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Sagittal crest information


Paranthropus aethiopicus' sagittal crest on top of the head

A sagittal crest is a ridge of bone running lengthwise along the midline of the top of the skull (at the sagittal suture) of many mammalian and reptilian skulls, among others. The presence of this ridge of bone indicates that there are exceptionally strong jaw muscles. The sagittal crest serves primarily for attachment of the temporalis muscle, which is one of the main chewing muscles. Development of the sagittal crest is thought to be connected to the development of this muscle. A sagittal crest usually develops during the juvenile stage of an animal in conjunction with the growth of the temporalis muscle, as a result of convergence and gradual heightening of the temporal lines.[citation needed]

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Sagittal crest

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A sagittal crest is a ridge of bone running lengthwise along the midline of the top of the skull (at the sagittal suture) of many mammalian and reptilian...

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Sagittal keel

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parietal bones where they meet along the sagittal suture, or on both bones. Sagittal keels differ from sagittal crests, which are found in some earlier hominins...

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Bili ape

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that had dimensions like that of a chimpanzee, but with a prominent sagittal crest like that of a gorilla. Ammann purchased a photograph from hunters of...

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Irritator

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straight and unserrated conical teeth. Lengthwise atop the head ran a thin sagittal crest, to which powerful neck muscles were likely anchored. The nostrils were...

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Archosauromorpha

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tanystropheids, Trilophosaurus, and derived rhynchosaurs, have a blade-like sagittal crest on the parietal bones at the rear part of the skull roof, between a...

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Paranthropus robustus

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non-human great apes have a larger sagittal crest than females (particularly gorillas and orangutans), the crest may be influenced by sexual selection...

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KNM WT 17000

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The fossil's characteristics include a robust build with a prominent sagittal crest. Its distinct coloration is due to the high manganese content of the...

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Olduvai Gorge

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boisei (renamed and still debated as Paranthropus boisei), featured a sagittal crest and large molars. These attributes suggested the species engaged in...

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Paranthropus

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Paranthropus is characterised by robust skulls, with a prominent gorilla-like sagittal crest along the midline—which suggest strong chewing muscles—and broad, herbivorous...

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California sea lion

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are larger than females, and have a thicker neck, and a protruding sagittal crest. They mainly haul-out on sandy or rocky beaches, but they also frequent...

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Siberian tiger

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the region of the canines. The skull prominences, especially in the sagittal crest and crista occipitalis, are very high and strong in old males, and often...

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Dingo

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canine teeth, larger auditory bullae, a flatter cranium with a larger sagittal crest, and larger nuchal lines. In 2014, a study was conducted on pre-20th...

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Paranthropus boisei

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non-human great apes have a larger sagittal crest than females (particularly gorillas and orangutans), the crest may be influenced by sexual selection...

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Opossum

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of this order have long snouts, a narrow braincase, and a prominent sagittal crest. The dental formula is: 5.1.3.44.1.3.4 × 2 = 50 teeth. By mammalian...

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Rajasaurus

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fossae, depressions on either side of the top of the skull, form a low sagittal crest along the middle of the top of the skull. The front rims of the fossae...

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Caracal

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featuring large auditory bullae, a well-developed supraoccipital crest normal to the sagittal crest, and a strong lower jaw. The caracal has a total of 30 teeth;...

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Meganthropus

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erectus. The specimen was unusual for having a double temporal ridge (sagittal crest), which almost meets at the top of the cranium, and a heavily thickened...

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Tyrannosauridae

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including fused parietal bones with a prominent sagittal crest, which ran longitudinally along the sagittal suture and separated the two supratemporal fenestrae...

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Vulpes

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hind legs have only four. The skull is light and slender, elongated. Sagittal crest not developed at all or weakly defined. Vulpes species have vertically...

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Thrinaxodon

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sagittal crest. The cranial roof is the narrowest just posterior to the parietal foramen, which is very nearly circular in shape. The temporal crests...

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Asian black bear

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genus Ursus, the projections of the skull are weakly developed; the sagittal crest is low and short, even in old specimens, and does not exceed more than...

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Temporalis muscle

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skull all the way up to the medial line. There, it may be attached to a sagittal crest, as can be seen in early hominins such as Paranthropus aethiopicus....

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Malayan tapir

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eyesight, but excellent hearing and sense of smell. It has a large sagittal crest, a bone running along the middle of the skull that is necessary for...

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Canidae

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lambdoidal ridge at the rear of the cranium and in some species, a sagittal crest running from front to back. The bony orbits around the eye never form...

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