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Illustration of the skeletal anatomy of a Plesiosaurus dolichodeirus from Conybeare's 1824 paper that described an almost complete plesiosaur skeleton found by Mary Anning in 1823. Plesiosaurus was a moderately sized plesiosaur that grew to 2.87–3.5 m (9.4–11.5 ft) in length.
The full complement of bones of the tetrapod skull roof, as seen in the temnospondyl Xenotosuchus. The skull roof or the roofing bones of the skull are a set of bones covering the brain, eyes and nostrils in bony fishes and all land-living vertebrates. The bones are derived from dermal bone and are part of the dermatocranium.
In non-human vertebrates, the parietal bones typically form the rear or central part of the skull roof, lying behind the frontal bones. In many non-mammalian tetrapods , they are bordered to the rear by a pair of postparietal bones that may be solely in the roof of the skull, or slope downwards to contribute to the back of the skull, depending ...
The paired parietal is the hindmost bone of the skull roof. A dermal bone, it is located behind the frontals, and roofs the braincase. [25]: 38 [1]: 141 [20] parietal fenestrae The parietal fenestrae are a pair of window-like openings commonly found in the neck frills of ceratopsians.
The pterion is the region where the frontal, parietal, temporal, and sphenoid bones join. [1] It is located on the side of the skull, just behind the temple.It is also considered to be the weakest part of the skull, which makes it clinically significant, as if there is a fracture around the pterion it could be accompanied by an epidural hematoma.
Elasmosaurus was one of few plesiosaurs known from the New World at the time, and the first recognized member of the long-necked family of plesiosaurs, the Elasmosauridae. [ 2 ] In 1869 Cope scientifically described and figured Elasmosaurus , and the preprint version of the manuscript contained a reconstruction of the skeleton which he had ...
Bones of Leptocleidus superstes: Yuzhoupliosaurus chengjiangensis. Bathonian [11] Bathonian [11] Bathonian [11] Brancasaurus brancai. Berriasian [5] Berriasian [5] Berriasian [5] Skeleton of Brancasaurus brancai: Muraenosaurus leedsi. Callovian [5] Callovian [5] Callovian [5] Life restoration of Muraenosaurus leedsi: Cryptoclidus richardsoni ...
1 occipital bone; 2 parietal bones; 1 sphenoid bone; 2 temporal bones; The ossicles (three on each side) are usually not included as bones of the neurocranium. [6] There may variably also be extra sutural bones present. Below the neurocranium is a complex of openings and bones, including the foramen magnum which houses