In addition to the aforementioned forward projections, the trapezoidal coracoid of Mauriciosaurus differs from those of Dolichorhynchops and Trinacromerum in that it lacks perforations along its midline and at its back margin.
While this may possibly be influenced by the specimen's young age, it is unusual that they are entirely absent at this stage of development.
Additionally, unlike Eopolycotylus, the surface of the coracoid in Mauriciosaurus is largely smooth and devoid of pits (foramina).
The front and back of the scapula are convex while the other edges are concave; the dorsal scapular process projects upwards from the outer edge.
At the front of the scapula is a small ridge that probably would have supported an extension made of cartilage.
Within the pelvis, the pubis is the largest bone, being a third larger than the ischium and six times larger than the ilium, which is not curved unlike Eopolycotylus.
The rounded shape of the pubis can be attributed to the specimen's immaturity.

One of the traits that allies Mauriciosaurus with other polycotyline polycotylids is its slightly S-shaped humerus, which is approximately 1.6 times as long as it is wide.
Like other polycotylids, the humerus is also shorter than the femur, but has a wider bottom end.
The humerus does not have a bulge situated behind the humeral head, in contrast to Eopolycotylus.
Neither the humerus or the femur bears an articular facet for the lower limb, unlike Trinacromerum.
The primary epipodials - the radius and ulna on the front flipper, and the tibia and fibula on the hind flipper - meet along their entire lengths with no openings, and they are wider than they are long - all traits shared with other polycotylines.
In Trinacromerum, however, these bones are less wide such that they appear to be roughly equal-sided.

Each flipper bore five digits; the second and fourth are the longest in the front flippers, and the fourth is the longest in the hind flippers.
Across all of the flippers, the phalanges on the third digit have a length/width ratio of 1.77 - similar to Trinacromerum, longer than the 1.45 of Dolichorhynchops, and shorter than the 1.9 of Palmulasaurus.
This may be indicative of Mauriciosaurus having retained the more primitive pattern of long phalanges.
All of the phalanges in the digits interlock, like other polycotylids.
Another trait Mauriciosaurus shares with other polcotylines is that it bears only three distal tarsals as opposed to four, with the second and third having fused into a single structure.
In addition to the aforementioned forward projections, the trapezoidal coracoid of Mauriciosaurus differs from those of Dolichorhynchops and Trinacromerum in that it lacks perforations along its midline and at its back margin. While this may possibly be influenced by the specimen's young age, it is unusual that they are entirely absent at this stage of development. Additionally, unlike Eopolycotylus, the surface of the coracoid in Mauriciosaurus is largely smooth and devoid of pits (foramina). The front and back of the scapula are convex while the other edges are concave; the dorsal scapular process projects upwards from the outer edge. At the front of the scapula is a small ridge that probably would have supported an extension made of cartilage. Within the pelvis, the pubis is the largest bone, being a third larger than the ischium and six times larger than the ilium, which is not curved unlike Eopolycotylus. The rounded shape of the pubis can be attributed to the specimen's immaturity.
One of the traits that allies Mauriciosaurus with other polycotyline polycotylids is its slightly S-shaped humerus, which is approximately 1.6 times as long as it is wide. Like other polycotylids, the humerus is also shorter than the femur, but has a wider bottom end. The humerus does not have a bulge situated behind the humeral head, in contrast to Eopolycotylus. Neither the humerus or the femur bears an articular facet for the lower limb, unlike Trinacromerum. The primary epipodials - the radius and ulna on the front flipper, and the tibia and fibula on the hind flipper - meet along their entire lengths with no openings, and they are wider than they are long - all traits shared with other polycotylines. In Trinacromerum, however, these bones are less wide such that they appear to be roughly equal-sided.
Each flipper bore five digits; the second and fourth are the longest in the front flippers, and the fourth is the longest in the hind flippers. Across all of the flippers, the phalanges on the third digit have a length/width ratio of 1.77 - similar to Trinacromerum, longer than the 1.45 of Dolichorhynchops, and shorter than the 1.9 of Palmulasaurus. This may be indicative of Mauriciosaurus having retained the more primitive pattern of long phalanges. All of the phalanges in the digits interlock, like other polycotylids. Another trait Mauriciosaurus shares with other polcotylines is that it bears only three distal tarsals as opposed to four, with the second and third having fused into a single structure.
Mauriciosaurus