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.

Marmarospondylus Temporal range: Bathonian ~168–166 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Hypothetical life restoration
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Clade:	Archosauromorpha
Clade:	Archosauriformes
Clade:	Dinosauria
Clade:	Saurischia
Clade:	†Sauropodomorpha
Clade:	†Sauropoda
Clade:	†Neosauropoda
Clade:	†Macronaria (?)
Genus:	†Marmarospondylus Owen, 1875
Species:	†M. robustus
Binomial name
†Marmarospondylus robustus Owen, 1875

The type species, Marmarospondylus robustus, was described by Richard Owen as a species of the Late Jurassic genus Bothriospondylus in 1875.^[1] The holotype, NHMUK R.22428, a dorsal vertebra, 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.^[2][3][4]