Some other heterotrophic organisms, such as the apicomplexans, are also derived from cells whose ancestors possessed plastids, but are not traditionally considered as algae.
sˌʌm ˈʌðɚ hˌɛɾɚɹətɹˈoʊfɪk ˈɔːɹɡənˌɪzəmz, sˈʌtʃ ɐz ðɪ ˈæpɪkˌɑːmplɛksənz, ɑːɹ ˈɔːlsoʊ dᵻɹˈaɪvd fɹʌm sˈɛlz hˌuːz ˈænsɛstɚz pəzˈɛst plˈæstɪdz, bˌʌt ɑːɹ nˌɑːt tɹɐdˈɪʃənəli kənsˈɪdɚd æz ˈælɡiː.