Tyrannotitan chubutensis skeletal reconstructions

Tyrannotitan chubutensis ("Tyrant titan from Chubut") is a species of giant theropod dinosaur that lived in what is now Argentina during the Middle Cretaceous period.

The skull is reconstructed after Carcharodontosaurus, Giganotosaurus, and Acrocanthosaurus.

The neck and tail are based on Giganotosaurus, while the scapula is restored based on Mapusaurus and Acrocanthosaurus. The ilium, ischium, and tibia are restored based on Mapusaurus, and the feet are restored based on Acrocanthosaurus and Mapusaurus.

The sternum and gastralia are generic theropod parts. Bones in light grey are those that are preserved but not illustrated.

The left and right femora, second toe, and 13th dorsal rib have been swapped as the preserved elements (illustrated in the case of the holotype femora) would have been obscured in favour of the unpreserved ones (unillustrated regarding the holotype femora) otherwise.

The resulting animal is one of the oddest of the known carcharodontosaurids. The skull fragments of the paratype Tyrannotitan, despite their fragmentary nature, indicates a massive head. Combined with its long pubis, tall neural spines, and short dorsal vertebrae, this results in an animal with a proportionally huge head and a short but very deep body.

Thanks goes to for his help in the making of the skeletal reconstruction, as well as his Tyrannotitan skeletal reconstruction which was used as a general basis for this reconstruction.

Reconstructed dimensions

• MPEF-PV 1156
• Hip height: ~3.12 metres
• Shoulder height: ~2.92 metres
• Total height: ~3.34 metres
• Standing length: ~10.68 metres
• Axial length: ~10.96 metres
• MPEF-PV 1157
• Hip height: ~3.45 metres
• Shoulder height: ~3.22 metres
• Back height: ~3.56 metres
• Total height: ~3.62 metres
• Standing length: ~11.45 metres
• Axial length: ~11.73 metres

References

• Coria and Salgado, 1995, "A new giant carnivorous dinosaur from the Cretaceous of Patagonia"
• Sereno, 1996, "Predatory dinosaurs from the Sahara and Late Cretaceous faunal differentiation"
• Currie & Carpenter, 2000, "A new specimen of Acrocanthosaurus atokensis (Theropoda, Dinosauria) from the Lower Cretaceous Antlers Formation (Lower Cretaceous, Aptian) of Oklahoma, USA"
• Novas et al., 2005, "A large Cretaceous theropod from Patagonia, Argentina, and the evolution of carcharodontosaurids"
• Coria and Currie, 2006, "A new carcharodontosaurid (Dinosauria, Theropoda) from the Upper Cretaceous of Argentina"
• Eddy & Clarke, 2011, "New information on the cranial anatomy of Acrocanthosaurus atokensis and its implications for the phylogeny of Allosauroidea (Dinosauria: Theropoda)"
• Canale et al., 2013, "Osteology and phylogenetic relationships of Tyrannotitan chubutensis Novas, de Valais, Vickers-Rich and Rich, 2005 (Theropoda: Carcharodontosauridae) from the Lower Cretaceous of Patagonia, Argentina"
• Ibrahim et al., 2020, "Geology and paleontology of the Upper Cretaceous Kem Kem Group of eastern Morocco"
• Franoys' Tyrannotitan
• Scott Hartman's Giganotosaurus

Update log

• 1/24/2018: Added detail and reposed. See previous version here for comparison.
• 3/19/2018: Added furculae, some tweaks to silhouette, teeth and scalebar updated to my new conventions.
• 6/3/2021: Remade skull due to newer data.
• 11/17/2021: Changed from a 9-cervical/14-dorsal to a more standard tetanuran 10-cervical/13-dorsal configuration, as well as some other small tweaks (mainly a bit more muscle on the top of the neck).