Cyclopygoidea

Cyclopygoidea Temporal range: Furongian–Ordovician PreꞒ Ꞓ O S D C P T J K Pg N
Pricyclopyge binodosa
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	† Trilobita
Order:	† Asaphida
Superfamily:	† Cyclopygoidea

Cyclopygoidea is a superfamily of trilobites in the order Asaphida, containing the families Cyclopygidae, Nileidae, Symphysurinidae, and Taihungshaniidae. ^[1] Some subgroups such as the Cyclopygidae are thought to have lived in the water column in the deep sea, where as telephinids such as Carolinites inhabited epipelagic depths. ^[2] Some members of the family Nileidae were moved outside of it. ^[3] The first cyclopygoids were of the family Simphysurinidae such as Symphysurina in Furongian (late Cambrian) North America. ^[4]

References

1. "PBDB Taxon". paleobiodb.org. Retrieved 2024-12-24.
2. McCormick, Tim; Fortey, Richard A. (April 1998). "Independent testing of a paleobiological hypothesis: the optical design of two Ordovician pelagic trilobites reveals their relative paleobathymetry" . Paleobiology. 24 (2): 235–253. doi:10.1666/0094-8373(1998)024[0235:ITOAPH]2.3.CO;2. ISSN   0094-8373.
3. Whittington, H. B. (2003). "The trilobite family Nileidae: morphology and classification". Palaeontology. 46 (4): 635–646. Bibcode:2003Palgy..46..635W. doi:10.1111/1475-4983.00313. ISSN   1475-4983.
4. Loch, J.; Taylor, John F. (2012). "New symphysurinid trilobites from the Cambrian-Ordovician boundary interval in the western United States". Memoirs of the Association of Australasian Palaeontologists. S2CID   53954813.

Further reading

• Ingham, J. Keith; Fortey, Richard A. (December 2022). "Review of the Ordovician pelagic trilobite Ellipsotaphrus (Cyclopygoidea, Ellipsotaphridae) and its allies, with new discoveries from Girvan, Ayrshire" . Earth and Environmental Science Transactions of the Royal Society of Edinburgh. 113 (4): 313–336. doi:10.1017/S1755691022000263. ISSN   1755-6910.
• Park, Tae-Yoon S.; Kihm, Ji-Hoon; Woo, Jusun; Kim, Young-Hwan G.; Lee, Jong-Ik (2016). "Ontogeny of the Furongian (late Cambrian) trilobite roceratopyge cf. . ata Whitehouse from northern Victoria Land, Antarctica, and the evolution of metamorphosis in trilobites". Palaeontology. 59 (5): 657–670. doi:10.1111/pala.12251. ISSN   1475-4983.
• Paterson, John R. (January 2020). "The trouble with trilobites: classification, phylogeny and the cryptogenesis problem" . Geological Magazine. 157 (1): 35–46. doi:10.1017/S0016756819000426. ISSN   0016-7568.
• Laibl, Lukáš; Servais, Thomas; Mottequin, Bernard (2023-12-01). "Tremadocian (Ordovician) trilobites from the Brabant Massif (Belgium): Palaeogeographical and palaeoecological implications" . Geobios. Ordovician of the World — Proceedings of the UNESCO/IGCP Project 653 absolutely final & Project 735 opening online meeting (13th-16th, September 2021). 81: 7–16. doi:10.1016/j.geobios.2023.04.003. ISSN   0016-6995.