pˌɪsɐnəsˈɔːɹəs, tɹɐdˈɪʃənəli kənsˈɪdɚd ɐn ˌɔːɹnɪθˈɪskiən, wʌz ɹᵻkˈʌvɚd ɪn ɐn ʌnpˈʌblɪʃt ɐnˈæləsˌɪs æz ɐ dˌɪnəsˈɔːɹɪfˌɔːɹm aʊtsˈaɪd ˈʌðɚ klˈeɪdz, bˌʌt hɐz sˈɪns bˌɪn ɹᵻkˈʌvɚd ˈoʊnli æz ɐ mˈɛmbɚɹ ʌv saɪlsˈɔːɹɪdˌiː ɔːɹ ˌɔːɹnɪθˈɪskiə.
Pisanosaurus, traditionally considered an ornithischian, was recovered in an unpublished analysis as a dinosauriform outside other clades, but has since been recovered only as a member of Silesauridae or Ornithischia.