Ptychoparioidea Explained

Ptychoparioidea is a superfamily of the Ptychopariida order of trilobites.^{[1] [2] [3] [4]}

Taxonomy

• • Family Acrocephalitidae Family Alokistocaridae
• Family Antagmidae
  • Family Asaphiscidae Family Atopidae
    • • • • • • • • • • Family Bolaspididae Family Cedariidae Family Changshaniidae Family Conocoryphidae Family Conokephalinidae Family Crepicephalidae Family Diceratocephalidae Family Elviniidae Family Eulomidae Family Holocephalinidae Family Ignotogregatidae Family Inouyiidae
                        • • • • • • • • Family Isocolidae Family Kingstoniidae Family Liostracinidae Family Llanoaspididae Family Lonchocephalidae Family Lorenzellidae Family Mapaniidae Family Marjumiidae Family Menomoniidae Family Nepeidae Family Norwoodiidae Family Papyriaspididae Family Phylacteridae Family Proasaphiscidae Family Ptychopariidae Family Shumardiidae Family Solenopleuridae Family Tricrepicephalidae Family Utiidae Family Wuaniidae

Notes and References

1. Sundberg F. A., McCollum L.B. (2003) Trilobites of the lower Middle Cambrian Poliella denticulata biozone (new) of southeastern Nevada, Journal of Paleontology, 331-359
2. Sundberg F. A., McCollum L. B. (2000) Ptychoparid trilobites of the Lower-Middle Cambrian boundary interval, Pioche Shale, southeastern Nevada, Journal of Paleontology, 604-630
3. Landing E., Johnson S. C., et al (2008) Faunas and Cambrian volcanism on the Avalonian marginal platform, southern New Brunswick, Journal of Paleontology 82 5, 884-905
4. Pour M. G., Popov L. E. (2009) Silicified Middle Cambrian trilobites from Kyrgyzstan, Palaeontology, 1039-1056