ðeɪ wɜː ɹᵻmˈuːvd bɪkˈʌz ðeɪ wɜː θˈɔːt təbi mˈoːɹ klˈoʊsli ɹᵻlˈeɪɾᵻd tə ðə nˌiːoʊtɹˈɑːpɪkəl ɐspɹˈɛdɪnˌɪdiː ðɐn tə ðə ɹᵻmˈeɪnɪŋ sˈɪsoːɹˌɪdz dˈuː tʊ ɐ nˈʌmbɚɹ ʌv mˌɔːɹfəlˈɑːdʒɪkəl kˈæɹɪktɚz.
They were removed because they were thought to be more closely related to the neotropical Aspredinidae than to the remaining sisorids due to a number of morphological characters.