After Whittington, Chang, Dean, Fortey, Jell, Laurie, Palmer, Repina, Rushton & Shergold, 1997

Olenellina Walcott, 1890b
    †Olenellidiae Walcott, 1890b
    †Mesonacidae Walcott, 1890b
    †Mesonacidae Walcott; Walcott, 1910
    †Mesonacida Walcott; Swinnerton, 1915
    †Mesonacida Walcott; Poulsen, 1927
    †OlenellidaeWalcott;  Richter & Richter, 1941a
    †Protoparia Størmer, 1942 non Swinnerton, 1915
    †Olenellacea Walcott; Henningsmoen, 1951
    †Olenellacea Walcott; Bergström, 1973a
    †Olenellacea Walcott; Bergström, 1973b
    †Olenelloidea Walcott; Hupé, 1953a
    †Olenellida Walcott; Bergström, 1973a
    †Olenellida Walcott; Bergström, 1973a
    †Olenellida Walcott; Ahlberg, Bergström & Johansson, 1986
    †Olenelloidea Walcott; Repina, 1979
    †Olenellina Walcott; nom. correct. et transl. Palmer & Repina, 1993 pro Olenellidiae Walcott, 1890b
    †Olenellina Walcott; Whittington et al., 1997

    †Fallotaspidoidea Hupé, 1953
        †Daguinaspidae Hupé, 1953a
        †Olenellidae Walcott, 1890b; Poulsen in Moore, 1959, in partimDaguinaspididae Hupé; Poulsen in Moore, 1959
        †Daguinaspididae Hupé; Bergström, 1973b, in partimOlenelloidea Walcott; Suvorova in Tchernysheva, 1960, in partimOlenelloidea Walcott; Repina, 1979, in partimOlenellida Walcott; Ahlberg, Bergström & Johansson, 1986, in partimFallotaspidoidea Hupé; Palmer & Repina, 1993, nom. transl. ex Fallotaspidinae, Hupé, 1953a
        †Fallotaspidoidea Hupé; Whittington et al., 1997

        †Fallotaspididae Hupé, 1953a
            †Daguinaspidae Hupé, 1953a
            †Fallotaspidinae Hupé, 1953a; Poulsen in Moore, 1959
            †Holmiinae Hupé, 1953a; Suvorova in Tchernysheva, 1960, in partimDaguinaspididae Hupé; Bergström, 1973b, in partimDaguinaspididae Hupé; Ahlberg, Bergström & Johansson, 1986, in partimFallotaspididae Hupé; Repina, 1979, nom. transl. ex Fallotaspidinae Hupé, 1953a
            †Fallotaspididae Hupé; Whittington, et al., 1997

            †Fallotaspidinae Hupé, 1953a
                †Fallotaspidinae Hupé, 1953a
                †Fallotaspidinae Hupé; Poulsen in Moore, 1959
                †Fallotaspidinae Hupé; Bergström, 1973b, in partimFallotaspidinae Hupé; Ahlberg, Bergström & Johansson, 1986, in partimFallotaspidinae Hupé; Palmer & Repina, 1993
                †Holmiinae Hupé, 1953a; Suvorova in Tchernysheva, 1960, in partimFallotaspididae Hupé; Repina, 1979, in partimFallotaspidinae Hupé; Whittington et al., 1997

            †Daguinaspidinae Hupé, 1953a
                †Daguinaspinae Hupé, 1953a
                †Daguinaspididae Hupé; Poulsen in Moore, 1959, nom. correct. ex Daguinaspinae Hupe, 1953a
                †Holmiinae Hupé, 1953a; Suvorova in Tchernysheva, 1960, in partimDaguinaspididae Hupé; Bergström, 1973b, in partimDaguinaspididae Hupé; Repina, 1979, in partimDaguinaspididae Hupé; Ahlberg, Bergström & Johansson, 1986, in partimDaguinaspidinae Hupé; Palmer & Repina, 1993
                †Daguinaspidinae Hupé; Whittington et al., 1997

        †Archaeaspididae Repina, 1979
            †Archaeaspididae Repina, 1979
            †Archaeaspidinae Repina; Ahlberg, Bergström & Johansson, 1986
            †Archaeaspididae Repina; Palmer & Repina, 1993
            †Archaeaspididae Repina; Whittington et al., 1997

        †Judomiidae Repina, 1979
            †Judomiinae Repina, 1979
            †Callaviinae Poulsen in Moore, 1959
            †Holmiinae Hupé, 1953a; Suvorova in Tchernysheva, 1960, in partimNevadiinae Hupé, 1953a; Bergström, 1973b, in partimHolmiidae Hupé, 1953a; Bergström, 1973b, in partimJudomiinae Repina; Ahlberg, Bergström & Johansson, 1986
            †Judomiidae Repina; Palmer & Repina, 1993, nom. transl. ex Judomiinae Repina, 1979
            †Judomiidae Repina; Whittington et al., 1997

        †Neltneriidae Hupé, 1953a
            †Neltneriinae Hupé, 1953a
            †Neltneriinae Hupé; Poulsen in Moore, 1959, in partimHolmiinae Hupé, 1953a; Poulsen in Moore, 1959, in partimHolmiinae Hupé; Suvorova in Tchernysheva, 1960, in partimNeltneriinae Hupé; Bergström, 1973b, in partimHolmiinae Hupé; Repina, 1979, in partimNeltneriinae Hupé; Repina, 1979, in partimHolmiinae Hupé; Ahlberg, Bergström & Johansson, 1986, in partimNeltneriinae Hupé; Ahlberg, Bergström & Johansson, 1986, in partimNeltneriidae Hupé; Palmer & Repina, 1993, nom. transl. ex Neltneriinae Hupé, 1953a
            †Neltneriidae Hupé; Whittington et al., 1997

        †Nevadiidae Hupé, 1953a
            †Nevadiinae Hupé, 1953a
            †Nevadiinae Hupé; Poulsen in Moore, 1959
            †Nevadiinae Hupé; Suvorova in Tchernysheva, 1960
            †Nevadiinae Hupé; Bergström, 1973b, in partimNevadiidae Hupé; Repina, 1979, nom. transl. ex Nevadiinae Hupé, 1953a, in partimNevadiidae Hupé; Ahlberg, Bergström & Johansson, 1986, in partimNevadiidae Hupé; Palmer & repina, 1993
            †Nevadiidae Hupé; Whittington et al, 1997
            †Nevadioidea Hupé; Lieberman, 2001, nom. transl. ex Nevadiinae Hupé, 1953a

    †Olenelloidea Walcott, 1890b
        †Olenellidiae Walcott, 1890b
        †OlenellidaeWalcott; Richter & Richter, 1941a, in partimOlenellacea Walcott; Henningsmoen, 1951, in partimOlenellacea Walcott; Bergström, 1973b, in partimOlenelloidea Walcott; Hupé, 1953a, in partimOlenelloidea Walcott; Suvorova in Tchernysheva, 1960, in partimOlenelloidea Walcott; Repina, 1979, in partimOlenelloidea Walcott; Whittington, 1989, in partimOlenelloidea Walcott; Palmer & Repina, 1993, in partimOlenelloidea Walcott; Whittington et al., 1997

        Olenellidae Walcott, 1890b sensu Repina, 1979
            †Olenellidiae Walcott, 1890b
            †Mesonacidiae Walcott, 1890b
            †Mesonacidiae Walcott; Walcott, 1910, in partimOlenellidae Walcott; Hupé, 1953a
            †Olenellidae Walcott; Poulsen in Moore, 1959
            †Olenellidae Walcott; Suvorova in Tchernysheva, 1960, in partimOlenellidae Walcott; Bergström, 1973b, in partimOlenellidae Walcott; Ahlberg, Bergström & Johansson, 1986
            †Olenellidae Walcott; Palmer & Repina, 1993
            †Olenellidae Walcott; Whittington et al., 1997

            †Olenellinae Walcott, 1890b
                †Olenellinae Walcott; Poulsen in Moore, 1959, in partimOlenellinae Walcott; Suvorova in Tchernysheva, 1960, in partimOlenellinae Walcott; Repina, 1979, in partimFremontiinae Repina, 1979, in partimFremontiinae Repina; Palmer & Repina, 1993
                †Olenellinae Walcott; Whittington et al., 1997

            †Biceratopsinae Pack & Gayle, 1971
                †Olenellidae Walcott; Bergström, 1973b, in partimOlenellidae Walcott; Ahlberg, Bergström & Johansson, 1986, in partimBiceratopsinae Pack & Gayle, 1971; Repina, 1979
                †Biceratopsinae Pack & Gayle; Palmer & Repina, 1993
                †Biceratopsinae Pack & Gayle; Whittington et al., 1997

            †Bristoliinae Palmer & Repina, 1993
                †Olenellidae Walcott; Poulsen in Moore, 1959, in partimOlenellidae Walcott; Bergström, 1973b, in partimOlenellidae Walcott; Ahlberg, Bergström & Johansson, 1986, in partimFremontiinae Repina, 1979, in partimBristoliinae Palmer & Repina, 1993
                †Bristoliinae Palmer & Repina; Whittington et al., 1997

            †Laudoniinae Palmer & Repina, 1993
                †Laudoniinae Palmer & Repina, 1993
                †Laudoniinae Palmer & Repina; Whittington et al., 1997

            †Wanneriinae Hupé, 1953
                †Olenellinae Walcott; Suvorova in Tchernysheva, 1960, in partimHolmiidae Hupé, 1953; Bergström, 1973b, in partimWanneriidae Hupé, 1953; Ahlberg, Bergström & Johansson, 1986, in partimWanneriinae Hupé; Palmer & Repina, 1993
                †Wanneriinae Hupé; Whittington et al, 1997

        †Holmiidae Hupé, 1953a
            Holmiinae Hupé, 1953a, in partim
            Holmiinae Hupé; Poulsen in Moore, 1959, in partim
            Holmiinae Hupé; Suvorova in Tchernysheva, 1960, in partim
            Holmiidae Hupé; Bergström, 1973b nom. transl. ex Holmiinae Hupé, 1953a, in partim
            Holmiidae Hupé; Repina, 1979, in partim
            Holmiidae Hupé; Ahlberg, Bergström & Johansson, 1986, in partim
            Holmiidae Hupé; Palmer & Repina, 1993
            Callaviinae Poulsen in Moore, 1959, in partim
            Callaviinae Poulsen in Moore; Bergström, 1973b, in partim
            Callaviidae Poulsen in Moore; Ahlberg, Bergström & Johansson, 1986, in partim

            Holmiinae Hupé, 1953a
                Holmiinae Hupé, 1953a
                Holmiinae Hupé; Poulsen in Moore, 1959, in partim
                Holmiinae Hupé; Suvorova in Tchernysheva, 1960, in partim
                Holmiinae Hupé; Repina, 1979, in partim
                Holmiinae Hupé; Palmer & Repina, 1993
                Holmiidae Hupé; Ahlberg, Bergström & Johansson, 1986, in partim
                Elliptocephalinae Hupé, 1953a, in partim
                Elliptocephalinae Hupé; Poulsen in Moore, 1959, in partim
                Wanneriidae Hupé, 1953; Ahlberg, Bergström & Johansson, 1986, in partim
                Callaviinae Poulsen in Moore; Bergström, 1973b, in partim

            Callaviinae Poulsen in Moore, 1959
                Callaviinae Poulsen in Moore, 1959, in partim
                Callaviinae Poulsen in Moore; Bergström, 1973b, in partim
                Callaviinae Poulsen in Moore; Repina, 1979, in partim
                Callaviinae Poulsen in Moore; Palmer & Repina, 1993, in partim
                Callaviidae Poulsen in Moore; Ahlberg, Bergström & Johansson, 1986, in partim
                Holmiinae Hupé, 1953a, in partim
                Holmiinae Hupé; Suvorova in Tchernysheva, 1960, in partim
                Holmiidae Hupé; Repina, 1979, in partim
                Holmiidae Hupé; Ahlberg, Bergström & Johansson, 1986, in partim
                Neltneriinae Bergström, 1973b, in partim
                Callaviinae Poulsen in Moore; Whittington, et al., 1997

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