Classification of Pates et al. 2021

Cl. Scyphozoa Goette 1887 [jellyfish]
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Or. Semaeostomeae Agassiz 1862
Cl. Hydrozoa Owen 1843
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Invalid names: Narcomedusae Haeckel 1879 [empty]
Ph. Arthropoda Latreille 1829 [arthropod]
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G. †Meristosoma Robison and Wiley 1995
Cl. Pterobranchia Lankester 1877 [pterobranch]
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G. †Mastograptus LoDuca and Kramer 2014
Ph. Chlorophyta Reichenbach 1834 [green algae]
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G. †Fuxianospira Chen and Zhao 1997
G. †Sinocylindra Chen and Erdtmann 1991
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Or. †Radiodonta Collins 1996
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G. †Caryosyntrips Daley and Budd 2010
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†Caryosyntrips serratus Daley and Budd 2010
Fm. †Hurdiidae Vinther et al. 2014
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G. †Aegirocassis Van Roy et al. 2015
G. †Buccaspinea Pates et al. 2021
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†Buccaspinea cooperi Pates et al. 2021
G. †Cambroraster Moysiuk and Caron 2019
G. †Cordaticaris Sun et al. 2020
G. †Hurdia Walcott 1912
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Invalid names: Proboscicaris Rolfe 1962 [synonym]
G. †Pahvantia
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†Pahvantia hastata Robison and Richards 1981
G. †Peytoia Walcott 1911
G. †Schinderhannes Kühl et al. 2009
G. †Stanleycaris Caron et al. 2010
G. †Ursulinacaris Pates et al. 2019
G. †Zhenghecaris Vannier et al. 2006