All modern amphibians are included in the subclass Lissamphibia, which is usually considered a clade, a group of species that have evolved from a common ancestor.
ˈɔːl mˈɑːdɚn æmfˈɪbiənz ɑːɹ ɪŋklˈuːdᵻd ɪnðə sˈʌbklæs lˌɪsɐmfˈɪbiə, wˌɪtʃ ɪz jˈuːʒuːəli kənsˈɪdɚd ɐ klˈeɪd, ɐ ɡɹˈuːp ʌv spˈiːsiːz ðæt hæv ɪvˈɑːlvd fɹʌm ɐ kˈɑːmən ˈænsɛstɚ.