Marmarospondylus

Marmarospondylus ("marble [reference to the Forest Marble Formation] vertebra") is a dubious genus of sauropod dinosaur from Middle Jurassic deposits in the English Midlands.
The type species, "Marmarospondylus robustus", was described by Richard Owen as a species of the Late Jurassic genus "Bothriospondylus" in 1875. The holotype, NHMUK R.22428, a dorsal, was found in the Bathonian-age Forest Marble Formation at Bradford-on-Avon, Wiltshire. Owen himself in an addendum to the same publication coined "Marmarospondylus" for "B. robustus", presumably due to its being older than "B. suffossus". Recent publications have treated "Marmarospondylus" as a dubious member of Macronaria.