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Reptilia - Laosauridae
It was synonymized subjectively with Camptosauridae by Hay (1902); it was synonymized subjectively with Hypsilophodontidae by Kuhn (1964).
It was assigned to Iguanodontia by Osborn (1923); and to Ornithopoda by Marsh (1895), Marsh (1896), Huene (1914) and Tatarinov (1964).
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.