Ptychoparioidea

Ptychoparioidea Temporal range: Cambrian Stage 3–Late Ordovician PreꞒ Ꞓ O S D C P T J K Pg N
Elrathia kingii (family Alokistocaridae) from the Wheeler Shale (Middle Cambrian), Utah.
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Clade:	† Artiopoda
Class:	† Trilobita
Order:	† Ptychopariida
Suborder:	† Ptychopariina
Superfamily:	† Ptychoparioidea Pour and Popov, 2008
Families
See text

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 Lisaniidae
• 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

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