ðɛɹ ɪz ɐn ˈiːvən ʃˈɑːɹpɚ dᵻbˈeɪt ɐbˌaʊt wˈɛðɚ wɪwˈeɪksiə, fɹʌm ɐbˈaʊt , wʌzɐ mˈɑːlʌsk, ænd mˈʌtʃ ʌv ðɪs sˈɛntɚz ˌɔn wˈɛðɚɹ ɪts fˈiːdɪŋ ˌæpɚɹˈæɾəs wʌzɐ tˈaɪp ʌv ɹˈædʒələ ɔːɹ mˈoːɹ sˈɪmɪlɚ tə ðæt ʌv sˌʌm pˌɑːlɪkˈiːt wˈɜːmz.
There is an even sharper debate about whether Wiwaxia, from about , was a mollusc, and much of this centers on whether its feeding apparatus was a type of radula or more similar to that of some polychaete worms.