After Whittington, Chang, Dean, Fortey, Jell, Laurie, Palmer, Repina, Rushton & Shergold, 1997 (only typespecies listed)
<==o †Ammaghostinae Öpik, 1967 |--o †Ammagnostus Öpik, 1967; U. Camb. NA. Aust. As. NA. Ant. | |--o †(Ammagnostus) Öpik, 1967 [Glyptagnostus (Lispagnostus) Öpik, 1967; Agnostaglossa Öpik, 1967] | | |-- †A. (A.) psammius Öpik, 1967 | | |-- †A. (A.) lenis (Öpik, 1967) [Glyptagnostus (Lispagnostus) lenis Öpik, 1967] | | `-- †A. (A.) bassa (Öpik, 1967) [Agnostaglossa bassa Öpik, 1967] | `--o †(Tentagnostus) X. Sun, 1989 [Pseudagnostus] | `-- †A. (T.) adchinensis (Schrank, 1975) |--o †Formosagnostus Ergaliev, 1980 [Kunshanagnostus Qian & Zhou, 1984]; U. Camb. CAs. EAs. Ant. Aust. | |-- †F. formosus Ergaliev, 1980 | `-- †F. kunshanensis ( Qian & Zhou, 1984) [Kunshanagnostus kunshanensis Qian & Zhou, 1984] |--o †Hadragnostus Öpik, 1967; U. Camb. Aust. WNA. | `-- †H. las Öpik, 1967 |--o ?†Kormagnostella E. Romanenko in Romanenko & Romanenko, 1967 [Litagnostoides Schrank, 1975]; U. Camb. CAs. EAs. Aust. | |-- †K. glabrata E. Romanenko in Romanenko & Romanenko, 1967 | `-- †K. minutus ( Schrank, 1975) [Litagnostoides minutus Schrank, 1975] |--o †Kormagnostus Resser, 1938; M. U. Camb. NA. SA. Aust. EAs. CA. | |-- †K. simplex Resser, 1938 | `-- †K. seclusus (Walcott, 1884b) `--o †Proagnostus Butts, 1926 [Agnostacus Öpik, 1967; Agnostacus (Paragnostacus) Peng, 1992] |-- †P. bulbus Butts, 1926; M. U. Camb. NA. SA. Aust. EAs. CA. |-- †P. sinensis (Peng, 1992) [Agnostacus (Paragnostacus) sinensis Peng, 1992)] `-- †P. orientalis [Agnostacus orientalis]
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