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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 fact that the osteology of the plesiosaur's neck makes it absolutely safe to say that the plesiosaur could not lift its head like a swan out of water as the Loch Ness monster does, the assumption that air-breathing animals would be easy to see whenever they appear at the surface to breathe, [146] the fact that the loch is too small and ...
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 ischia (a pair of bones that formed part of the pelvis) were joined at the middle, so that a medial bar was present along the length of the pelvis, a feature usually not found in plesiosaurs. [2] Like other elasmosaurids (and plesiosaurs in general), Elasmosaurus would have had large, paddle-like limbs with very long digits .
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 ...
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.
The parietal bone is usually present in the posterior end of the skull and is near the midline. This bone is part of the skull roof, which is a set of bones that cover the brain, eyes and nostrils. The parietal bones make contact with several other bones in the skull.
These extended margins of thinned bone are called supratemporal fossae. Synapsids, including mammals, have one temporal fenestra, which is ventrally bordered by a zygomatic arch composed of the jugal and squamosal bones. This single temporal fenestra is homologous to the infratemporal fenestra, as displayed most clearly by early synapsids. [2]
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