Popich and Smith's  method of calculating fontanelle size, as modified by Faix,  was adopted for the study.
According to Tan,'61 wide sutures have been associated with large fontanelle size in the presence of normal head circumference in completely normal healthy neonates.
Anterior fontanelle size in healthy Israeli newborn infants.
Fontanelle size in black and white term newborn infants.
Estimates of genetic variance for anterior fontanelle development in NCPP twin population.
Emended diagnosis: Basal member of Eucryptodira, more than 60 cm in length, possessing well-developed free regions of the dorsal ribs, which correspond to more than three quarters of the width of the last pair of costals, and sharing the following character combination: absence of nuchal notch; presence of a single cervical scute; very wide vertebral scutes; wide fontanelles between the costal and the peripheral plates; robust and high plastral processes; angle formed by the scapular and the acromial processes of the scapula around 110 degrees.
Very wide fontanelles are developed between these plates and the peripheral series.
However, it differs from Thalassemys due to numerous characters, including: the presence of very wide fontanelles between the costal and peripheral plates, with the free region of the dorsal ribs being very wide relative to the width of these plates, especially the last pairs of costals; absence of the carapace cordiform morphology characteristic of Thalassemys; very wide vertebral scutes; different morphology of the preserved suprapygal; much robust and higher plastral buttresses.
Characters such as, among others, its larger size, the absence of lateral plastral fontanelles and the more developed plastral buttresses allows Enaliochelys chelonia to be differentiated from the eurysternids.
The anterior fontanelle has an important relationship to the nasolacrimal apparatus.
Unlike the anterior fontanelle, the posterior fontanelle serves as a relatively safe surgical landmark during a middle meatal antrostomy.
A maxillary sinoscopic view of the medial wall of the left maxillary sinus will show the relationship of the natural ostium and the posterior fontanelle (figure, C).