ɪt wʌz ɚɹˈɪdʒɪnəli dᵻfˈaɪnd tʊ ɪŋklˈuːd dˌɪnəsˈɔːɹɪfˌɔːɹmz ænd lˈædʒɚpˌɛɾɪdz, wɪð lˈeɪɾɚ fˌɔːɹmjʊlˈeɪʃənz spəsˈɪfɪkli ɛksklˈuːdɪŋ tˈɛɹəsˌɔːɹz fɹʌmðə ɡɹˈuːp.
It was originally defined to include dinosauriforms and lagerpetids, with later formulations specifically excluding pterosaurs from the group.