The scapula was unique amongst sauropods, being strongly curved with an expanded, fan-shaped lower end.
It was D-shaped in cross-section, a feature characteristic for eusauropods.
Its upper end was broadened and featured a bony flange on the lower margin.
In these respects it was similar to mamenchisaurids from Asia but different from the Gondwanan forms Vulcanodon, Barapasaurus, and Patagosaurus, in which the upper end was only weakly broadened, and the rear flange lacking.
The coracoid, which articulated to the lower end of the scapula, showed a distinct kidney-shape, considered an autapomorphy.
It had a large biceps tubercle to which the biceps brachii muscle attached.
The clavicle was robust, although more slender than in Jobaria.
Of the forelimb only the humerus is preserved.
Its lower end was asymmetrical and had enlarged accessory condyles (forward directed projections on the lower front margin of the bone)—features otherwise only seen in mamenchisaurids.
The pubis and ischium of the pelvis were robust, the latter being broadened at its end.
The upper femur (thigh bone) was characterised by the presence of a lesser trochanter on its upper end—a bony projection serving as attachment site for muscles that drew the hind leg forwards and inwards.
The fourth trochanter, which projected from the back surface and anchored muscles that drew the hind leg backwards, was especially large in Spinophorosaurus.
Close to the fourth trochanter was a large opening that is absent in other sauropods, and thus an autapomorphy.
The tibia (shinbone) was similar to that of other basal sauropods, and the fibula (calf bone) was robust.
Of the ankle, the upper side of the astragalus had facets for articulation with the tibia and fibula that were not separated by a bony wall, and as many as eight nutrient foramina (openings that allow blood vessels to enter the bone).

Elements originally interpreted as a left and right osteoderm (bone formed in the skin) were found with the holotype skeleton.
These bones had a roundish base from which a spike-like projection protruded; the inner surfaces were rugose and concave.
Although found within the pelvic region, Remes and colleagues thought they were situated on the tip of the tail in the living animal, which they considered a distinguishing feature of the genus.
This position was based on the fact that the left and right elements were found closely together, suggesting they came from near the midline of the body.
Furthermore, the stiffening of the hind part of the tail by elongated chevrons is also observed in other dinosaurs showing tail clubs or spikes.
Similar spines were part of a tail club in the related sauropod Shunosaurus; such a tail club was likely not present in Spinophorosaurus, as the hindmost caudal vertebrae became too small.
The right supposed osteoderm was somewhat larger than the left and slightly different in shape.
This indicates they did not form a pair; in which case they would probably be simply the mirror-inverted counterpart of one another.
Rather, these differences indicated two pairs of spines were present originally.

In 2013, palaeontologists Emanuel Tschopp and Octávio Mateus reexamined the supposed tail spikes and found they did not have the typical rugose surface of osteoderms seen in other armoured dinosurs, or the club-like expansion seen in Shunosauru.
Due to their broken edges, They also doubted whether these elements were of different sizes as originally proposed.
As these elements were found under the scapula, they instead proposed they represented clavicles, and that the fossils should be reassessed in this regard.
Vidal and colleagues concurred with this suggestion in 2015 and 2018.
The scapula was unique amongst sauropods, being strongly curved with an expanded, fan-shaped lower end. It was D-shaped in cross-section, a feature characteristic for eusauropods. Its upper end was broadened and featured a bony flange on the lower margin. In these respects it was similar to mamenchisaurids from Asia but different from the Gondwanan forms Vulcanodon, Barapasaurus, and Patagosaurus, in which the upper end was only weakly broadened, and the rear flange lacking. The coracoid, which articulated to the lower end of the scapula, showed a distinct kidney-shape, considered an autapomorphy. It had a large biceps tubercle to which the biceps brachii muscle attached. The clavicle was robust, although more slender than in Jobaria. Of the forelimb only the humerus is preserved. Its lower end was asymmetrical and had enlarged accessory condyles (forward directed projections on the lower front margin of the bone)—features otherwise only seen in mamenchisaurids. The pubis and ischium of the pelvis were robust, the latter being broadened at its end. The upper femur (thigh bone) was characterised by the presence of a lesser trochanter on its upper end—a bony projection serving as attachment site for muscles that drew the hind leg forwards and inwards. The fourth trochanter, which projected from the back surface and anchored muscles that drew the hind leg backwards, was especially large in Spinophorosaurus. Close to the fourth trochanter was a large opening that is absent in other sauropods, and thus an autapomorphy. The tibia (shinbone) was similar to that of other basal sauropods, and the fibula (calf bone) was robust. Of the ankle, the upper side of the astragalus had facets for articulation with the tibia and fibula that were not separated by a bony wall, and as many as eight nutrient foramina (openings that allow blood vessels to enter the bone).
Elements originally interpreted as a left and right osteoderm (bone formed in the skin) were found with the holotype skeleton. These bones had a roundish base from which a spike-like projection protruded; the inner surfaces were rugose and concave. Although found within the pelvic region, Remes and colleagues thought they were situated on the tip of the tail in the living animal, which they considered a distinguishing feature of the genus. This position was based on the fact that the left and right elements were found closely together, suggesting they came from near the midline of the body. Furthermore, the stiffening of the hind part of the tail by elongated chevrons is also observed in other dinosaurs showing tail clubs or spikes. Similar spines were part of a tail club in the related sauropod Shunosaurus; such a tail club was likely not present in Spinophorosaurus, as the hindmost caudal vertebrae became too small. The right supposed osteoderm was somewhat larger than the left and slightly different in shape. This indicates they did not form a pair; in which case they would probably be simply the mirror-inverted counterpart of one another. Rather, these differences indicated two pairs of spines were present originally.
In 2013, palaeontologists Emanuel Tschopp and Octávio Mateus reexamined the supposed tail spikes and found they did not have the typical rugose surface of osteoderms seen in other armoured dinosurs, or the club-like expansion seen in Shunosauru. Due to their broken edges, They also doubted whether these elements were of different sizes as originally proposed. As these elements were found under the scapula, they instead proposed they represented clavicles, and that the fossils should be reassessed in this regard. Vidal and colleagues concurred with this suggestion in 2015 and 2018.
Spinophorosaurus