Genus: Omosaurus non OWEN, 1875 non LEIDY, 1856

Species: phillipsii SEELEY, 1893 (nomen dubium)
Etymology: In honor of John Phillips.
= Dacentrurus phillipsii (SEELEY, 1869) HENNING, 1915 (nomen dubium)

Holotype: YM 498

Locality: East of Carlisle's estate, Slingsby, North Yorkshire County, England, Southern United Kingdom.

Horizon: Malton Oolite Member, Coralline Oolite Formation.

Biostratigraphy: Cardioceras densiplicatum zone (old Cardioceras vertebrale subzone, Perisphnictes plicatilis zone).

Age: Basal Middle Oxfordian Stage, Middle Malm Epoch, Middle Late Jurassic.

Material: Juvenile left femur in three pieces.