The Westbury Formation is a geological formation in England, one of the Penarth Group. It dates back to the Rhaetian. The formation is named after the village of Westbury-on-Severn in Gloucestershire. The remains of a giant shastasaurid and dinosaurs are known from the formation.

Vertebrate fauna

Vertebrates reported from the Westbury Formation
GenusSpeciesLocationStratigraphic positionMaterialNotesImages
AvalonianusA. sanfordiWedmore Hill"Several now lost teeth."
CamelotiaC. borealisWestbury-on-Severn"Vertebrae, pubis, ischium, femur, tibia, phalanges, adult."Camelotia
IchthyotitanI. severnensisBlue Anchor and LilstockTwo partial surangularsPossibly one of the largest marine reptiles
PicrodonP. herveyiWedmore Hill"Tooth."
ShastasauridaeIndeterminateAust"Three partial specimens."
PachystropheusSeveral partial postcranial skeletonsA small thalattosaurian marine reptile, youngest known thalattosaur
LissodusL. minimusA hybodont shark
SaurichthysA pike or gar-like predatory fish
SargodonA dapediiform fish
GyrolepisA ray-finned fish
BirgeriaA large predatory fish
CeratodusA lungfish

See also