part of right ramus, free of matrix, with base of incisor the first 2 premolars, and the anterior half of the third.

BMNH 47733: Fragment of right ramus with 2 molars.

BMNH 47734: The left incisor and premolars in the outer aspect, the mandible being absent.

 

= Plagiaulax medius OWEN, 1871
Etymology:

Holotype: BMNH 47728

Locality: Durdlestone Bay, Swanage, Dorset County, England, Southern United Kingdom.

Horizon: Purbeckian.

Biostratigraphy:

Age: Tithonian Stage, Upper Malm Epoch, Late Jurassic.

Material: Left mandibular ramus, outer aspect, with the incisor and ll the premolars preserved.

_____________________________________________________________________________________

Species:? dawsoni WOODWARD, 1891
Etymology:
= Plioprion? dawsoni WOODWARD, 1891
= Loxaulax dawsoni (WOODWARD, 1891) SLOAN, 1979

Holotype: BMNH M13134

Locality: Wadhurst Clay, Hastings, East Sussex County, England, Southern United Kingdom.

Horizon: Wealden Formation.

Biostratigraphy:

Age: Lower Valanginian Stage, Middle Neocomian Subepoch, Lower Early Cretaceous Epoch, Early Cretaceous.

Material: A badly worn and broken molar tooth.