The neck was relatively short but well-muscled as shown by strong epipophyses (processes to which neck muscles attached).
There were about sixteen dorsal vertebrae.
Suchomimus had significantly extended neural spines—blade-shaped upward extensions on the vertebrae—which were elongated at the rear back.
Those of the five sacral vertebrae were the longest.
The elongation of these structures continued until the middle of the tail.
The spines may have held up some kind of low crest or sail of skin that was highest over its hips, lower and extending further to the back than that of Spinosaurus, in which the sail reached its highest peak over the dorsal vertebrae.
This condition was more reduced in Baryonyx.

The furcula was V-shaped and indicates a high and narrow trunk.
The scapula had a rectangular acromion, or attachment site for clavicle (collarbone).
The humerus (upper arm bone) was very strongly built, only equaled in size among non-spinosaurid theropods by that of Megalosaurus and Torvosaurus, with robust upper corners.
The humerus had a boss (bone overgrowth) above the condyle that contacted its hook-shaped radius (forearm bone).
Accordingly, the ulna of the lower arm was well-developed with an enormous olecranon (upper process set-off from the shaft), an exceptional trait shared with Baryonyx.
The heavy arm musculature powered sizable hand claws, that of the first digit (or "thumb") being the largest with a length of 19 centimetres (7.5 inches).
Only the third metacarpal (long bone of the hand) is known; showing a robust morphology (form).
In the pelvis, the ilium (main hip bone) was high.
The pubis (pubic bone) had a front surface that was wider than the side surface, and its forward-facing lower end was flattened and rectangular, with a brief flange along the midline, in contrast to the expanded boot shape it had in other theropods.
The ischium (lower and rearmost hip bone) bore a low obturator flange.
The femur (thighbone) was straight and robust, with a length of 107 cm (42 in) in the holotype.
Its lesser trochanter is markedly plate-like.
In the ankle, the astralagus had an ascending process taller than that of Allosaurus.
The neck was relatively short but well-muscled as shown by strong epipophyses (processes to which neck muscles attached). There were about sixteen dorsal vertebrae. Suchomimus had significantly extended neural spines—blade-shaped upward extensions on the vertebrae—which were elongated at the rear back. Those of the five sacral vertebrae were the longest. The elongation of these structures continued until the middle of the tail. The spines may have held up some kind of low crest or sail of skin that was highest over its hips, lower and extending further to the back than that of Spinosaurus, in which the sail reached its highest peak over the dorsal vertebrae. This condition was more reduced in Baryonyx.
The furcula was V-shaped and indicates a high and narrow trunk. The scapula had a rectangular acromion, or attachment site for clavicle (collarbone). The humerus (upper arm bone) was very strongly built, only equaled in size among non-spinosaurid theropods by that of Megalosaurus and Torvosaurus, with robust upper corners. The humerus had a boss (bone overgrowth) above the condyle that contacted its hook-shaped radius (forearm bone). Accordingly, the ulna of the lower arm was well-developed with an enormous olecranon (upper process set-off from the shaft), an exceptional trait shared with Baryonyx. The heavy arm musculature powered sizable hand claws, that of the first digit (or "thumb") being the largest with a length of 19 centimetres (7.5 inches). Only the third metacarpal (long bone of the hand) is known; showing a robust morphology (form). In the pelvis, the ilium (main hip bone) was high. The pubis (pubic bone) had a front surface that was wider than the side surface, and its forward-facing lower end was flattened and rectangular, with a brief flange along the midline, in contrast to the expanded boot shape it had in other theropods. The ischium (lower and rearmost hip bone) bore a low obturator flange. The femur (thighbone) was straight and robust, with a length of 107 cm (42 in) in the holotype. Its lesser trochanter is markedly plate-like. In the ankle, the astralagus had an ascending process taller than that of Allosaurus.
Suchomimus