Acar aspera (Conrad, 1854) † (basis of record)
Acar beadata Garvie, 2021 † (original description)
Acar petropolitana (Stenzel & E. K. Krause, 1957) † (new combination reference)
Acar salebrosus (Garvie, 1996) † (basis of record)
Acirsa (Notacirsa) Finlay, 1926 accepted as Acirsa Mörch, 1857 (basis of record)
Acirsa (Notacirsa) texana Garvie, 2021 † accepted as Acirsa texana Garvie, 2021 † (original description)
Acrocoelum cancellata palaeocenica Garvie, 2021 † accepted as Acrocoelum cancellatum palaeocenicum Garvie, 2021 † (original description)
Acteon cicatricosus Sohl, 1964 † (additional source)
Acteon pistilliformis Sohl, 1964 † (additional source)
Acteon pseudotypica Garvie, 2021 † (original description)
Acteon pseudotypica fossa Garvie, 2021 † (original description)
Amaea (Confusiscala) paleocaenica Garvie, 2021 † accepted as Confusiscala paleocaenica (Garvie, 2021) † (original description)
Aquilofusus antiqua Garvie, 2021 † (original description)
Architectonica sylvaerupis (G. D. Harris, 1896) † (additional source)
Arcopsis eba (M. A. Hanna, 1927) † (basis of record)
Arcopsis subrhombus Garvie, 2021 † (original description)
Arcopsis tumulus Garvie, 2021 † (original description)
Atrina cawcawensis (G. D. Harris, 1919) † (additional source)
Attenuata danica Garvie, 2021 † (original description)
Baluchicardia eoplata Garvie, 2021 † (original description)
Bieleraxis Garvie, 2021 † (original description)
Bieleraxis altis Garvie, 2021 † (original description)
Bieleraxis discoidea Garvie, 2021 † (original description)
Bittium koeneni O. Meyer, 1886 † (additional source)
Bittium prekoeneni Garvie, 2021 † (original description)
Cadulus (Gadila) praepalmerae Garvie, 2021 † accepted as Gadila praepalmerae (Garvie, 2021) † (original description)
Caecum (Meioceras) texanum Garvie, 2021 † accepted as Meioceras texanum (Garvie, 2021) † (original description)
Calorebama Squires, 1989 † (additional source)
Calorebama unicarinata (Aldrich, 1886) † (additional source)
Calyptraea aperta (Solander, 1766) † (basis of record)
Calyptraphorus velusus Garvie, 2021 † (original description)
Campylacrum texanum Garvie, 2021 † (original description)
Campylacrum texanum crassum Garvie, 2021 † (original description)
Capulus americanus Conrad, 1854 † (additional source)
Capulus gelus Garvie, 2021 † (original description)
Caryocorbula alabamiensis (I. Lea, 1833) † (additional source)
Caryocorbula kennedyi (J. A. Gardner, 1935) † (basis of record)
Caryocorbula monmouthensis (J. A. Gardner, 1916) † (basis of record)
Caryocorbula praefigera Garvie, 2021 † (original description)
Cenorhytis Garvie, 2021 † (original description)
Cenorhytis groesbecki Garvie, 2021 † (original description)
Cenorhytis hatchetigbeensis (Aldrich, 1886) † (new combination reference)
Cenorhytis pomonkensis (W. B. Clark & G. C. Martin, 1901) † (new combination reference)
Cenorhytis potomacensis (W. B. Clark & G. C. Martin, 1901) † (new combination reference)
Cerithiella acuta Garvie, 2021 † (original description)
Cerithiella chamberlaini (C. W. Johnson, 1899) † (additional source)
Cerithiella fluviatilis (Aldrich, 1897) † (additional source)
Cerithiella heckscheri K. van W. Palmer, 1937 † (additional source)
Cerithiella langdoni (Aldrich, 1885) † (additional source)
Cerithiscala parvibrazosa Garvie, 2021 † (original description)
Cerithiscala tehuacana Garvie, 2021 † (original description)
Charonia autopsis (Conrad, 1860) † (basis of record)
Chevallieria texanopsis Garvie, 2021 † (original description)
Claibornicardia linguinodifera (Heaslip, 1968) † (basis of record)
Clava (Semivertagus) scriba Garvie, 2021 † accepted as Rhinoclavis (Semivertagus) scriba (Garvie, 2021) † represented as Rhinoclavis scriba (Garvie, 2021) † (original description)
Cochlespira (Tahusyrinx) laevis Garvie, 2021 † accepted as Cochlespira laevis Garvie, 2021 † (original description)
Cochlespira engonata Conrad, 1865 † (additional source)
Confusiscala juvenca Saul & Popenoe, 1993 † (additional source)
Conradconfusus texanus Garvie, 2021 † (original description)
Corbula milium Dall, 1898 † (basis of record)
Corbula subcompressa Gabb, 1860 † (additional source)
Corbulamella F. B. Meek & Hayden, 1857 † (basis of record)
Corbulamella palaeocenica Garvie, 2021 † (original description)
Corbulamella striatula (J. De C. Sowerby, 1827) † (basis of record)
Corbulamella suffalciata Wade, 1926 † (additional source)
Coronia argilla Garvie, 2021 † (original description)
Coronia argilla lata Garvie, 2021 † (original description)
Coronia argilla tenuia Garvie, 2021 † (original description)
Crassaseila Garvie, 2021 † (original description)
Crassaseila paleocenica Garvie, 2021 † (original description)
Crassaseila ripleyana Garvie, 2021 † (original description)
Crassatella ioannes (J. A. Gardner, 1935) † (basis of record)
Crassatellina Meek, 1871 † (basis of record)
Crassatellina hollandi Feldman & Kammer, 1976 † (additional source)
Crassatellina paleocaenica Garvie, 2021 † (original description)
Crassatellina paleocaenica regularis Garvie, 2021 † (original description)
Crenaturricula crenatospira (J. G. Cooper, 1894) † (additional source)
Crenaturricula minuta Garvie, 2021 † (original description)
Creonella hebetertia Garvie, 2021 † (original description)
Creonella sonjae Rosenkrantz, 1970 † (additional source)
Cryptochorda paleocaenica Garvie, 2021 † (original description)
Cucullaea macrodonta Whitfield, 1865 † (additional source)
Cucullaea solenensis Stanton, 1921 † (additional source)
Cucullaea texana J. A. Gardner, 1923 † (basis of record)
Cuspidaria (Tergulina) Noszky, 1939 † represented as Cuspidaria Nardo, 1840 (basis of record)
Cuspidaria (Tergulina) koreanica H. Noda & Yoon, 1978 † represented as Cuspidaria koreanica H. Noda & Yoon, 1978 † (basis of record)
Cuspidaria (Tergulina) sulcosa (Noszky, 1939) † represented as Cuspidaria sulcosa (Noszky, 1939) † (basis of record)
Cuspidaria (Tergulina) texana Garvie, 2021 † represented as Cuspidaria texana Garvie, 2021 † (original description)
Cuspidaria grandis Stephenson, 1941 † (additional source)
Cylichna (Cylichnopsis) elliptica Garvie, 2021 † represented as Cylichna elliptica Garvie, 2021 † (original description)
Cymatium (Cymatium) danianum Garvie, 2021 † accepted as Cymatium danianum Garvie, 2021 † (original description)
Diplodonta (Diplodonta) frosti Garvie, 2021 † represented as Diplodonta frosti Garvie, 2021 † (original description)
Diplodonta (Microstagon) paleocaenica Garvie, 2021 † accepted as Microstagon paleocaenicum (Garvie, 2021) † (original description)
Diplodonta marlboroensis W. B. Clark & G. C. Martin, 1901 † (additional source)
Diplodonta petropolitana Stenzel, 1957 † (additional source)
Diplodonta satex J. A. Gardner, 1927 † (additional source)
Discotectonica paracutissima Garvie, 2021 † (original description)
Discotectonica phoenicea (J. A. Gardner, 1935) † (new combination reference)
Doliella deprimere (Garvie, 2013) † (basis of record)
Doliella parnitens Garvie, 2021 † (original description)