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Description
Apatosaurus ajax - This one comes out much larger than most think...
Temporal range: Late Jurassic, Tithonian, ~152-150 Ma
Length: Est. >=30? metres
Probable mass: >=50? tonnes
Etymology: Ajax's deceptive reptile
Apatosaurus ajax is a species of large diplodocoid sauropod dinosaur that lived in what is now the Morrison Formation in North America. It was more robust than most other diplodocids. It was named after the Greek mythological hero Ajax.
Like that of other diplodocids, its tail may have been used as a whip to create loud noises and to defend itself against attackers. The sound produced by the whip of its tail probably reached over 200 decibels, making Apatosaurus the loudest creature known to science - the blue whale, the loudest living creature, produces sounds at about ~188 decibels. The massive sauropod could probably kill a human with only the sound of its whip, if it weren't for the fact that it lived over 150 million years before the first humans. Direct impact from its tail would likely have liquefied parts on contact.
Commonly estimated at between ~20-25 metres in length with a mass of ~20-30 tonnes, some specimens indicate that it grew much larger than this. Elements from those specimens, such as OMNH 1670, are all ~11-30% dimensionally larger than the equivalent bones from CM 3018, the mounted Apatosaurus louisae specimen at the Carnegie Museum. OMNH 1670 is a isolated fifth dorsal vertebra that indicates a creature more than 30 metres long, with a probable mass of roughly ~50-60 tonnes, give or take a few.
A recent study in late 2015 indicates that apatosaurines, including Apatosaurus ajax, used their necks, which may have had studs or spikes, for combat.
______________
Based on
's Apatosaurus ajax
Based on Scott Hartman's skeletal reconstruction, OMNH 1670 scales to about ~32ish meters long in axial length. Information about OMNH 1670 can be found here:
svpow.com/2012/04/25/the-giant…
svpow.com/2012/04/30/the-giant…
______________
UPDATE(9/8/2015): A minor tweak.
UPDATE(4/5/2016): Added neck spikes for #BRONTOSMASH
Previous version
UPDATE(8/29/2016): Softened shadows
Previous version
UPDATE(3/15/2017): A complete remake.
Previous version
Temporal range: Late Jurassic, Tithonian, ~152-150 Ma
Length: Est. >=30? metres
Probable mass: >=50? tonnes
Etymology: Ajax's deceptive reptile
Apatosaurus ajax is a species of large diplodocoid sauropod dinosaur that lived in what is now the Morrison Formation in North America. It was more robust than most other diplodocids. It was named after the Greek mythological hero Ajax.
Like that of other diplodocids, its tail may have been used as a whip to create loud noises and to defend itself against attackers. The sound produced by the whip of its tail probably reached over 200 decibels, making Apatosaurus the loudest creature known to science - the blue whale, the loudest living creature, produces sounds at about ~188 decibels. The massive sauropod could probably kill a human with only the sound of its whip, if it weren't for the fact that it lived over 150 million years before the first humans. Direct impact from its tail would likely have liquefied parts on contact.
Commonly estimated at between ~20-25 metres in length with a mass of ~20-30 tonnes, some specimens indicate that it grew much larger than this. Elements from those specimens, such as OMNH 1670, are all ~11-30% dimensionally larger than the equivalent bones from CM 3018, the mounted Apatosaurus louisae specimen at the Carnegie Museum. OMNH 1670 is a isolated fifth dorsal vertebra that indicates a creature more than 30 metres long, with a probable mass of roughly ~50-60 tonnes, give or take a few.
These giant apatosaurs were immature when they died. OMNH 1329 has a visible neurocentral fusion line, all of which were remodeled away in CM3018. A very large cervical rib, OMNH 1368, is unfused. In neosauropods, neurocentral fusion precedes fusion of the cervical ribs. In Diplodocus and Giraffatitan, the largest individuals with unfused cervical ribs are less than 80% the linear size of the largest known individuals. Assuming that this applies to Apatosaurus, an adult Apatosaurus ajax could probably reach lengths of around ~35-40 metres and masses in the region of ~90-110 tonnes, rivalling or even exceeding the largest titanosaurs in size.
A recent study in late 2015 indicates that apatosaurines, including Apatosaurus ajax, used their necks, which may have had studs or spikes, for combat.
______________
Based on
's Apatosaurus ajaxBased on Scott Hartman's skeletal reconstruction, OMNH 1670 scales to about ~32ish meters long in axial length. Information about OMNH 1670 can be found here:
svpow.com/2012/04/25/the-giant…
svpow.com/2012/04/30/the-giant…
______________
UPDATE(9/8/2015): A minor tweak.
UPDATE(4/5/2016): Added neck spikes for #BRONTOSMASH
Previous version
UPDATE(8/29/2016): Softened shadows
Previous version
UPDATE(3/15/2017): A complete remake.
Previous version
Image size
3728x1410px 2.51 MB
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Comments26
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I really like the choice of color schemes on this guy. Nice work!
Wouldn't the neck spikes be a bit bigger than that though? Maybe it's just me, but they look a little puny.