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Arthropoda (see below for synonymy)
| i. s.: Dictyocaris Salter 1860
| Urokodia Hou, Chen & Lu 1989
| Tontoia Walcott 1912
| Retifacies Hou, Chen & Lu 1989
| Rhombicalvaria Hou 1987
| Helmetia Walcott 1917
| Corcorania Jell 1980
| Serracaris Briggs 1978
| `--S. lineata [=Anomalocaris lineata]
| Cambropodus gracilis
| Protocaris Walcott 1884
| Achanarraspis Anderson et al. 2000
| Arthrogyrinus Wilson & Almond 2001
| `--*A. platyurus Wilson & Almond 2001
|--Sidneyia Walcott 1911 [Limulavida, Sidneyidea]
| `--S. inexpectans
`--+--
`--+--Yohoiidea [Protochelicerata, Yohoiidacea]
| |--Jiangfengia Hou 1987 [Jianfengiida]
| `--Yohoia Walcott 1912 [Yohoiida]
| `--Y. tenuis
`--+--Sanctacaris Briggs & Collins 1988 [Sanctacarida, Sanctacaridea]
| |--‘Utahcaris’ orion Conway Morris & Robison 1988
| `--Sanctacaris uncata Briggs & Collins 1988
`--+--+--Fortiforceps
| `--+--Occacaris
| `--+--Clypecaris
| `--+--+--Pectocaris
| | `--Fuxianhuiida [Fuxianhuiata]
| | |--Fuxianhuia protensa Hou 1987
| | `--Changjiangocaris longiformis Hou & Bergström 1991
| `--Canadaspidida
| | i. s.: Rehbachiella kinnekullensis Müller 1983
| |--Perspicaris Briggs 1977
| `--+--Canadaspis Novoshilov 1960
| | `--C. perfecta (Walcott 1912)
| `--Brachiocaridea
| |--Odaraia Walcott 1912 [Odaraiata, Odaraiida]
| | `--O. alata
| `--Branchiocaris Briggs 1976 (see below for synonymy)
| `--B. pretiosa (Resser 1929) [=Protocaris pretiosa]
`--Euarthropoda [Emeraldellacea]
|--
`--+--Emeraldella Walcott 1912 [Emeraldellida]
`--+--Cambropachycope
`--Mandibulata [Antennata, Atelocerata, Biantennata, Tracheata]
| i. s.: Euthycarcinoidea [Archicopepoda, Euthycarcinata]
| | i. s.: Synaustrus brookvalensis (Riek 1964)
| | Schramixerxes gerem (Schram & Rolfe 1982)
| | Kalbarria brimmellae
| |--Sottixeriformes
| | |--Pieckoxerxes piekoae (Schram & Rolfe 1982)
| | `--Sottyxerxes multiplex Schram & Rolfe 1982
| `--Euthycarciniformes
| | i. s.: Euthycarcinus
| | |--E. ibbenburensis
| | `--E. kessleri Handlirsch 1914
| `--Kottixerxidae
| |--Kottixerxes Schram 1971
| | |--*K. gloriosus Schram 1971
| | `--K. anglicus Wilson & Almond 2001
| `--Smithixerxes Schram & Rolfe 1982
| |--*S. juliarum Schram & Rolfe 1982
| `--S. pustulosus Wilson & Almond 2001
| Marrellomorpha
| |--Vachonisia Lehmann 1955 (see below for synonymy)
| `--Marrellidea
| |--Mimetaster Gurich 1931 (see below for synonymy)
| `--Marrella Walcott 1912 [Marrellata, Marrellida]
| `--M. splendens
|--
`--Pancrustacea [Tetraconata]
|--
`--
Arthropoda [Burgessidea, Canadaspididea, Cheliceromorpha, Emeraldellidea, Euthycarcinomorpha, Merostomoidea, Schizoramia, Trilobitoidea, Trilobitomorpha]
Branchiocaris Briggs 1976 [Branchiocarata, Branchiocarida]
Mimetaster Gurich 1931 [Mimetasterata, Mimetasterida]
Vachonisia Lehmann 1955 [Vachonisiata, Vachonisiida]
* Type species of genus indicated
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Bousfield, E. L. 1995. A contribution to the natural classification of Lower and Middle Cambrian arthropods: Food-gathering and feeding mechanisms. Amphipacifica 2: 3-34.
Briggs, D. E. G., B. S. Lieberman, S. L. Halgedahl & R. D. Jarrard. 2005. A new metazoan from the Middle Cambrian of Utah and the nature of the Vetulicolia. Palaeontology 48 (4): 681-686.
Budd, G. E. 2002. A palaeontological solution to the arthropod head problem. Nature 417: 271-275.
Conway Morris, S. 1998. The Crucible of Creation. Oxford University Press: Oxford.
Giribet, G., G. D. Edgecombe & W. C. Wheeler. 2001. Arthropod phylogeny based on eight molecular loci and morphology. Nature 413: 157-161.
Gould, S. J. 1989. Wonderful Life. Vintage: London.
Lange, S., & F. R. Schram. 2002. Possible lattice organs in Cretaceous Thylacocephala. Contributions to Zoology 71 (4): 159-169.
Newman, M. J. 2002. A new naked jawless vertebrate from the Middle Devonian of Scotland. Palaeontology 45 (5): 933-941.
Rode, A. L., & B. S. Lieberman. 2002. Phylogenetic and biogeographic analysis of Devonian phyllocarid crustaceans. Journal of Paleontology 76 (2): 271-286.
Waloszek, D., & J. A. Dunlop. 2002. A larval sea spider (Arthropoda: Pycnogonida) from the Upper Cambrian ‘Orsten’ of Sweden, and the phylogenetic position of pycnogonids. Palaeontology 45 (3): 421-446.
Whittington, H. B., & D. E. G. Briggs. 1985. The largest Cambrian animal, Anomalocaris, Burgess Shale, British Columbia. Philosophical Transactions of the Royal Society of London 309: 569-609.
Wilson, H. M., & J. E. Almond. 2001. New euthycarcinoids and an enigmatic arthropod from the British coal measures. Palaeontology 44 (1): 143-156.
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