Opinions from R. N. Nelson 1925
- 'Acteon simiensis belongs to Acteon'
- 'Acteon susanaensis belongs to Acteon'
- 'Acteon venturaensis belongs to Acteon'
- 'Adeorbis woodfordi belongs to Adeorbis'
- 'Amauropsis martinezensis belongs to Amauropsis'
- 'Ancilla burroensis belongs to Ancilla'
- 'Architectonica simiensis belongs to Architectonica'
- 'Brachysphingus gibbosus belongs to Brachysphingus'
- 'Callocardia simiensis belongs to Callocardia'
- 'Callocardia sinedepressa belongs to Callocardia'
- 'Cardium linteum belongs to Cardium'
- 'Chrysodomus burroensis belongs to Chrysodomus'
- 'Cinulia pinguis is recombined as Tornatellaea pinguis'
- 'Corbula franklini belongs to Corbula'
- 'Crassatellites branneri belongs to Crassatellites'
- 'Cryptochorda (Lyrianella) belongs to Cryptochorda'
- 'Cryptochorda (Lyrianella) lyrata belongs to Cryptochorda (Lyrianella)'
- 'Cucullaea morani is recombined as Nemodon morani'
- 'Diplodonta traski belongs to Diplodonta'
- 'Fusinus (Levifusus) calabasasensis belongs to Fusinus (Levifusus)'
- 'Fusinus (Levifusus) waringi belongs to Fusinus (Levifusus)'
- 'Fusinus simiensis belongs to Fusinus'
- 'Heteroterma trochoidea is recombined as Tudicula trochoidea' according to Cossmann 1901
- 'Heteroterma trochoidea belongs to Heteroterma'
- 'Leda fabata belongs to Leda'
- 'Levifusus was reranked as Fusinus (Levifusus) and belongs to Fusinus'
- 'Lima clarki belongs to Lima'
- 'Lyria hannibali belongs to Lyria'
- 'Macrocallista caryi belongs to Macrocallista'
- 'Macrocallista furlongi belongs to Macrocallista'
- 'Macrocallista stantoni belongs to Macrocallista'
- 'Metacerithium packardi belongs to Metacerithium'
- 'Modiolus altiobliquus belongs to Modiolus'
- 'Modiolus lawsoni belongs to Modiolus'
- 'Nuculana gabbii is recombined as Leda gabbi'
- 'Polinices (Euspira) simiensis belongs to Polinices (Euspira)'
- 'Polinices susanaensis belongs to Polinices'
- 'Pteria howei belongs to Pteria'
- 'Semifusus dickersoni belongs to Semifusus'
- 'Septifer susanaensis belongs to Septifer'
- 'Solariella minorstriata belongs to Solariella'
- 'Solariella transennata belongs to Solariella'
- 'Sycum stillum belongs to Sycum'
- 'Tellina crooki belongs to Tellina'
- 'Tellina simiensis belongs to Tellina'
- 'Tellina undulifera belongs to Tellina'
- 'Turbinella crassitesta is recombined as Retipirula crassitesta'
- 'Turricula calafia belongs to Turricula'
- 'Turricula waringi belongs to Turricula'
- 'Turris burroensis belongs to Turris'
- 'Turritella hannai belongs to Turritella'
- 'Turritella subuvasana belongs to Turritella'
- 'Turritella susanaensis belongs to Turritella'
- 'Volutilithes calabasasensis belongs to Volutilithes'
- 'Xenophora simiensis belongs to Xenophora'