Opinions from C. I. Alexander 1934
- 'Argilloecia belongs to Cypridae'
- 'Argilloecia faba belongs to Argilloecia'
- 'Argilloecia subcylindrica belongs to Argilloecia'
- 'Bairdia belongs to Bairdidae'
- 'Bairdia suborbiculata belongs to Bairdia'
- 'Brachycythere belongs to Cytheridae'
- 'Brachycythere foraminosa belongs to Brachycythere'
- 'Brachycythere formosa belongs to Brachycythere'
- 'Brachycythere interrasilis belongs to Brachycythere'
- 'Brachycythere plena belongs to Brachycythere'
- 'Cythereis belongs to Cytheridae'
- 'Cythereis (Pterygocythereis) lemnicata belongs to Cythereis (Pterygocythereis)'
- 'Cythereis cancellosa belongs to Cythereis'
- 'Cythereis midwayensis belongs to Cythereis'
- 'Cythereis prestwichiana belongs to Cythereis' according to Jones and Sherborn 1887
- 'Cythereis sculptilis belongs to Cythereis'
- 'Cythereis spiniferrima belongs to Cythereis' according to Jones and Sherborn 1889
- 'Cytherella belongs to Cytherellidae'
- 'Cytherella excavata belongs to Cytherella'
- 'Cytherella symmetrica belongs to Cytherella'
- 'Cytherella tumidosa belongs to Cytherella'
- 'Cytherella turgidula belongs to Cytherella'
- 'Cytheridea belongs to Cytheridae'
- 'Cytheridea fornicata belongs to Cytheridea'
- 'Cytheridea multipunctata belongs to Cytheridea'
- 'Cytheridea ruginosa belongs to Cytheridea'
- 'Cytheridea ruida belongs to Cytheridea'
- 'Cytheromorpha belongs to Cytheridae'
- 'Cytheromorpha scrobiculata belongs to Cytheromorpha'
- 'Cytheropteron belongs to Cytheridae'
- 'Cytheropteron (Cytheropteron) aligerum belongs to Cytheropteron (Cytheropteron)'
- 'Cytheropteron (Cytheropteron) midwayensis belongs to Cytheropteron (Cytheropteron)'
- 'Eucythere belongs to Cytheridae'
- 'Eucythere midwayensis belongs to Eucythere'
- 'Krithe belongs to Cytheridae'
- 'Krithe perattica belongs to Krithe'
- 'Loxoconcha belongs to Cytheridae'
- 'Loxoconcha corrugata belongs to Loxoconcha'
- 'Loxoconcha nuda belongs to Loxoconcha'
- 'Loxoconcha perdecora belongs to Loxoconcha'
- 'Loxoconcha prava belongs to Loxoconcha'
- 'Monoceratina belongs to Cytheridae'
- 'Monoceratina rossae belongs to Monoceratina'
- 'Monoceratina speciosa belongs to Monoceratina'
- 'Paracypris belongs to Cypridae'
- 'Paracypris perapiculata belongs to Paracypris'
- 'Xestoleberis belongs to Cytheridae'
- 'Xestoleberis truncata belongs to Xestoleberis'