Anomia fearensis Stephenson, 1923 † (original description)
Anomia fulleri Stephenson, 1923 † (original description)
Anomia lintea var. donohuensis Stephenson, 1923 † (original description)
Anomia olmstedi Stephenson, 1923 † (original description)
Cardium conradi Stephenson, 1923 † (original description)
Cardium donohuense Stephenson, 1923 † (original description)
Cardium penderense Stephenson, 1923 † (original description)
Cardium vaughani Stephenson, 1923 † (original description)
Corbula exigua Stephenson, 1923 † (original description)
Crenella mitchelli Stephenson, 1923 † (original description)
Cylichna carinata Stephenson, 1923 † (original description)
Cymbophora conradi Stephenson, 1923 † (original description)
Cymbophora trigonalis Stephenson, 1923 † (original description)
Cyprimeria gabbi Stephenson, 1923 † (original description)
Cyprimeria welleri Stephenson, 1923 † (original description)
Dentalium leve Stephenson, 1923 † (original description)
Dosiniopsis penderensis Stephenson, 1923 † (original description)
Fasciolaria kerri Gabb, 1877 † (basis of record)
Fasciolaria lyelli Stephenson, 1923 † (original description)
Fasciolaria obliquicostata Gabb, 1877 † (basis of record)
Fasciolaria rugosa Stephenson, 1923 † accepted as Pseudorapa (Stantonella) rugosa (Stephenson, 1923) † represented as Pseudorapa rugosa (Stephenson, 1923) † (original description)
Gervilliopsis emmonsi Stephenson, 1923 † (original description)
Glycymeris greenensis Stephenson, 1923 † (original description)
Glycymeris whiteleyensis Stephenson, 1923 † (original description)
Gyrotropis Gabb, 1877 † (source of synonymy)
Legumen concentricum Stephenson, 1923 † (original description)
Lima kerri Stephenson, 1923 † (original description)
Lima pelagica var. covensis Stephenson, 1923 † (original description)
Linearia magnoliensis Stephenson, 1923 † (original description)
Liopeplum thoracium (Conrad, 1873) † (basis of record)
Liopistha (Cymella) ironensis Stephenson, 1923 † (original description)
Lucina parva Stephenson, 1923 † (original description)
Modiolus hatcherensis Stephenson, 1923 † (original description)
Morea reticulata Stephenson, 1923 † (original description)
Morea reticulata var. tenuis Stephenson, 1923 † (original description)
Nemodon neusensis Stephenson, 1923 † (original description)
Nemodon punctus Stephenson, 1923 † (original description)
Nucula stantoni Stephenson, 1923 † (original description)
Ostrea blackensis Stephenson, 1923 † (original description)
Ostrea knappi Stephenson, 1923 † (original description)
Ostrea pratti Stephenson, 1923 † (original description)
Ostrea sloani Stephenson, 1923 † (original description)
Ostrea whitei Stephenson, 1923 † (original description)
Pecten berryi Stephenson, 1923 † (original description)
Periploma whitleyensis Stephenson, 1923 † (original description)
Pholadidea fragilis Stephenson, 1923 † (original description)
Pholadidea subconica Stephenson, 1923 † (original description)
Pholadomya ironensis Stephenson, 1923 † (original description)
Pholadomya varicosta Stephenson, 1923 † (original description)
Plicatula clarki Stephenson, 1923 † (original description)
Protarca Stephenson, 1923 † (original description)
Protarca obliqua Stephenson, 1923 † (original description)
Sargana Stephenson, 1923 † (original description)
Sarganidae Stephenson, 1923 † (original description)
Striarca pogunei Stephenson, 1923 † (original description)
Striarca samponensis Stephenson, 1923 † (original description)
Striarca subovalis Stephenson, 1923 † (original description)
Tellina simplex Stephenson, 1923 † (original description)
Trapezium truncatum Stephenson, 1923 † (original description)
Trigonarca elongata Stephenson, 1923 † (original description)
Trigonarca leoirensis Stephenson, 1923 † (original description)
Trigonia bartrami Stephenson, 1923 † accepted as Praescabrotrigonia bartrami (Stephenson, 1923) † (original description)
Trigonia haynensis Stephenson, 1923 † accepted as Kauffmanella haynensis (Stephenson, 1923) † (original description)
Trigonia marionensis Stephenson, 1923 † accepted as Gabbigonia marionensis (Stephenson, 1923) † (original description)
Turritella hillensis Stephenson, 1923 † (original description)
Turritella kerrensis Stephenson, 1923 † (original description)
Turritella pointensis Stephenson, 1923 † (original description)
Turritella quadrilira C. W. Johnson, 1898 † (additional source)
Turritella trilira Conrad, 1860 † (additional source)
Turritella vertebroides S. G. Morton, 1834 † (additional source)
Veniella mullinensis Stephenson, 1923 † (original description)