"Venenosaurus" had unusual lateral fossae, which looked like deep depressions in the outside walls of the vertebral centra. Some fossae are divided into two chambers by a ridge inside the depression. In most sauropods the fossae would form pneumatic openings leading to the interior of the centrum, rather than just being a depression. Less well-developed, but similar fossae are known from "Cedarosaurus". Fossae that similarly resemble shallow depressions are known from "Saltasaurus", "Alamosaurus", "Aeolosaurus", "Gondwanatitan", and "Malawisaurus". These taxa differ, however, in that their fossae are even shallower, lack the division into chambers, and do not extend as far into the vertebral columns as those of "Venenosaurus".