After Carroll, 1988, and Janvier, 1997
<==o †Pteraspidomorphi Goodrich, 1909 |-- †Anatolepis heintzi Bockelie & Fortey, 1976 `--+--o †Arandaspida Ritchie & Gilbert-Tomlinson, 1977 | |?- †Pircanchaspis rinconensis Erdtmann et al., 2000 | `--o †Arandaspididae Ritchie & Gilbert-Tomlinson, 1977 [incl. Sacabambaspidae?] | |--o †Arandaspis Ritchie & Gilbert-Tomlinson, 1977 | | |-- †A. sp. [Young, 1997] [Ordovician, Central Australia] | | `-- †A. prionotolepis Ritchie & Gilbert-Tomlinson, 1977 | |--o †Porophoraspis Ritchie & Gilbert-Tomlinson, 1977 | | |-- †P. sp. [Young, 1997] [Ordovician, Central Australia] | | `-- †P. crenulata Ritchie & Gilbert-Tomlinson, 1977 | `--+-- †Ritchieichthys nibali Sansom, Haines, Andreev & Nicoll, 2013; L.Ord. CAust. | `--o †Sacabambaspis Gagnier, Blieck & Rodrico, 1986 Ord. Aust. SWAs., ESAm. | |-- †S. sp. [Young, 1997] [Ordovician, Central Australia] | |-- †S. sp. [Sansom et al, 2009] [Ordovician, Arabian Peninsula, Oman] | |-- †S. sp. [Albanesi & Astini, 2002] [Ordovician, Argentina] | `-- †S. janvieri Gagnier, Blieck & Rodrico, 1986; Ord. ESAm. `--o †Heterostracomorphi Lankester, 1868 [Heterostraci Lankester, 1868] |-- †Astraspis desiderata Walcott, 1892 [taxonomic history] [Astraspida Berg, 1940: Astraspidiformes Berg, 1940: Astraspidae Eastman, 1917] `--+--o †Eriptychiida Ørvig, 1958 | |-- †Eriptychius americanus Walcott, 1892 [taxonomic history] [Eriptychiidae Tarlo, 1962] | `--o †Oniscolepidae Märss & Karatajute-Talimaa, 2009 | |-- †Oniscolepis dentata Pander, 1856 [taxonomic history] | `--o †Kallostrakon Lankester, 1870 | |-- †K. podura Lankester, 1870 | |-- †K. maeanuffi Tarlo, 1964 | |-- †K. grindrodi Tarlo, 1964 | `-- †K. alieni Tarlo, 1964 `--o †Heterostraci Lankester, 1868 |?- †Aserotaspis canadensis Dineley & Loeffler, 1976 |?- †Lepidaspis serrata Dineley & Loeffler, 1976 |?- †Natlaspis planicosta Dineley & Loeffler 1976 |?-o †Tesseraspis Wills, 1935 [Tesseraspidiformes: Tesseraspididae Berg, 1955] | |-- †T. tessellata Wills, 1935 | |-- †T. toombsi Tarlo, 1964 | |-- †T. mutabilis (Brotzen, 1934) | |-- †T. orvigi Tarlo, 1964 | |-- †T. denisoni Tarlo, 1964 | |-- †T. talimaae Tarlo, 1965 | `-- †T. mosaica `--+--o †Traquairaspidiformes | `--o †Traquairaspididae [incl. Weige1taspididae Brotzen, 1933] | |--o †Phialaspis Wills, 1935 [?Traquairaspis; Lophopiscis; Lophaspis; Orthaspis; Yukonaspis] | | `-- †P. symondsi [Traquairaspis symondsi] | |--o †Traquairaspis | | `-- †T. pococki | `--o †Weigeltaspis Brotzen, 1933 | |-- †W. alta Brotzen, 1933 | |-- †W. brotzeni Tarlo, 1964 | |-- †W. godmani Tarlo, 1964 | `-- †W. heintzi Tarlo, 1964 `--+--o †Tolypelepidida Denison, 1964 [Cyathaspididae: Tolypelepidinae Denison, 1964] | `--o †Tolypelepididae Denison, 1964 [Tolypelepidinae Denison, 1964] | |-- †Asketaspis interstincta Dineley & Loeffler, 1976 | |-- †Athenaegis chattertoni Soehn & Wilson, 1990 | `--o †Tolypelepis Pander, 1856 [Tolypaspis] | |-- †T. undulata Pander, 1856 [Oniscolepis magnus] | |-- †T. lenzi Dineley & Loeffler, 1976 | `-- †T. leopoldensis Loeffler & Jones, 1977 `--+-- †Cynthaspidiformes `-- †Pteraspidiformes Berg, 1940
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–W. H. Freeman and company, New York, 1988, 698 - Carroll, R. L., 1988: Appendix. 594-648
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