The cranial roof is the narrowest just posterior to the parietal foramen, which is very nearly circular in shaped.
2.
There is a complete loss of the parietal foramen . " Megagomphodon oligodens " may have been derived from this species.
3.
A hole on the top of the skull behind the eyes called the parietal foramen is relatively large in " Whatcheeria ".
4.
The parietal foramen, a small hole at the top of the skull behind the eyes, is oval-shaped rather than circular as in most other temnospondyls.
5.
One of the fossil samples, " Xujiayao 11 ", had an enlarged parietal foramen ( a hole in the skull ), an extremely rare abnormality that is found in less than 1 out of 25, 000 cases in modern humans.
6.
At the back part and close to the upper or sagittal border is the parietal foramen, which transmits a vein to the superior sagittal sinus, and sometimes a small branch of the occipital artery; it is not constantly present, and its size varies considerably.
7.
However, " Myrmecodaptria " has many features that are not found in gekkotans, such as the presence of a small hole at the top of the skull called the parietal foramen, a thick jugal bone forming a complete postorbital bar behind the eye socket, and a complete upper temporal arch closing off a pair of holes at the top of the skull called the supratemporal fenestrae . " Myrmecodaptria " was again included in a phylogenetic analysis authored by Jack Conrad in 2008, which placed it in an extinct group called Bainguidae.
8.
Bardet et al . ( 2005, p . 465 ) diagnose " Eonatator sternbergii " as follows : " Ambiguous characters : premaxilla-maxilla lateral suture ending posterior to 9th maxillary teeth; tail about 40 % of the head and trunk length ( convergent in mosasaurines ); parietal with smooth triangular table extending very far posteriorly, bearing medium-sized circular foramen, located at distance twice its diameter from the frontal-parietal suture, and surrounded anteriorly and posteriorly by two parallel ridges; rounded quadrate with regularly convex tympanic " ala " ( wing ); vertebral formula : seven cervicals, 24 dorsals, four pygals, 28 median caudals and at least 41 terminal caudals; humerus length approximately 2.5x distal width . " " E . coellensis " is diagnosed by more retracted nostrils, between the 7 and the 17 maxillary teeth, premaxilla and maxilla with a short rostrum anterior to the first teeth; presence of a septomaxilla, a large prefrontal that makes most of the margin of the outer nostril, a short and wide frontal, a parietal foramen located near of the fronto-parietal suture, a triangular surface of the parietal with two medial depressions and 22 caudal vertebrae.
मोबाइल