sˈɪnɐpsˌɪdə ɪz ðə ɡɹˈuːp ɔːɹ klˈeɪd ðæt ɪŋklˈuːdz mˈæməlz, bˌʌt ðə tˈɜːm ɪz mˈeɪnli jˈuːzd tə ɹᵻfˈɜː tʊ ɪts ˈɜːlɪɪst mˈɛmbɚz.
Synapsida is the group (or clade) that includes mammals, but the term is mainly used to refer to its earliest members.