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Carcharodontosaurus saharicus skeletals (2015)

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Description

NOTE: This reconstruction is defunct and outdated. This was produced under the idea that Carcharodontosaurus was proportioned more like Acrocanthosaurus, which, as I found later on, isn't the best option really. The skull of IPHG 1922 X 46 was also restored incorrectly and far too small. The newer skeletal reconstruction can be found here.

Carcharodontosaurus saharicus is a species of gigantic North African theropod dinosaur that lived during the Middle Cretaceous. It's name means "Saharan shark-toothed reptile". It was one of the largest theropods ever.

The missing portions were filled in based on Acrocanthosaurus.

The holotype skull ended up at a length of ~112.6 centimeters, compared to it's ~126-centimeter femur. The skull/femur ratio is ~0.8937.
Acrocanthosaurus' skull is ~129 centimeters long compared to it's ~128-centimeter femur, with a skull/femur ratio of ~1.008. Giganotosaurus has a skull/femur ratio of ~1.091, for comparison.

Despite the size difference between the holotype and SGM-Din 1, the holotype was a mature individual. The two scenarios that can be inferred, one being that the holotype was a small adult and the other being that SGM-Din 1 was a large individual, are equally likely.
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Total length measurements:

IPHG 1922: ~10.18 meters
SGM-Din 1: ~14.49 meters
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Scaling using the "Best estimate model" from Bates et al. for Acrocanthosaurus (~6177 kilograms, ~6912 liters, with an SG of ~0.912) would give you a mass of ~4.285 tonnes for IPHG 1922 and ~12.36 tonnes for SGM-Din 1.

Scaling from the "Minus 7.5%" model (~5.57 tonnes, ~6092 liters, SG of ~0.914) results in a mass of ~3.86 tonnes for IPHG 1922, and ~11.14 tonnes for SGM-Din 1.

A range of roughly around ~3.8-4.3 tonnes for IPHG 1922 and ~10-13 tonnes for SGM-Din 1 seem to be plausible.

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References/sources:

Stromer, 1931, "Wirbeltier-Reste der Baharijestufe(unterstes Cenornan). Ein skelett-rest von Carcharodontosaurus nov. gen"
Sereno, 1996, "Predatory dinosaurs from the Sahara and Late Cretaceous faunal differentiation"
J. W. Stovall, 1950, "Acrocanthosaurus atokensis, a new genus and species of Lower Cretaceous Theropoda from Oklahoma"
Carpenter, 2000, "A new specimen of Acrocanthosaurus atokensis (Theropoda, Dinosauria) from the Lower Cretaceous Antlers Formation (Lower Cretaceous, Aptian) of Oklahoma, USA"
Drew R. Eddy, Julia A. Clarke, 2011, "New information on the cranial anatomy of Acrocanthosaurus atokensis and its implications for the phylogeny of Allosauroidea (Dinosauria: Theropoda)"

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UPDATE(4/22/2015): Tweaked the scaling of the postcranials, switching over from proportionally small head to proportionally long legs. This decreased the overall size. The previous versions can still be found in my Imgur gallery.
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Phillip2001's avatar
Wow, cool Spino!! :O

Finally a big theropod. ( I think that only dinosaurs with a hip height of 4+ metres are really big.) And which hip height does this specimen have? :)

Also, since when is it known that sauropods were a little smarter than previously thought?