I can't understand the classification of Allosaurus. Many papers on phylogeny of carnosaurs (like this) state that it is a carnosaur right between Sinraptoridae and Carcharodontosauridae. But most make a family - allosauridae. It consists of three species - allosaurus, epanterias and saurophaganax. But some they all are synonyms, so for them the first conception is right.
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