After Whittington, Chang, Dean, Fortey, Jell, Laurie, Palmer, Repina, Rushton & Shergold, 1997
<==o †Metagnostidae Jaekel, 1909 [Arthrorhachidae Reymond, 1913a; Geragnostidae Howell, 1935b; Trinodidae Howell, 1935b] |--o †Arthrorhachis Hawle & Corda, 1847 [Metagnostus Jaekel, 1909; Girvanagnostus Kobayashi, 1939a] | |-- †A. tardus (Barrande, 1846) [Battus tardus Barrande, 1846] | |-- †A. erraticus (Jaekel, 1909) [Metagnostus erraticus Jaekel, 1909] | `-- †A. girvanensis (Reed, 1903) [Agnostus girvanensis Reed, 1903; Girvanagnostus girvanensis (Reed, 1903) Kobayashi, 1939a] |--o †Anglagnostus Howell, 1935b | `-- †A. dux (Callaway, 1877) [Agnostus dux Callaway, 1877] |--o †Chatkalagnostus Hajrullina & Abdullaev, in Abdullaev & Khaletskaya, 1970 [Oculagnostus Ahlberg, 1988] | |-- †C. mirus Hajrullina & Abdullaev, in Abdullaev & Khaletskaya, 1970 | `-- †C. frici (Holub, 1908) [Agnostus frici Holub, 1908; Oculagnostus frici (Holub) Ahlberg, 1988] |--o †Corrugatagnostus Kobayashi, 1939a [Segmentagnostus Pek, 1977; Granulatagnostus Kolobova, 1981] | |-- †C. morea (Salter, 1864b) [Agnostus morea Salter, 1864b; Agnostus perrugatus Barrande, 1872] | |-- †C. caducus (Barrande, 1872) [Agnostus caducus Barrande, 1872; Segmentagnostus caducus (Barrande) Pek, 1977] | `-- †C. granulatus (Kolobova, 1981) [Granulatagnostus granulatus Kolobova, 1981] |--o †Dividuagnostus Koroleva, 1982 [Peziziopsis Ju in Qui et al., 1983] | |-- †D. minus Koroleva, 1982 | |-- †D. typica (Ju in Qui et al., 1983) [Peziziopsis typica Ju in Qui et al., 1983] | `-- †D. mccoyi (Salter) |--o †Galbagnostus Whittington, 1965 | `-- †G. galba (Billings, 1865) [Agnostus galba Billings, 1865] |--o †Geragnostella Kobayashi, 1939a | `-- †G. tullbergi (Novák, 1883) [Agnostus tullbergi Novák, 1883] |--o †Geragnostus Howell, 1935b [Geratrinodus Kabayashi & Hamada, 1978; Neptunagnostella Pek, 1977] | |-- †G. sidenbladhi (Linnarsson, 1869) [Agnostus sidenbladhi Linnarsson, 1869] | |-- †G. perconvexus (Kabayashi & Hamada, 1978) [Geratrinodus perconvexus Kabayashi & Hamada, 1978] | `-- †G. consors (Holub, 1912) [Agnostus consors Holub, 1912; Neptunagnostella consors (Holub) Pek, 1977] |-- †Granuloagnostus dusli (Novák, 1883) Pek, 1970 [Agnostus dusli Novák, 1883] |--o †Homagnostoides Kobayashi, 1939a | `-- †H. ferralsensis (Munier-Chalmas & Bergeron, in Bergeron, 1889) [Agnostus ferralsensis Munier-Chalmas & Bergeron, in Bergeron, 1889] `--o †Trinodus M'Coy, 1846 `-- †T. agnostiformis M'Coy, 1846
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