After Whittington, Chang, Dean, Fortey, Jell, Laurie, Palmer, Repina, Rushton & Shergold, 1997 (only typespecies listed)
<==o †Agnostinae M'Coy, 1849 |--o †Agnostus Brongniart, 1822 [Entomostracites] M. Camb. U. Camb. NEu. | |--o †(Agnostus) Brongniart, 1822 [Battus Dalman, 1827] | | `-- †A. (A.) pisiformis (Wahlenberg, 1818) [Entomostracites pisiformis Wahlenberg, 1818] | `--o †(Homagnostus) Howell, 1935 | `-- †A. (H.) obesus (Belt, 1867) [Agnostus pisiformis Linnaeus var. obesus Belt, 1867] |--o †Acutatagnostus Ergaliev, 1980; U. Camb. CAs. | `-- †A. acutatus Ergaliev, 1980 |?-o ?†Gymnagnostus Robinson & Pantoja-Alor, 1968; U. Camb. SWNA. | `-- †G. gongros Robinson & Pantoja-Alor, 1968 |--o †Innitagnostus Öpik, 1967; U. Camb. CAs. SEAs. Aust. WNA. ENA. | `-- †I. innitens Öpik, 1967 |?-o ?†Ivshinagnostus Ergaliev, 1980; U. Camb. CAs. | `-- †I. ivshini Ergaliev, 1980 |--o †Lotagnostus Whitehouse, 1936; U. Camb. NEu. NA. EAs. CAs. Aust. | |--o †(Lotagnostus) Whitehouse, 1936 | | `-- †L. (L.) trisectus (Salter, 1864) sensu Westergård, 1922 [Agnostus trisectus Salter, 1864] | |--o †(Eolotagnostus) Zhou in Zhou, Li & Qu, 1982 | | `-- †L. (E.) gansuensis Zhou, Li & Qu, 1982 | `--o †(Distagnostus) Shergold, 1972 | `-- †L. (D.) ergodes Shergold, 1972 |--o †Micragnostus Howell, 1935; U. Camb. NEu. Spits. WEu. SA. L. Ord. NEu. WEu. | `-- †M. calvus (Lake, 1906) [Agnostus calvus Lake, 1906] |--o †Oncagnostus Whitehouse, 1936; U. Camb. Eu. As. Aust. Ant. NA. L. Ord. Aust. SA. NA. EAs. | |--o †(Oncagnostus) Whitehouse, 1936 [Eurudagnostus Lermontova, 1951] | | |-- †O. (O.) hoi (Y. Sun, 1924) [Agnostus hoi Y. Sun, 1924] | | |-- †O. (O.) grandis (Lermontova, 1951) [Eurudagnostus grandis Lermontova, 1951] | | `-- †O. (O.) tumidosus (Hall & Whitefield) | |--o †(Kymagnostus) Hohensee in Hohensee & Stitt, 1989 | | `-- †O. (K.) harti (Hohensee & Stitt, 1989) | `--o †(Strictagnostus) Shergold, 1975 | `-- †O. (S.) chronius (Shergold, 1975) [Geragnostus (Strictagnostus) chronius Shergold, 1975] `--o †Trilobagnostus [Rudagnostus Lermontova, 1951] Harrington, 1938; U. Camb. Eu. L. Ord. Eu. As. Aust. SA. NA. |-- †T. innocens (Clark, 1923) [Agnostus innocens Clark, 1923] `--o †T. princeps `-- †T. princeps var. rudis (Salter, 1864) [Rudagnostus princeps var. rudis (Salter, 1864) Lermontova, 1951; Agnostus princeps var. rudis Salter, 1864]
Reference(s):
- Whittington, H. B., Chang, W. T., Dean, W. T., Fortey, R. A., Jell, P. A., Laurie, J. R., Palmer, A. R., Repina, L. N., Rushton, A. W. A. & Shergold, J. H., 1997: Systematic Description of the class Trilobita. 331-481.
in Kaesler, R. L., (eds.) 1997: Treatise on Invertebrate Paleontology, Part O, Arthropoda 1, Trilobita, Revisited, vol 1: Introduction, Order Agnostida; Order Redlichiida.
–The Geological Society of America, Inc. and The University of Kansas, Boulder, Colorado & Lawrence, Kansas, 1997, xxiv-530