This created a problem, because the vertebrae selected by Lydekker came from unknown sediments and were not definitely associated with the original specimens named and described by Owen. Matters were complicated when the original holotype used by Owen was re-discovered, making the designation of a neotype unnecessary.
The selection of vertebrae by Lydekker created an obstacle because they originated from unverified deposits and were not definitely connected to the original specimens named by Owen. The subsequent rediscovery of the original holotype used by Owen increased the complexity of the situation, making it redundant to establish a neotype.