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An antorbital fenestra (plural: fenestrae) is an opening in the skull that is in front of the eye sockets. This skull character is largely associated with archosauriforms, first appearing during the Triassic Period. Among extant archosaurs, birds still possess antorbital fenestrae, whereas crocodylians have lost them. The loss in crocodylians ...
In zoology, the trilobite Fenestraspis possessed extensive fenestrae in the posterior part of the body. [8] In the Paleognathae, there is an ilio–ischiatic fenestra. Fenestrae are also used to distinguish the three types of amniote: The ancestor of the amniotes is a primitive lizard, Hylonomus. From this reptile, three groups of amniotes ...
Temporal fenestrae are commonly (although not universally) seen in the fossilized skulls of dinosaurs and other sauropsids (the total group of reptiles, including birds). [1] The major reptile group Diapsida , for example, is defined by the presence of two temporal fenestrae on each side of the skull.
A leaf blower, commonly known as a blower, is a device that propels air out of a nozzle to move debris such as leaves and grass cuttings. Leaf blowers are powered by electric or gasoline motors . Gasoline models have traditionally been two-stroke engines , but four-stroke engines were recently introduced to partially address air pollution concerns.
Fenestranes, from left to right: generic fenestrane, [4.4.4.4]fenestrane with carbon atoms shown and [5.5.5.5]fenestrane. A fenestrane in organic chemistry is a type of chemical compound with a central quaternary carbon atom which serves as a common vertex for four fused carbocycles. [1]
The supratemporal fenestrae are rounded, giving the parietal an hourglass shape. The axial and epaxial skeleton are largely similar to other species of alligators, however Alligator hailensis stands out as being known from much more material than other extinct members of the genus across various age groups.