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The infratemporal fenestra, also called the lateral temporal fenestra or lower temporal fenestra, is the lower of the two and is exposed primarily in lateral (side) view. Temporal fenestrae in relation to the other skull openings in the dinosaur Massospondylus , a type of diapsid .
The skull, or cranium, ... Temporal fenestra; Bones. The jugal is a skull bone that found in most of the reptiles, amphibians and birds. In mammals, the jugal is ...
This schematic shows the skull viewed from the left side. The middle opening is the orbit of the eye; the opening to the right of it is the temporal fenestra. Synapsids evolved a temporal fenestra behind each eye orbit on the lateral surface of the skull. It may have provided new attachment sites for jaw muscles.
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. [1] The postcranial skeleton was very similar to that of Philydrosaurus. The neck was short, and its ...
The name Diapsida means "two arches", and diapsids are traditionally classified based on their two ancestral skull openings (temporal fenestrae) posteriorly above and below the eye. This arrangement allows for the attachment of larger, stronger jaw muscles , and enables the jaw to open more widely.
A long low skull and dentition extended far back to lie below the temporal fenestra. Aerosaurus had other general features found in ‘pelycosaurs’, like a slanted occiput, a lateral temporal fenestra, a septomaxilla bone that contacting the nasal and a maxilla bone contacting the quadrojugal. [2]
Below the orbit and framed by the squamosal, postorbital, quadratojugal, and jugal was the lateral temporal fenestra, another major skull opening. In Bajadasaurus, this opening was narrow and obliquely oriented. The quadratojugal formed an obtuse angle that framed the lower rear part of the lateral temporal fenestra, different from the feature ...
An anapsid is an amniote whose skull lacks one or more skull openings (fenestra, or fossae) near the temples. [1] Traditionally, the Anapsida are considered the most primitive subclass of amniotes, the ancestral stock from which Synapsida and Diapsida evolved, making anapsids paraphyletic. It is, however, doubtful that all anapsids lack ...