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Triceratops sexual meaning


Triceratops is a genus of herbivorous ceratopsid dinosaur that first appeared during the late Maastrichtian stage of the late Cretaceous periodabout 68 million years ago mya in what is now North America. It is one of the last known non-avian dinosaur genera, and became extinct Triceratops sexual meaning the Cretaceous—Paleogene extinction event 66 million years ago.

It has been documented by numerous remains collected since the genus was first described inincluding at least one complete individual skeleton. Bearing a large bony frill and three horns on its large four-legged body, and possessing similarities with the modern rhinocerosTriceratops is one of the most recognizable of all dinosaurs and the best known ceratopsid. It shared the landscape with and was probably preyed upon by Tyrannosaurus[7] though it is less certain that the two did battle in the manner often depicted in traditional museum displays and popular images.

The functions of the frills and three distinctive facial horns on its head Triceratops sexual meaning long inspired debate. Traditionally, these have been viewed as defensive weapons against predators. More recent theories, noting the presence of blood vessels in the skull bones of ceratopsids, find it more probable that these features were primarily used in identification, courtship and dominance displays, much like the antlers and horns of modern reindeermountain goatsor rhinoceros beetles.

The exact placement of the genus Triceratops within the ceratopsid group has been debated by paleontologists. Two speciesT. Research published in suggested that the contemporaneous Torosaurusa ceratopsid long regarded as a separate genus, represents Triceratops in its mature form.

Individual Triceratops are estimated to have reached about 7. Paul to have massed 9. Most other ceratopsids had large fenestrae in their frills, while those of Triceratops were noticeably solid. Triceratops species possessed a sturdy build, with strong limbs, short hands with three hooves each, and short feet with four hooves each. Originally, it was believed that the front legs of the animal had to be sprawling at angles from the thorax in order to better bear the weight of the head.

Ichnological evidence in the Triceratops sexual meaning of trackways from horned dinosaurs and recent reconstructions of skeletons both physical and digital seem to show that Triceratops and other ceratopsids maintained an upright stance during normal locomotion, with the elbows flexed and slightly bowed out, in an intermediate state between fully upright and fully sprawling as Triceratops sexual meaning the modern rhinoceros.

The hands and forearms of Triceratops retained a fairly primitive structure compared to other quadrupedal dinosaurs such as thyreophorans and many sauropods. In Triceratops sexual meaning two groups, the forelimbs of quadrupedal species were usually rotated so that the hands faced forward with palms backward "pronated" as the animals walked.

Triceratopslike other ceratopsians and the related Triceratops sexual meaning ornithopodswalked with most of their fingers pointing out and away from the body, the primitive condition for dinosaurs also retained by bipedal forms like the theropods.

Triceratops is a genus of...

In Triceratopsthe weight of the body was carried by only the first three fingers of the hand, while digits 4 and 5 were vestigial and "Triceratops sexual meaning" claws or hooves. The first named specimen now attributed to Triceratops is a pair of brow horns attached to a skull roof, found near Denver, Colorado in the spring of It took a third and much more complete skull to change his mind. The specimen, collected in by John Bell Hatcher from the Lance Formation of Wyomingwas initially described as another species of Ceratops.

The sturdy nature of the animal's Triceratops sexual meaning has ensured that many examples have been preserved as fossilsallowing variations between species and individuals to be studied.

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Triceratops remains have subsequently been found in the American states of Montana and South Dakota in addition to Colorado and Wyomingand in the provinces of Saskatchewan and AlbertaCanada. An earlier specimen, also recovered from the Lance Formation, was named Agathaumas sylvestris by Edward Drinker Cope in Originally identified as Triceratops sexual meaning hadrosaur, this specimen consists only of post-cranial remains and is only provisionally considered an example of Triceratops.

Within the first decades after Triceratops was described, various skulls were collected, which varied to a lesser or greater degree from the original Triceratopsnamed T. This variation is unsurprising, given that Triceratops skulls Triceratops sexual meaning large three-dimensional objects, coming from individuals of different ages and both sexes, and which were subjected to different amounts and directions of pressure during fossilization.

In the first attempt to understand the many species, Lull found two groups, although he did not say how he distinguished them: Sternberg made one modification, adding T. With time, the idea that the differing skulls might be representative of individual variation within one or two species gained popularity.

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