Opinions from M.L. Thein and M.H. Nitecki 1974
- 'Aclis robusta is recombined as Donaldina robusta'
- 'Aclisina bellilineata is recombined as Donaldina bellilineata'
- 'Aclisina golconda belongs to Aclisina'
- 'Aclisina marvinwelleri belongs to Aclisina'
- 'Auriptygma subtilistriatum is recombined as Leptoptygma subtilistriatum'
- 'Baylea coheni belongs to Baylea'
- 'Baylea okawensis belongs to Baylea'
- 'Bellerophon alternodosus is recombined as Knightites (Cymatospira) alternodosa'
- 'Bellerophon branneri is recombined as Knightites (Cymatospira) branneri'
- 'Bellerophon chesterensis belongs to Bellerophon'
- 'Bellerophon claxtonensis belongs to Bellerophon'
- 'Bellerophon menardensis belongs to Bellerophon'
- 'Bellerophon monroensis is recombined as Retispira monronensis'
- 'Bellerophon perelegans is recombined as Retispira perelegans'
- 'Bellerophon stamineus is recombined as Euphemites stamineus'
- 'Bellerophon textilis is recombined as Knightites (Retispira) textilis'
- 'Bembexia waterlooensis is recombined as Euconospira waterlooensis'
- 'Bucanopsis (Retispira) reticulata is recombined as Knightites (Retispira) reticulata'
- 'Bucanopsis deflectus is recombined as Retispira deflectus'
- 'Bucanopsis ornatus is recombined as Retispira ornatus'
- 'Bucanopsis waverliensis is recombined as Retispira waverliensis'
- 'Bulimella canaliculata is recombined as Girtyspira canaliculata'
- 'Bulimella elongata is recombined as Bulimorpha elongata'
- 'Bulimorpha elegans belongs to Bulimorpha'
- 'Bulimorpha minor belongs to Bulimorpha'
- 'Bulimorpha pygmaea is recombined as Girtyspira pygmaea'
- 'Bulimorpha whitfieldi belongs to Bulimorpha'
- 'Donaldina americana belongs to Donaldina'
- 'Donaldina marigoldensis belongs to Donaldina'
- 'Donaldina zadoe belongs to Donaldina'
- 'Eotrochus marigoldensis belongs to Eotrochus'
- 'Euconospira disjuncta belongs to Euconospira'
- 'Euconospira sturgeoni belongs to Euconospira'
- 'Euconospira varizona belongs to Euconospira'
- 'Euomphalus planodorsatus is recombined as Straparollus (Euomphalus) planidorsatus'
- 'Euphemites compressus belongs to Euphemites'
- 'Euphemites incarinatus belongs to Euphemites'
- 'Euphemites sacajawensis belongs to Euphemites'
- 'Euphemus randolphensis is recombined as Euphemites randolphensis'
- 'Globozyga belongs to Subulitinae'
- 'Globozyga tenuistriata belongs to Globozyga'
- 'Glyptotomaria (Dictyotomaria) yochelsoni belongs to Glyptotomaria (Dictyotomaria)'
- 'Gosseletina johnsoni belongs to Gosseletina'
- 'Kinkaidia belongs to Trochonematidae'
- 'Kinkaidia cancellata belongs to Kinkaidia'
- 'Knightites (Cymatospira) welleri belongs to Knightites (Cymatospira)'
- 'Lepetopsis chesterensis belongs to Lepetopsis'
- 'Leptoptygma golconda belongs to Leptoptygma'
- 'Loxonema bella is recombined as Meekospira bella'
- 'Loxonema regularis is recombined as Soleniscus regularis'
- 'Loxonema wortheni is recombined as Palaeozygopleura wortheni'
- 'Loxonema yandellana is recombined as Palaeozygopleura yandellana'
- 'Macrocheilus paludinaeformis is recombined as Ianthinopsis paludinaeformis'
- 'Macrocheilus stinesvillensis is recombined as Ianthinopsis stinesvillensis'
- 'Macrocheilus subcorpulentus is recombined as Ianthinopsis subcorpulentus'
- 'Macrochilina keyesi is recombined as Ianthinopsis keyesi'
- 'Macrochilina tantilla is recombined as Ianthinopsis tantilla'
- 'Meekospira bambooformis belongs to Meekospira'
- 'Meekospira batteni belongs to Meekospira'
- 'Meekospira evansvillensis belongs to Meekospira'
- 'Meekospira minuta belongs to Meekospira'
- 'Meekospira mississippiensis belongs to Meekospira'
- 'Mourlonia (Trechmannia) trochiformis is recombined as Euconospira trochiformis'
- 'Mourlonia angulata belongs to Mourlonia'
- 'Mourlonia minuta is recombined as Baylea minuta'
- 'Mourlonia northviewensis belongs to Mourlonia'
- 'Mourlonia sablei belongs to Mourlonia'
- 'Mourlonia solida is recombined as Euconospira solida'
- 'Murchisonia insculpta is recombined as Neilsonia insculpta'
- 'Murchisonia uninodocarinata is recombined as Neilsonia uninodocarinata'
- 'Natica carlyana is recombined as Naticopsis (Naticopsis) carlyana'
- 'Natica chesterensis is recombined as Naticopsis (Naticopsis) chesterensis'
- 'Natica littonana is recombined as Ianthinopsis littonana'
- 'Naticopsis (Naticopsis) mariona belongs to Naticopsis (Naticopsis)'
- 'Naticopsis remex is recombined as Naticopsis (Naticopsis) remex'
- 'Naticopsis waterlooensis is recombined as Naticopsis (Naticopsis) waterlooensis'
- 'Naticopsis wortheni is recombined as Strophostylus wortheni'
- 'Neilsonia welleri belongs to Neilsonia'
- 'Palaeozygopleura venusta belongs to Palaeozygopleura'
- 'Palaeozygopleura welleri belongs to Palaeozygopleura'
- 'Patella levettei is recombined as Lepetopsis levettei'
- 'Patellilabia chesterensis belongs to Patellilabia'
- 'Patellilabia tentoriolum belongs to Patellilabia'
- 'Patellostium laevigatum is recombined as Patellilabia laevigata'
- 'Phanerotrema brazerianum is recombined as Glyptomaria (Dictyotomaria) brazerianum'
- 'Phymatopleura nyi belongs to Phymatopleura'
- 'Platyceras (Orthonychia) chesterense is recombined as Orthonychia chesterensis'
- 'Platyceras haliotoides belongs to Platyceras'
- 'Platyceras subrotundum belongs to Platyceras'
- 'Platyzona americana belongs to Platyzona'
- 'Pleurotomaria (Murchisonia) conula is recombined as Euconospira conula'
- 'Pleurotomaria arkansana belongs to Pleurotomaria'
- 'Pleurotomaria aspeniana is recombined as Gosseletina aspeniana'
- 'Pleurotomaria brazerianum is recombined as Wellergyi brazerianum'
- 'Pleurotomaria broadheadi is recombined as Platyzona broadheadi'
- 'Pleurotomaria chesterensis is recombined as Borestus chesterensis'
- 'Pleurotomaria conica is recombined as Euconospira conica'
- 'Pleurotomaria meekana is recombined as Glyptomaria (Dictyotomaria) meekana'
- 'Pleurotomaria mississippiensis is recombined as Mourlonia mississippiensis'
- 'Pleurotomaria nodomarginata is recombined as Neilsonia nodomarginata'
- 'Pleurotomaria rotalia is recombined as Trepospira (Trepospira) rotalia'
- 'Pleurotomaria shumardi is recombined as Euconospira shumardi'
- 'Pleurotomaria subdecussatus is recombined as Wellergyi subdecussatus'
- 'Pleurotomaria subglobosa is recombined as Gosseletina subglobosa'
- 'Pleurotomaria textiligera is recombined as Mourlonia textiligera'
- 'Pleurotomaria trilineata belongs to Pleurotomaria'
- 'Porcellia chesterensis belongs to Porcellia'
- 'Ptychomphalus depressus is recombined as Glyptomaria (Dictyotomaria) depressus'
- 'Ptychomphalus fountainensis is recombined as Donaldina fountainensis'
- 'Ptychomphalus missouriensis is recombined as Mourlonia missouriensis'
- 'Ptychomphalus sinuatus is recombined as Baylea sinuatus'
- 'Ptychomphalus wortheni is recombined as Glyptomaria (Dictyotomaria) wortheni'
- 'Soleniscus glaber belongs to Soleniscus'
- 'Stegocoelia (Hypergonia) baldwinensis belongs to Stegocoelia (Hypergonia)'
- 'Stegocoelia (Stegocoelia) kentuckiensis belongs to Stegocoelia (Stegocoelia)'
- 'Stegocoelia (Stegocoelia) okawensis belongs to Stegocoelia (Stegocoelia)'
- 'Straparollus (Euomphalus) illinoisensis belongs to Straparollus (Euomphalus)'
- 'Strobeus reticulatus is recombined as Ianthinopsis reticulatus'
- 'Strophostylus chesterensis belongs to Strophostylus'
- 'Subulitinae belongs to Subulitidae'
- 'Trepospira (Angyomphalus) kentuckiensis belongs to Trepospira (Angyomphalus)'
- 'Trepospira (Trepospira) chesterensis belongs to Trepospira (Trepospira)'
- 'Turbonilla swallowiana is recombined as Aclisina swallowiana'
- 'Turritella stevensana is recombined as Donaldina stevensana'
- 'Wellergyi belongs to Ptychomphalides'
- 'Wellergyi chesterensis belongs to Wellergyi'
- 'Yochelsonospira pagoda belongs to Yochelsonospira'
- 'Yvania inclinata belongs to Yvania'