Species: mantelli OWEN, 1853
Etymology:

Holotype:

Locality: Tilgate Forest, West Sussex County, England, Southern United Kingdom.

Horizon: Wadhurst Clay, Lower Wealden Formation.

Biostratigraphy:

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

Material: Right hyosternal.
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Species: dixoni OWEN, 1853
Etymology:

Holotype:

Locality: Tilgate Forest, West Sussex County, England, Southern United Kingdom.

Horizon: Wadhurst Clay, Lower Wealden Formation.

Biostratigraphy:

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

Material: Left hyosternal bone.