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Re: Sauropod caudal vertebra from Middle Jurassic of UK

A news release:



On Mon, Jun 1, 2015 at 11:11 AM, Ben Creisler <bcreisler@gmail.com> wrote:
> Ben Creisler
> bcreisler@gmail.com
> New in PLoS ONE:
> Phillip L. Manning , Victoria M. Egerton & Mike Romano (2015)
> A New Sauropod Dinosaur from the Middle Jurassic of the United Kingdom.
> PLoS ONE 10(6): e0128107
> doi:10.1371/journal.pone.0128107
> http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0128107
> A new record of a sauropodomorph dinosaur is here described from the
> Middle Jurassic (Aalenian) Saltwick Formation of Whitby (Yorkshire),
> UK. A single caudal vertebra represents an early sauropodomorph and
> signifies the earliest recognised eusauropod dinosaur from the United
> Kingdom. The absence of pleurocoels and a narrow, dorsoventrally deep,
> but craniocaudally short centrum, suggests a primitive sauropodomorph.
> Distinct spinopostzygopophyseal laminae rise from the lateral margins
> of the postzygapophyses and pass caudally along what remains of the
> neural spine, a character unique to a subgroup of sauropods that
> includes Barapasaurus, Omeisaurus and other neosauropods and
> eusauropods. The lack of phylogenetically robust characters in
> sauropod caudal vertebrae usually makes it difficult to establish
> affinities, but the absence of mild procoely excludes this specimen
> from both Diplodocoidea and Lithostrotia. The vertebra cannot be
> further distinguished from those of a wide range of basal sauropods,
> cetiosaurids and basal macronarians. However, this plesiomorphic
> vertebra still signifies the earliest stratigraphic occurrence for a
> British sauropod dinosaur.