Apatosaurus: Difference between revisions

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Corrected the years in which Apatosaurus lived and co existed with Brachiosaurus, Camarasaurus, Diplodocus, Stegosaurus, Camptosaurus, Allosaurus, Torvosaurus and Ceratosaurus.
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m revert; that contradicts the text
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{{Use mdy dates|date=January 2024}}
{{Automatic taxobox
| fossil_range = [[Late Jurassic]] ([[Kimmeridgian]] to [[Tithonian]]), {{Geological range|154152|145150}}
| image = Louisae.jpg
| image_caption = Mounted ''A. louisae'' (specimen CM 3018), [[Carnegie Museum of Natural History]]
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}}
 
'''''Apatosaurus''''' ({{IPAc-en|ə|ˌ|p|æ|t|ə|ˈ|s|ɔːr|ə|s}};<ref>{{MerriamWebsterDictionary|Apatosaurus}}</ref><ref>{{Dictionary.com|Apatosaurus}}</ref> meaning "deceptive lizard") is a [[genus]] of [[herbivore|herbivorous]] [[sauropod]] [[dinosaur]] that lived in [[Laurentia|North America]] during the [[Late Jurassic]] [[period (geology)|period]]. [[Othniel Charles Marsh]] described and named the first-known species, '''''A. ajax''''', in 1877, and a second species, '''''A. louisae''''', was discovered and named by William H. Holland in 1916. ''Apatosaurus'' lived about 154152 to 145151 million years ago (mya), during the late [[Kimmeridgian]] to early [[Tithonian]] age, and are now known from [[fossil]]s in the [[Morrison Formation]] of modern-day [[Colorado]], [[Oklahoma]], [[New Mexico]], [[Wyoming]], and [[Utah]] in the United States. ''Apatosaurus'' had an average length of {{convert|21|-|23|m|ft|abbr=on}}, and an average mass of {{convert|16.4|-|22.4|t|LT ST|abbr=on}}. A few specimens indicate a maximum length of 11–30% greater than average and a mass of approximately {{convert|33|t|LT ST|abbr=on}}.
 
The [[cervical vertebrae]] of ''Apatosaurus'' are less elongated and more heavily constructed than those of ''[[Diplodocus]]'', a [[diplodocid]] like ''Apatosaurus'', and the bones of the leg are much stockier despite being longer, implying that ''Apatosaurus'' was a more robust animal. The tail was held above the ground during normal locomotion. ''Apatosaurus'' had a single [[claw]] on each forelimb and three on each hindlimb. The ''Apatosaurus'' skull, long thought to be similar to ''[[Camarasaurus]]'', is much more similar to that of ''Diplodocus''. ''Apatosaurus'' was a generalized [[browsing (herbivory)|browser]] that likely held its head elevated. To lighten its vertebrae, ''Apatosaurus'' had [[air sacs]] that made the bones internally full of holes. Like that of other diplodocids, its tail may have been used as a whip to create loud noises, or, as more recently suggested, as a sensory organ.