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Proceratosaurus - Was not a Ceratosaurian. It was actually a primitive Tryannosaurid, and they never bothered renaming it.

Sinraptor - Means "Chinese raptor" but isn't a Dromaeosaurid (true raptor), though there are other non-dromaeosaurids with raptor in their name, but when they found an actual Dromaeosaurid in China, instead of calling it "Anything else"-Raptor, they named it Sinornithosaurus, meaning "Chinese bird lizard". They kept the "Chinese" part and ditched the "raptor" part. 

Saurus means lizard, which has lost absolutely all of it's meaning. I'm pretty sure there are more non-lizard Saurus's than lizards with that suffix. They've even included it in the name of at least one mammal (Basilosaurus).

Not necessarily about dinosaurs per se, but the lineage of Archosaurs that led to Crocodylomorphs has been traditionally referred to as Crurotarsans and has included Phytosaurs. From my understanding, later studies determined that the crurotarsal ankle is actually an ancestral trait to all Archosaurs which was lost in the Avemetatarsalian lineage, which led to birds. The clade Crurotarsan now includes all Archosaurs and Phytosaurs which are now considered Archosauriformes. The name that is now used when referring to the croc-lineage of Archosaurs is Pseudosuchians. Please let me know if you think that I'm wrong about that.

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