Opinions from L. B. Albright et al. 2019
- 'Aceratherium mite is recombined as Subhyracodon mitis'
- 'Acinonyx (Miracinonyx) was reranked as Miracinonyx and belongs to Felidae'
- 'Allophaiomys belongs to Arvicolini'
- 'Allophaiomys pliocaenicus belongs to Allophaiomys'
- 'Anchippus belongs to Equidae'
- 'Anchippus texanus belongs to Anchippus'
- 'Aphelops malacorhinus belongs to Aphelops'
- 'Arctodus belongs to Ursidae'
- 'Arctodus floridanus is recombined as Tremarctos floridanus'
- 'Arctodus pristinus belongs to Arctodus'
- 'Arvicolini belongs to Arvicolinae'
- 'Bootherium belongs to Bovidae'
- 'Boreostracon floridanus is recombined as Glyptotherium floridanum'
- 'Borophaginae belongs to Canidae'
- 'Borophagus belongs to Borophaginae'
- 'Bos bombifrons is recombined as Bootherium bombifrons'
- 'Callophoca belongs to Monachinae'
- 'Callophoca obscura belongs to Callophoca'
- 'Caninae belongs to Canidae'
- 'Canis belongs to Caninae'
- 'Canis armbrusteri belongs to Canis'
- 'Canis dirus belongs to Canis'
- 'Canis latrans belongs to Canis'
- 'Canis lepophagus belongs to Canis'
- 'Castor belongs to Castoridae'
- 'Castor canadensis belongs to Castor'
- 'Castor zibethicus is recombined as Ondatra zibethicus'
- 'Castoroides belongs to Castoridae'
- 'Castoroides ohioensis dilophidus is recombined as Castoroides dilophidus'
- 'Cervus belongs to Cervidae'
- 'Cervus elaphus belongs to Cervus'
- 'Cervus tarandus is recombined as Rangifer tarandus'
- 'Condylura belongs to Talpidae'
- 'Daeodon belongs to Entelodontidae'
- 'Dicotyles fossilis is recombined as Mylohyus fossilis'
- 'Didelphis belongs to Didelphidae'
- 'Didelphis virginiana belongs to Didelphis'
- 'Didymictis belongs to Viverravidae'
- 'Didymictis proteus belongs to Didymictis'
- 'Dinohyus mento is recombined as Daeodon mento'
- 'Eotheroides belongs to Dugongidae'
- 'Erethizon belongs to Erethizontidae'
- 'Erethizon bathygnathum belongs to Erethizon'
- 'Felis amnicola is recombined as Leopardus amnicola'
- 'Felis trumani is recombined as Miracinonyx trumani'
- 'Glyptotherium belongs to Glyptodontidae'
- 'Glyptotherium texanum belongs to Glyptotherium'
- 'Hipparion (Nannippus) was reranked as Nannippus and belongs to Equidae'
- 'Hippotherium peninsulatum is recombined as Nannippus peninsulatus'
- 'Holmesina belongs to Pampatheriidae'
- 'Hydrochoeridae was reranked as the subfamily Hydrochoerinae and belongs to Caviidae'
- 'Hydrochoerus pinckneyi is recombined as Neochoerus pinckneyi'
- 'Kraglievichia floridanus is recombined as Holmesina floridanus'
- 'Leopardus belongs to Felidae'
- 'Lepus palustris is recombined as Sylvilagus palustris'
- 'Megalonyx belongs to Megalonychidae'
- 'Megalonyx leptostomus belongs to Megalonyx'
- 'Metaxytherium belongs to Dugongidae'
- 'Metaxytherium albifontanum belongs to Metaxytherium'
- 'Monachinae belongs to Phocidae'
- 'Monotherium is corrected as Monatherium and belongs to Monachinae'
- 'Mylohyus belongs to Tayassuidae'
- 'Neochoerus belongs to Hydrochoerinae'
- 'Neochoerus dichroplax is recombined as Phugatherium dichroplax'
- 'Ondatra belongs to Ondatrinae'
- 'Ondatra idahoensis belongs to Ondatra'
- 'Ondatrinae belongs to Arvicolidae'
- 'Ontocetus belongs to Odobenidae'
- 'Ontocetus emmonsi belongs to Ontocetus'
- 'Osteoborus hilli is recombined as Borophagus hilli'
- 'Pachyarmatherium belongs to Pachyarmatheriidae'
- 'Pachyarmatherium leiseyi belongs to Pachyarmatherium'
- 'Perchoerus belongs to Tayassuidae'
- 'Phocanella belongs to Phocinae'
- 'Phocanella pumila belongs to Phocanella'
- 'Phocinae belongs to Phocidae'
- 'Phugatherium belongs to Hydrochoerinae'
- 'Procyon belongs to Procyonidae'
- 'Protosiren belongs to Protosirenidae'
- 'Rangifer belongs to Cervidae'
- 'Rhynchotherium belongs to Gomphotheriidae'
- 'Rhynchotherium falconeri belongs to Rhynchotherium'
- 'Sorex cristatus is recombined as Condylura cristata'
- 'Subhyracodon belongs to Rhinocerotidae'
- 'Sylvilagus belongs to Leporidae'
- 'Teleoceras belongs to Rhinocerotidae'
- 'Teleoceras guymonense belongs to Teleoceras'
- 'Tremarctos belongs to Ursidae'
- 'Ursus belongs to Ursidae'
- 'Ursus americanus belongs to Ursus'
- 'Ursus lotor is recombined as Procyon lotor'