Opinions from D. E. G. Briggs et al. 2008
- 'Alalcomenaeus belongs to Arachnomorpha'
- 'Alokistocaridae belongs to Ptychopariina'
- 'Anomalocarididae belongs to Radiodonta'
- 'Anomalocaris belongs to Anomalocarididae'
- 'Anomalocaris saron belongs to Anomalocaris' according to X.-G. Hou et al. 1995
- 'Anomalocaris saron belongs to Anomalocaris'
- 'Arachnomorpha belongs to Euarthropoda'
- 'Branchiocaris belongs to Protocaridida'
- 'Branchiocaris yunnanensis belongs to Branchiocaris' according to Hou 1987
- 'Branchiocaris yunnanensis belongs to Branchiocaris'
- 'Canadaspidida belongs to Crustacea'
- 'Canadaspididae belongs to Canadaspidida'
- 'Canadaspis belongs to Canadaspididae'
- 'Cucumericus belongs to Anomalocarididae'
- 'Cucumericus decoratus belongs to Cucumericus'
- 'Dicranocaris belongs to Arachnomorpha'
- 'Dicranocaris guntherorum belongs to Dicranocaris'
- 'Dinocarida belongs to Euarthropoda'
- 'Elrathia belongs to Alokistocaridae'
- 'Emeraldella belongs to Arachnomorpha'
- 'Hymenocaris perfecta belongs to Hymenocaris' according to Walcott 1912
- 'Hymenocaris perfecta is recombined as Canadaspis perfecta'
- 'Isoxys belongs to Arthropoda'
- 'Leanchoilia belongs to Arachnomorpha'
- 'Leanchoilia hanceyi belongs to Leanchoilia' according to Briggs and Robison 1984
- 'Leanchoilia hanceyi belongs to Leanchoilia'
- 'Leanchoilia protogonia belongs to Leanchoilia' according to Simonetta 1970
- 'Leanchoilia protogonia belongs to Leanchoilia'
- 'Leanchoilia superlata belongs to Leanchoilia' according to Walcott 1912
- 'Leanchoilia superlata belongs to Leanchoilia'
- 'Mollisonia belongs to Arachnomorpha'
- 'Mollisonia gracilis belongs to Mollisonia' according to Walcott 1912
- 'Mollisonia gracilis belongs to Mollisonia'
- 'Mollisonia rara belongs to Mollisonia' according to Walcott 1912
- 'Mollisonia rara is a subjective synonym of Mollisonia symmetrica'
- 'Mollisonia symmetrica belongs to Mollisonia' according to Walcott 1912
- 'Mollisonia symmetrica belongs to Mollisonia'
- 'Nettapezoura belongs to Arachnomorpha'
- 'Nettapezoura basilika belongs to Nettapezoura'
- 'Parapeytoia belongs to Anomalocarididae'
- 'Parapeytoia yunnanensis belongs to Parapeytoia'
- 'Protocaridida belongs to Crustacea'
- 'Ptychopariida belongs to Trilobita'
- 'Ptychopariina belongs to Ptychopariida'
- 'Radiodonta belongs to Dinocarida'
- 'Sanctacaris belongs to Arachnomorpha'
- 'Sidneyia belongs to Arachnomorpha'
- 'Sidneyia sinica belongs to Sidneyia' according to Zhang and Shu 2002
- 'Trilobita belongs to Euarthropoda'
- 'Waptia belongs to Waptiidae'
- 'Waptia fieldensis belongs to Waptia' according to Walcott 1912
- 'Waptia fieldensis belongs to Waptia'
- 'Waptiida belongs to Crustacea'
- 'Waptiidae belongs to Waptiida'