antorbital fenestra

It is positioned where the antorbital fenestra would normally be.

The skull preserves an antorbital fenestra, or opening in front of the eyes.

An opening in front of the eye sockets, conversely, is called an antorbital fenestra.

In fact, the namer of Teraterpeton first considered the hole to be an antorbital fenestra.

In Deinonychus, the antorbital fenestra, a skull opening between the eye and nostril, was particularly large.

It is considered highly unlikely that the fifth digit or antorbital fenestra would evolve a second time.

Its snout was elongated with large nares and lacking an antorbital fenestra.

Accordingly, the semi-circular antorbital fenestra, the normally largest skull opening, is short too and smaller than the eye-socket.

For one, Scaphognathus had a proportionately shorter skull (4.5 in) with a blunter tip and a larger antorbital fenestra.

It had a small antorbital fenestra, the hole between the nose and eye common to most archosaurs, including modern birds, though lost in extant crocodylians.

Gasparinisuchus differs from other peirosaurids in having a broad snout and in lacking an antorbital fenestra.

However, the maxilla of Teraterpeton has moved closer to the eye socket, touching the lacrimal and closing off the antorbital fenestra.

Another difference between Youngosuchus and erythrosuchids can be seen in the antorbital fenestra, a hole in the skull in front of the eyes.

Historically, many archosauriforms were described as archosaurs, including proterosuchids and erythrosuchids, based on the presence of an antorbital fenestra.

The large, round orbit (eye socket), the sub-triangular antorbital fenestra and the oval naris (nostril) are of almost equal size.

The snout of Archaeornithoides features a long antorbital fenestra, stretching over three quarters of the length of the maxilla.

Low, laterally raised bony ridges were present on the dorsolateral margin of the nasal and lacrimal bones in the skull, directly above the antorbital fenestra.

Caipirasuchus also has large pterygoid and ectopterygoid bones and a well-developed hole in front of the eye sockets called the antorbital fenestra.

Similarities with rauisuchians include a triangular antorbital fenestra and a connection between the ectopterygoid and jugal bones of the skull that is split into two projections.

The anterior margin of the antorbital fenestra is usually bound by the maxilla near the end of the snout and the lacrimal near the eye socket.

In adult Pterodactylus, this crest extended between the back edge of the antorbital fenestra (the largest opening in the skull) and the back of the skull.

Most skull elements are completely fused and two skull openings normally present with dinosaurs, the antorbital fenestra and the upper temporal fenestra, have closed.

The skull is toothless and relatively long, with a straight and very pointed beak, and a large hole where the antorbital fenestra is joined with the nostrils.

The weight-reducing opening in front of the eye socket (antorbital fenestra) was quite large, more than a quarter of the length of the skull and two-thirds of its height.

Eosuchia was initially defined to include all "thecodontian" reptiles which did not have an antorbital fenestra but did retain tabulars, postparietals and a large pineal foramen (Broom, 1914).