Opinions from A. B. Smith and C.R.C. Paul 1982
- 'Actinodiscus belongs to Cyclocystoididae'
- 'Apycnodiscus belongs to Cyclocystoididae'
- 'Cyclocystoidea belongs to Echinodermata'
- 'Cyclocystoides belongs to Cyclocystoididae'
- 'Cyclocystoides anteceptus belongs to Cyclocystoides' according to J. Hall 1872
- 'Cyclocystoides anteceptus is a subjective synonym of Apycnodiscus salteri'
- 'Cyclocystoides bellulus belongs to Cyclocystoides' according to S.A. Miller and C.B. Dyer 1878
- 'Cyclocystoides bellulus is a subjective synonym of Zygocycloides magnus'
- 'Cyclocystoides billingsi belongs to Cyclocystoides' according to A.E. Wilson 1946
- 'Cyclocystoides billingsi is recombined as Polytryphocycloides billingsi'
- 'Cyclocystoides caractaci belongs to Cyclocystoides' according to R. Etheridge 1939
- 'Cyclocystoides caractaci is a subjective synonym of Zygocycloides marstoni'
- 'Cyclocystoides cincinnatiensis belongs to Cyclocystoides' according to S.A. Miller and C.L. Faber 1892
- 'Cyclocystoides cincinnatiensis is recombined as Narrawayella cincinnatiensis' according to A.F. Foerste 1920
- 'Cyclocystoides davisii belongs to Cyclocystoides' according to J.W. Salter 1858
- 'Cyclocystoides davisii is recombined as Polytryphocycloides davisii'
- 'Cyclocystoides decussatum belongs to Cyclocystoides' according to J.L. Begg 1934
- 'Cyclocystoides decussatum is recombined as Apycnodiscus decussatum'
- 'Cyclocystoides depressus belongs to Cyclocystoides' according to E. Billings 1858
- 'Cyclocystoides depressus is recombined as Polytryphocycloides depressus'
- 'Cyclocystoides devonica belongs to Cyclocystoides' according to H. Sieverts-Doreck 1951
- 'Cyclocystoides devonica is recombined as Sievertsia devonica'
- 'Cyclocystoides gotus belongs to Cyclocystoides' according to R.J. Prokop 1980
- 'Cyclocystoides gotus is recombined as Sievertsia gotus'
- 'Cyclocystoides huronensis belongs to Cyclocystoides' according to E. Billings 1865
- 'Cyclocystoides huronensis is recombined as Polytryphocycloides huronensis'
- 'Cyclocystoides insularis belongs to Cyclocystoides' according to G. Regnell 1945
- 'Cyclocystoides insularis is recombined as Apycnodiscus insularis'
- 'Cyclocystoides latus belongs to Cyclocystoides'
- 'Cyclocystoides lindstroemi belongs to Cyclocystoides' according to G. Regnell 1945
- 'Cyclocystoides lindstroemi is recombined as Polytryphocycloides lindstroemi'
- 'Cyclocystoides magnus belongs to Cyclocystoides' according to S.A. Miller and C.B. Dyer 1878
- 'Cyclocystoides magnus is recombined as Zygocycloides magnus'
- 'Cyclocystoides marstoni belongs to Cyclocystoides' according to J.W. Salter 1865
- 'Cyclocystoides marstoni is recombined as Zygocycloides marstoni'
- 'Cyclocystoides minus belongs to Cyclocystoides' according to S.A. Miller and C.B. Dyer 1878
- 'Cyclocystoides minus is a subjective synonym of Zygocycloides magnus'
- 'Cyclocystoides nitidus belongs to Cyclocystoides' according to C.L. Faber 1886
- 'Cyclocystoides nitidus is recombined as Diastocycloides nitidus'
- 'Cyclocystoides salteri belongs to Cyclocystoides' according to J. Hall 1866
- 'Cyclocystoides salteri is recombined as Apycnodiscus salteri'
- 'Cyclocystoides scammaphoris belongs to Cyclocystoides'
- 'Cyclocystoides tartas belongs to Cyclocystoides' according to R.J. Prokop 1980
- 'Cyclocystoides tartas is recombined as Sievertsia tartas'
- 'Cyclocystoides tholicos belongs to Cyclocystoides'
- 'Cyclocystoides wrighti belongs to Cyclocystoides' according to Begg 1939
- 'Cyclocystoides wrighti is recombined as Actinodiscus wrighti'
- 'Cyclocystoididae belongs to Cyclocystoidea'
- 'Diastocycloides belongs to Cyclocystoididae'
- 'Diastocycloides stauromorphus belongs to Diastocycloides'
- 'Narrawayella belongs to Cyclocystoididae'
- 'Narrawayella raymondi belongs to Narrawayella' according to A.F. Foerste 1920
- 'Narrawayella raymondi is recombined as Cyclocystoides raymondi' according to R.V. Kesling 1966
- 'Polytryphocycloides belongs to Cyclocystoididae'
- 'Polytryphocycloides grandis belongs to Polytryphocycloides'
- 'Sievertsia belongs to Cyclocystoididae'
- 'Sievertsia concava belongs to Sievertsia'
- 'Zygocycloides belongs to Cyclocystoididae'
- 'Zygocycloides variabilis belongs to Zygocycloides'