| Ptychoparioidea Temporal range:
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|---|---|
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| Elrathia kingii (family Alokistocaridae) from the Wheeler Shale (Middle Cambrian), Utah. | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | †Trilobita |
| Order: | †Ptychopariida |
| Superfamily: | †Ptychoparioidea Pour and Popov, 2008 |
| Families | |
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See text | |
Ptychoparioidea is a superfamily of the Ptychopariida order of trilobites.[1][2][3][4]
- ^ 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
- ^ 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
- ^ 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
- ^ Pour M. G., Popov L. E. (2009) Silicified Middle Cambrian trilobites from Kyrgyzstan, Palaeontology, 1039-1056