The skeleton was small, about 20.3 cm (8.0 inches) in length, not including the tail. The tail is incomplete, but including its estimated length, the total length of the skeleton would have been closer to 40.0 cm (15.7 inches).
Coeruleodraco had a generalized, lizard-like body type. This is similar to some early choristoderes (like
Cteniogenys,
Philydrosaurus, and
Monjurosuchus), but contrasts with other choristodere body types including long-necked forms such as
Hyphalosaurus, and
gharial-like forms such as
Champsosaurus and other
neochoristoderes. of
C. jurassicus compared to a human hand The skull had a short, pointed snout with about 38 teeth on each side (a low number by choristodere standards). It also had two nares (nostril holes). While paired nares are standard in most reptile groups, almost all other choristoderes (except
Lazarussuchus) typically have one single hole in the skull for the nostrils, making
Coeruleodraco's retention of paired nares a
plesiomorphic ("primitive") feature relative to most other choristoderes. In common with other choristoderes,
Coeruleodraco has elongated
prefrontal bones which meet each other at the top of the snout, separating a pair of small, triangular
nasal bones in the process. The nasals are so reduced in size (especially compared to
Philydrosaurus) that they are completely surrounded by the prefrontals and
premaxillary bones, and fail to contact the toothed
maxillary bones. The
postorbital and
postfrontal bones (which lie behind the eye) are separate from each other; in many other choristoderes these bones fuse into a single postorbitofrontal bone. The rear of the skull is not particularly unusual, with each side of the skull having two holes known as temporal fenestrae (as with other
diapsids). The upper temporal fenestra is not elongated (unlike neochoristoderes), but the lower temporal fenestra is low and long. The rear edge of each upper temporal fenestra was formed by the
squamosal bone, which was ornamented with small spines. The postcranial skeleton was very similar to that of
Philydrosaurus. The neck was short, and its vertebrae had low, swollen neural arches (upper portions). There were six or seven vertebrae in the neck, 16 in the torso, three in the hip, and more than 24 in the tail, which is incomplete. Vertebrae were longer than high, and the neural arches were completely fused to the centra (lower, spool-shaped portions), in contrast to the condition in neochoristoderes. Vertebrae at the base of the tail were fused to fan-shaped ribs which projected straight out. Further down the tail, these ribs became shorter and rectangular. The humerus was robust, with a roughly-textured knob above the large
entepicondyle. The plate-like
ischium bone (which formed the rear lower part of the hip) had a distinct triangular prong along its rear edge. ==Classification==