Anodontopsis amygdalaeformis Walcott, 1884 † (original description)
Bellerophon combsi Walcott, 1884 † (original description)
Bellerophon perplexa Walcott, 1884 † (original description)
Conocardium nevadensis Walcott, 1884 † (original description)
Dystactella insularis Walcott, 1884 † (original description)
Ecculiomphalus devonicus Walcott, 1884 † (original description)
Euomphalus eurekensis Walcott, 1884 † (original description)
Grammysia minor Walcott, 1884 † accepted as Grammysioidea minor (Walcott, 1884) † (original description)
Leptodesma transversa Walcott, 1884 † (original description)
Limoptera sarmenticia Walcott, 1884 † (original description)
Loxonema bella Walcott, 1884 † accepted as Bellazona bella (Walcott, 1884) † (original description)
Megambonia occidualis Walcott, 1884 † (original description)
Microdon (Cypricardella) J. Hall, 1858 † accepted as Cypricardella J. Hall, 1858 † (basis of record)
Microdon (Cypricardella) macrostriatus Walcott, 1884 † (original description)
Modiomorpha altiforme Walcott, 1884 † (original description)
Modiomorpha oblonga Walcott, 1884 † (original description)
Modiomorpha obtusa Walcott, 1884 † (original description)
Mytilarca dubia Walcott, 1884 † (original description)
Nucula rescuensis Walcott, 1884 † (original description)
Nyassa parva Walcott, 1884 † (original description)
Pinna consimilis Walcott, 1884 † accepted as Orthopinna consimilis (Walcott, 1884) † (original description)
Pinna inexpectans Walcott, 1884 † accepted as Sulcatopinna inexpectans (Walcott, 1884) † (original description)
Platyceras conradi Walcott, 1884 † (original description)
Platyceras thetiforme Walcott, 1884 † (original description)
Platyceras undulatum Walcott, 1884 † (original description)
Platyschisma mccoyi Walcott, 1884 † accepted as Orecopia mccoyi (Walcott, 1884) † (original description)
Posidonomya devonica Walcott, 1884 † (original description)
Posidonomya laevis Walcott, 1884 † (original description)
Pterinea newarkensis Walcott, 1884 † (original description)
Sanguinolites combensis Walcott, 1884 † (original description)
Sanguinolites gracilis Walcott, 1884 † (original description)
Scenella conula Walcott, 1884 † accepted as Protoconchoides conula (Walcott, 1884) † (original description)
Schizodus (Cytherodon) J. Hall & Whitfield, 1873 † accepted as Cytherodon J. Hall & Whitfield, 1873 † accepted as Schizodus W. King, 1845 † (basis of record)
Schizodus (Cytherodon) orbicularis Walcott, 1884 † (original description)
Schizodus curtiformis Walcott, 1884 † (original description)
Schizodus deparcus Walcott, 1884 † (original description)
Schizodus pintoensis Walcott, 1884 † (original description)
Straparollus newarkensis Walcott, 1884 † (original description)

Nevada for Anodontopsis amygdalaeformis Walcott, 1884 † 
Nevada for Conocardium nevadensis Walcott, 1884 † 
Nevada for Dystactella insularis Walcott, 1884 † 
Nevada for Ecculiomphalus devonicus Walcott, 1884 † 
Nevada for Euomphalus eurekensis Walcott, 1884 † 
Nevada for Grammysia minor Walcott, 1884 † 
Nevada for Leptodesma transversa Walcott, 1884 † 
Nevada for Limoptera sarmenticia Walcott, 1884 † 
Nevada for Megambonia occidualis Walcott, 1884 † 
Nevada for Microdon (Cypricardella) macrostriatus Walcott, 1884 † 
Nevada for Modiomorpha altiforme Walcott, 1884 † 
Nevada for Modiomorpha oblonga Walcott, 1884 † 
Nevada for Modiomorpha obtusa Walcott, 1884 † 
Nevada for Mytilarca dubia Walcott, 1884 † 
Nevada for Nucula rescuensis Walcott, 1884 † 
Nevada for Nyassa parva Walcott, 1884 † 
Nevada for Pinna consimilis Walcott, 1884 † 
Nevada for Platyceras conradi Walcott, 1884 † 
Nevada for Platyceras thetiforme Walcott, 1884 † 
Nevada for Platyceras undulatum Walcott, 1884 † 
Nevada for Platyschisma mccoyi Walcott, 1884 † 
Nevada for Posidonomya devonica Walcott, 1884 † 
Nevada for Posidonomya laevis Walcott, 1884 † 
Nevada for Pterinea newarkensis Walcott, 1884 † 
Nevada for Sanguinolites combensis Walcott, 1884 † 
Nevada for Sanguinolites gracilis Walcott, 1884 † 
Nevada for Schizodus (Cytherodon) orbicularis Walcott, 1884 † 
Nevada for Straparollus newarkensis Walcott, 1884 †