Outline: a typical sauropod

Ashdown Fm., United KingdomNamed 2007

Xenoposeidon

"strange Poseidon"

Type species Xenoposeidon proneneukos

Lived
139 to 133 million years ago, Early Cretaceous
Diet
Herbivore
Group
Sauropods, Rebbachisauridae
Found in
United Kingdom
Named by
Taylor and Naish 2007

Where its fossils were found

The evidence

Today

1 find

135 million years ago

Map: C. R. Scotese, PALEOMAP

Field notes

About Xenoposeidon

What it was like

Xenoposeidon was a sauropod known from a single back bone. That bone is so unusual in shape that it clearly came from a new kind of sauropod. It was probably a rebbachisaurid, the family of Rebbachisaurus.

Its world

It lived in the Early Cretaceous, in what is now England. It comes from the Ashdown Formation, where early relatives of Iguanodon and the armored Hylaeosaurus also lived.

How it was found

Taylor and Naish named Xenoposeidon in 2007. The type species is Xenoposeidon proneneukos. The bone had sat in a museum collection for over a century before it was studied.

Lived alongside

Found in the same rock formations

Close relatives

Other members of Rebbachisauridae

Sources: WikidataNamed in: M. P. Taylor and D. Naish. 2007. An unusual new neosauropod dinosaur from the Lower Cretaceous Hastings Beds Group of East Sussex, England. Palaeontology 50(6):1547-1564