After Whittington, Chang, Dean, Fortey, Jell, Laurie, Palmer, Repina, Rushton & Shergold, 1997
<==o †Weymouthiidae Kobayashi, 1943 emend. Jell, 1975a [ladadiscinae Soloviev, 1964] |--o †Weymouthia Raymond, 1913b | `-- †W. nobilis (Ford, 1872) [Agnostus nobilis Ford, 1872] |--o †Abakolia Bognibova in Tchernysheva, 1971 [Costadiscus Babcock, 1994a] | |-- †A. pauca Bognibova in Tchernysheva, 1971 | `-- †A. minutus (Babcock, 1994a) [Costadiscus minutus Babcock, 1994a] |--o †Acidiscus Rasetti, 1966a | `-- †A. birdi Rasetti, 1966a |--o †Acimetopus Rasetti, 1966a | `-- †A. bilobatus Rasetti, 1966a |--o †Analox Rasetti, 1966a | `-- †A. bipunctata Rasetti, 1966a |--o †Bathydiscus Rasetti, 1966a | `-- †B. dolichometopus Rasetti, 1966a |--o †Bolboparia Rasetti, 1966a | |-- †B. superba Rasetti, 1966a | `-- †B. elongata |--o †Cephalopyge Geyer, 1988 | `-- †C. notabilis Geyer, 1988 |--o †Cobboldites Kobayashi, 1943 | `-- †C. comleyensis (Cobbold, 1910) [Microdiscus comleyensis Cobbold, 1910] |--o †Jinghediscus Xiang & Zhang, 1985 [=? Mallagnostus Howell, 1935b] | `-- †J. nummularius Xiang & Zhang, 1985 |--o †Leptochilodiscus Rasetti, 1966a [Kerberodiscus Bassett, Owens & Rushton, 1976] | |-- †L. punctulatus Rasetti, 1966a | `-- †L. succinctus (Bassett, Owens & Rushton, 1976) [Kerberodiscus succinctus Bassett, Owens & Rushton, 1976] |--o †Litometopus Rasetti, 1966a [=? Cobboldites Kobayashi, 1943] | `-- †L. longispinus Rasetti, 1966a |--o †Mallagnostus Howell, 1935b [Ladadiscus Pokrovskaya, 1959] | |-- †M. desideratus (Walcott, 1890b) [Agnostus desiratus Walcott, 1890b] | |-- †M. limbatus (Pokrovskaya, 1959) [Ladadiscus limbatus Pokrovskaya, 1959] | `-- †M. llarenai |--o †Meniscuchus Öpik, 1975a | `-- †M. menetus Öpik, 1975a |--o †Ninadiscus Korobov, 1980 | `-- †N. strobulatus Korobov, 1980 |--o †Oodiscus Rasetti, 1966a | `-- †subgranulatus Rasetti, 1966a |--o †Runcinodiscus Rushton in Bassett, Owens & Rushton, 1976 | `-- †R. index Rushton in Bassett, Owens & Rushton, 1976 |--o †Semadiscus E.V. Romanenko in Repina & Romanenko, 1978 [=? Serrodiscus] | `-- †S. sollensis E.V. Romanenko in Repina & Romanenko, 1978 |--o †Serrodiscus Richter & Richter, 1941a [Paradiscus Kobayashi, 1943] | |-- †S. serratus Richter & Richter, 1941a [Eodiscus (Serrodiscus) serratus Richter & Richter, 1941a] | `-- †S. speciosus (Ford, 1873) [Microdiscus speciosus Ford, 1873; Paradiscus speciosus (Ford) Kobayashi, 1943] |--o †Stigmadiscus Rasetti, 1966a | `-- †S. stenometopus Rasetti, 1966a `--o †Tannodiscus Pokrovskaya, 1959 |-- †T. tannuolaicus Pokrovskaya, 1959 `-- †T. balanus Rushton, 1966
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: Indroduction, Order Agnostida; Order Redlichiida.
–The Geological Society of America, Inc. and The University of Kansas, Boulder, Colorado & Lawrence, Kansas, 1997, xxiv-530