Another crocodile-like fish-eater, Suchomimus, was described in 1998, and placed together with Baryonyx in the subfamily Baryonychinae The Baryonychinae is a subdivision of the family Spinosauridae, which contains other giant Cretaceous forms from Africa and South America, including the genera Spinosaurus and Irritator. In 2004, paleontologists Hutt and Newbery suggested that Suchomimus tenerensis should be redefined as Baryonyx tenerensis due to new discoveries that showed the vertebrae of Baryonyx were more similar to those of Suchomimus than previously thought. File:Feeding-Mechanics-in-Spinosaurid-Theropods-and-Extant-Crocodilians-pone.0065295.s005.ogv
CT scan of the holotype snout Close up of restored head and arm
Additionally, the similarity between Baryonyx and Suchosaurus was noted by Buffetaut in 2007. Remains long attributed to Suchosaurus are now assigned to Baryonyx, and it is difficult to distinguish between remains of these two dinosaurs. Some minor differences do exist, such as ridges on the teeth of Suchosaurus. However,a similar range of variation exists among Baryonyx specimens,and even among various teeth assigned to the related Spinosaurus. Buffetaut suggested that this could mean that either various Baryonyx specimens should be broken up into separate taxa, or that Suchosaurus could be a senior synonym of Baryonyx. Buffetaut noted that if this is the case, the name Baryonyx would be replaced with Suchosaurus, which could be problematic given that the holotype specimen of Suchosaurus is only a single, worn tooth.
The following cladogram shows a 2010 analysis of the Megalosauroidea.
Another crocodile-like fish-eater, Suchomimus, was described in 1998, and placed together with Baryonyx in the subfamily Baryonychinae The Baryonychinae is a subdivision of the family Spinosauridae, which contains other giant Cretaceous forms from Africa and South America, including the genera Spinosaurus and Irritator. In 2004, paleontologists Hutt and Newbery suggested that Suchomimus tenerensis should be redefined as Baryonyx tenerensis due to new discoveries that showed the vertebrae of Baryonyx were more similar to those of Suchomimus than previously thought. File:Feeding-Mechanics-in-Spinosaurid-Theropods-and-Extant-Crocodilians-pone.0065295.s005.ogvCT scan of the holotype snout Close up of restored head and armAdditionally, the similarity between Baryonyx and Suchosaurus was noted by Buffetaut in 2007. Remains long attributed to Suchosaurus are now assigned to Baryonyx, and it is difficult to distinguish between remains of these two dinosaurs. Some minor differences do exist, such as ridges on the teeth of Suchosaurus. However,a similar range of variation exists among Baryonyx specimens,and even among various teeth assigned to the related Spinosaurus. Buffetaut suggested that this could mean that either various Baryonyx specimens should be broken up into separate taxa, or that Suchosaurus could be a senior synonym of Baryonyx. Buffetaut noted that if this is the case, the name Baryonyx would be replaced with Suchosaurus, which could be problematic given that the holotype specimen of Suchosaurus is only a single, worn tooth.The following cladogram shows a 2010 analysis of the Megalosauroidea.
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