lˈuːɪsˌʌtʃəs, ɐ kɑːɹnˈɪvɚɹəs fˈɔːɹm, wʌz fˈaʊnd təbi ðə mˈoʊst pɹˈɪmᵻtˌɪv fˈɔːɹm ʌv ˌɔːɹnɪθˈɪskiən, wˌɪtʃ wʌz ˈɔːlmoʊst jˌuːnɪvˈɜːsəli kənsˈɪdɚd təbi ɐn ˈoʊnlihɜːbˈɪvɚɹəs klˈeɪd bᵻfˈoːɹ.
Lewisuchus, a carnivorous form, was found to be the most primitive form of ornithischian, which was almost universally considered to be an only-herbivorous clade before.