calling it Betasuchus (or "B crocodile" in Greek). In 2017 its length was estimated to be 4 meters (13 feet). Phylogeny Betasuchus is known only from a single incomplete femur, so its exact relationships with other theropods have been difficult to determine. In 1972 Dale Russell confirmed Von Huene's opinion that Betasuchus was an ornithomimosaurid, but also considered the name a nomen vanum: a failed emendation. Some workers in reference to the material still use M. bredai instead of Betasuchus. David Norman in 1990 listed Megalosaurus bredai as a nomen dubium. Jean le Loeuff and Eric Buffetaut in 1991 concluded it was a small abelisaurid, close to Tarascosaurus and that it was distinct enough not to consider it a nomen dubium: they mentioned a more narrow femoral neck, a lack of orientation of the femoral head towards the front, the lack of an opening, or foramen, under the lesser trochanter and that the anterior face is narrower. Furthermore, at the lower end the beginnings of an anterointernal crest are visible, seeming to be homologous to the supracondylar crest of the femur of Carnotaurus. They rejected the placement within Ornithomimidae, partly because of the much higher position of the fourth trochanter on the back of the femur. In 1997 Betasuchus was concluded by Carpenter, Russell and Baird to be related to Dryptosaurus, a tyrannosauroid. In 2004 Tykoski and Rowe placed Tarascosaurus within the Abelisauroidea. See also Timeline of ceratosaur research Footnotes References Seeley (1883). "On the dinosaurs from the Maastricht beds." Q. J. Geol. Soc. London, 39: 246-253. Ubaghs, C. 1892. "Sur l'origine des vallées du Limbourg hollandais". Extract Mém. Soc. belge Géol. VI; pp. 150–169 C. Ubaghs, "Le Megalosaurus dans la craie supérieure du Limbourg", Bull. Soc. belge Géol. Paléont. Hydrol. 6 (1893) 26–29. Von Huene, F. (1926). "The carnivorous Saurischia in the Jura and Cretaceous formations, principally in Europe". Revista del Museo de La Plata 29:35-167 Von Huene (1932). "Die fossile Reptil-Ordnung Saurischia, ihre Entwicklung und Geschichte." Monogr. Geol. Palaeontol. (Pt. I and II, Ser. I) 4, 1-361. Russell, D.A. (1972). "Ostrich dinosaurs from the Late Cretaceous of western Canada". Canadian Journal of Earth Sciences 9: 375–402 Norman, D.B., Problematic Theropoda: "Coelurosaurs" in D.B. Weishampel, P. Dodson, H. Osmólska (eds), The Dinosauria, University of California Press, Berkeley, CA, 1990, Ch. 13 Jean le Loeuff and Eric Buffetaut (1991). "Tarascosaurus salluvicus nov. gen., nov. sp.,dinosaure théropode du Crétacé supérieur du