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It was reranked as the suborder Symphypoda by Cope (1870), Cope (1871), Cope (1875), Seeley (1879) and Osborn (1904); it was synonymized subjectively with Theropoda by Zittel (1890); it was synonymized subjectively with Coelurosauria by Matthew (1915); it was synonymized subjectively with Coeluridae by Steel (1970).
It was assigned to Dinosauria by Cope (1867), Cope (1870), Cope (1871), Cope (1875) and Seeley (1879); and to Theropoda by Osborn (1904).
If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.