Eucamerotus

Eucamerotus (meaning "well-chambered", in reference to the hollows of the vertebrae) is an extinct genus of sauropod dinosaur from the Early Cretaceous (Barremian) Wessex Formation (Wealden) of the Isle of Wight, England. The type specimen, part of a vertebra (one of the bones of the spine), was discovered in the autumn of 1869 by John Hulke. After confirming its point of origin with the Rev. William Fox, Hulke presented his find to the Geological Society of London in 1870. Two years later, he assigned to it the name Eucamerotus, though did not provide a species name. Eucamerotus was subsequently treated as a junior synonym of two existing sauropods, Pelorosaurus and Ornithopsis. In 1995, William T. Blows gave a species name, creating the combination Eucamerotus foxi. While the validity of the genus has continued to be questioned, a 2011 publication found it to be a valid genus of titanosauriform. Comparisons with the fossils of other macronarians suggests it may have reached up to in length.

==History and taxonomy== The holotype of Eucamerotus (NHMUK R.2522), a neural arch, was collected by geologist John Hulke in the autumn of 1869, near Brighstone Bay on the Isle of Wight, in "a large block of stone". He brought it to the attention of the Rev. William Fox, who pinpointed its origin to "a bed which occurs near the top of the high cliff between Brooke and Chilton". The following year, Hulke presented the vertebra to the Geological Society of London, providing a description of it and measurements. Two years later, he assigned a name to the specimen, Eucamerotus, and suggested that the lectotype of Ornithopsis hulkei might be assignable to it. The genus name Eucamerotus derives from the Ancient Greek eu- ("well") and kamerotus ("chambered"). In naming Eucamerotus, Hulke neglected to designate a type species.