The oldest known caecilians are Funcusvermis gilmorei (from the Late Triassic) and Eocaecilia micropodia (from the Early Jurassic), both from Arizona.
ðɪ ˈoʊldɪst nˈoʊn kiːsˈɪliənz ɑːɹ fˈʌŋkəsvɚmˌɪs ɡˈɪlmoːɹˌeɪ fɹʌmðə lˈeɪt tɹaɪˈæsɪk ænd ˌiːəkiːsˈɪliə mˌaɪkɹoʊpˈoʊdiə fɹʌmðɪ ˈɜːli dʒjʊɹɹˈæsɪk, bˈoʊθ fɹʌm ˌæɹɪzˈoʊnə.