The vertebral column is almost completely known, and the holotype is one of the few sauropod specimens that include a complete neck.
The neck was composed of 13 cervical vertebrae.
The trunk had 12 dorsal and four sacral vertebrae.
The tail comprised more than 37 caudal vertebrae.
Complex elements, individual vertebrae are composed of a lower part, the centrum, and an upper part, the neural arch.
Important landmarks of the neural arch include the upwards projecting neural spine (spinous process) and the sideward projecting diapophyses, which together give the vertebra a T-shape in front and rear views.
Pairs of articular processes connecting with neighboring vertebrae are protruding from the front (prezygapophyses) and rear (postzygapophyses).

The cervical vertebrae were similar to those of Jobaria and Cetiosaurus.
Their centra were approximately 3.1 times as long as wide; they were therefore moderately elongated compared to sauropods in general, but generally longer than in other basal forms.
The cervical centra had large excavations on their sides that deepened towards the front; such pleurocoels were also developed in Jobaria and Patagosaurus.
Unlike in Jobaria, the pleurocoels were not subdivided by an oblique bony ridge.
A midline keel was present on the underside of the front end of the centrum, which was absent in Cetiosaurus.
The tips of the prezygapophyses had a triangular extension which is also seen in Jobaria, although it is deeper in that genus.
Above the postzygapophyses were comparatively large epipophyses, bony projections for muscle attachment.
The cervical vertebrae were different from those of basal sauropods from South America and India.
The diapophyses (sideward facing processes of the neural arch) were inclined to face slightly downwards and had triangular flanges on their rear margins—features unseen in those southern forms.
Furthermore, the neural spines were rugose (wrinkled) on their rear and front surfaces and close to the base of the neck, broader in side view and less high.
In side view, a U-shaped depression was present between the centrum and the neural arch, which is an autapomorphy (unique feature) of Spinophorosaurus.

The dorsal vertebrae were unusual in having a camellate internal structure (containing multiple small air-filled chambers).
This feature is otherwise known in the much later titanosauriforms as well as in mamenchisaurids, where it evolved independently from the former group.
Although the front dorsal vertebrae showed deep pleurocoels in their centra, these openings became much shallower towards the rear of the trunk.
The rearmost dorsal vertebrae were also proportionally short.
In Amygdalodon and Patagosaurus, in contrast, the rearwards dorsals were more elongated and had pronounced pleurocoels.
The neural canal of the dorsal vertebrae was very narrow but high.
Hyposphene-hypantrum articulations (accessory articular processes) were present in all dorsals, making the spine more rigid.
The neural spines had marked rugosities on their front and back sides, as in other basal sauropods.
The frontmost caudal vertebrae had the same rugosities on the neural spines as seen in the dorsals, a feature otherwise only known in Omeisaurus.
In the hind part of the tail, the neural spines were strongly inclined backwards and extended over the front part of the succeeding vertebra, similar to some East Asian sauropods, Barapasaurus, and Jobaria.

The ribs of the second to fifth dorsal vertebrae were flattened and backwards directed, while those of the sixth to eleventh dorsal were more circular in cross-section and more vertically oriented.
The ribcage can therefore be clearly subdivided into a pectoral and a lumbar section; such a differentiation has only been described in a single other sauropod, the dicraeosaurid Brachytrachelopan.
Furthermore, the ends of the pectoral ribs had attachment sites for the sternal ribs, which connected to the sternum.
In the front part of the tail, the chevrons (paired bones below the vertebral centra) were blade-like, which is the basal condition.
In the rear
The vertebral column is almost completely known, and the holotype is one of the few sauropod specimens that include a complete neck. The neck was composed of 13 cervical vertebrae. The trunk had 12 dorsal and four sacral vertebrae. The tail comprised more than 37 caudal vertebrae. Complex elements, individual vertebrae are composed of a lower part, the centrum, and an upper part, the neural arch. Important landmarks of the neural arch include the upwards projecting neural spine (spinous process) and the sideward projecting diapophyses, which together give the vertebra a T-shape in front and rear views. Pairs of articular processes connecting with neighboring vertebrae are protruding from the front (prezygapophyses) and rear (postzygapophyses).
The cervical vertebrae were similar to those of Jobaria and Cetiosaurus. Their centra were approximately 3.1 times as long as wide; they were therefore moderately elongated compared to sauropods in general, but generally longer than in other basal forms. The cervical centra had large excavations on their sides that deepened towards the front; such pleurocoels were also developed in Jobaria and Patagosaurus. Unlike in Jobaria, the pleurocoels were not subdivided by an oblique bony ridge. A midline keel was present on the underside of the front end of the centrum, which was absent in Cetiosaurus. The tips of the prezygapophyses had a triangular extension which is also seen in Jobaria, although it is deeper in that genus. Above the postzygapophyses were comparatively large epipophyses, bony projections for muscle attachment. The cervical vertebrae were different from those of basal sauropods from South America and India. The diapophyses (sideward facing processes of the neural arch) were inclined to face slightly downwards and had triangular flanges on their rear margins—features unseen in those southern forms. Furthermore, the neural spines were rugose (wrinkled) on their rear and front surfaces and close to the base of the neck, broader in side view and less high. In side view, a U-shaped depression was present between the centrum and the neural arch, which is an autapomorphy (unique feature) of Spinophorosaurus.
The dorsal vertebrae were unusual in having a camellate internal structure (containing multiple small air-filled chambers). This feature is otherwise known in the much later titanosauriforms as well as in mamenchisaurids, where it evolved independently from the former group. Although the front dorsal vertebrae showed deep pleurocoels in their centra, these openings became much shallower towards the rear of the trunk. The rearmost dorsal vertebrae were also proportionally short. In Amygdalodon and Patagosaurus, in contrast, the rearwards dorsals were more elongated and had pronounced pleurocoels. The neural canal of the dorsal vertebrae was very narrow but high. Hyposphene-hypantrum articulations (accessory articular processes) were present in all dorsals, making the spine more rigid. The neural spines had marked rugosities on their front and back sides, as in other basal sauropods. The frontmost caudal vertebrae had the same rugosities on the neural spines as seen in the dorsals, a feature otherwise only known in Omeisaurus. In the hind part of the tail, the neural spines were strongly inclined backwards and extended over the front part of the succeeding vertebra, similar to some East Asian sauropods, Barapasaurus, and Jobaria.
The ribs of the second to fifth dorsal vertebrae were flattened and backwards directed, while those of the sixth to eleventh dorsal were more circular in cross-section and more vertically oriented. The ribcage can therefore be clearly subdivided into a pectoral and a lumbar section; such a differentiation has only been described in a single other sauropod, the dicraeosaurid Brachytrachelopan. Furthermore, the ends of the pectoral ribs had attachment sites for the sternal ribs, which connected to the sternum. In the front part of the tail, the chevrons (paired bones below the vertebral centra) were blade-like, which is the basal condition. In the rear
Spinophorosaurus