Opinions from R. D. Hoare 1961
- 'Aclis robusta is recombined as Donaldina robusta'
- 'Allerisma terminalis is recombined as Wilkingia terminale'
- 'Allorisma leavenworthensis is recombined as Chaenomya leavenworthensis'
- 'Anomphalus umbilicatus belongs to Anomphalus'
- 'Anthracoceras missouriense belongs to Anthracoceras'
- 'Anthraconeilo taffiana belongs to Anthraconeilo'
- 'Antiquatonia belongs to Dictyoclostidae'
- 'Astartella compacta belongs to Astartella'
- 'Athyrididae [misspelled as Athyridae] belongs to Rostrospiracea'
- 'Athyris orbicularis is recombined as Cleiothyridina orbicularis'
- 'Aviculopecten gradicosta belongs to Aviculopecten'
- 'Aviculopecten infelix is recombined as Streblochondria infelix'
- 'Aviculopecten interlineatus is recombined as Annuliconcha interlineata'
- 'Aviculopecten pellucidus is recombined as Euchondria pellucida'
- 'Bellerophon (Bellerophon) planodorsatum belongs to Bellerophon (Bellerophon)'
- 'Bellerophon percarinatus is recombined as Bellerophon (Pharkidonotus) percarinatus'
- 'Bellerophon tenuilineata is recombined as Knightites (Retispira) tenuilineata'
- 'Buxtoniidae belongs to Productacea'
- 'Cardiomorpha belongs to Grammysiidae'
- 'Cardiomorpha missouriensis belongs to Cardiomorpha'
- 'Chaenomya belongs to Grammysiidae'
- 'Chonetacea belongs to Strophomenida'
- 'Chonetes mesolobus decipiens is recombined as Mesolobus mesolobus decipiens'
- 'Chonetes mesolobus euampygus is recombined as Mesolobus mesolobus euampygus'
- 'Chonetidae belongs to Chonetacea'
- 'Chonetinella flemingi crassiradiata belongs to Chonetinella flemingi'
- 'Clinopistha belongs to Solenomyidae'
- 'Coloceras liratum is recombined as Liroceras liratum'
- 'Composita belongs to Athyridae'
- 'Composita elongata belongs to Composita'
- 'Composita ovata belongs to Composita'
- 'Composita tetralobata belongs to Composita'
- 'Condrathyris belongs to Spiriferidae'
- 'Crania modesta is recombined as Petrocrania modesta'
- 'Craniacea belongs to Neotremata'
- 'Craniidae belongs to Craniacea'
- 'Crenipecten foerstii is a subjective synonym of Streblochondria tenuilineata'
- 'Desmoinesia belongs to Dictyoclostidae'
- 'Dictyoclostus americanus is a subjective synonym of Reticulatia huecoensis'
- 'Dictyoclostus tiawahensis is recombined as Reticulatia tiawahensis'
- 'Discina capuliforma is recombined as Orbiculoidea capuliformis'
- 'Discina convexa is a subjective synonym of Orbiculoidea capuliformis'
- 'Discina manhattanensis is a subjective synonym of Orbiculoidea missouriensis'
- 'Discina missouriensis is recombined as Orbiculoidea missouriensis'
- 'Edmondia aspenwallensis is corrected as Edmondia aspinwallensis and belongs to Edmondia'
- 'Edmondia ovata belongs to Edmondia'
- 'Edmondia radiata is recombined as Clinopistha radiata'
- 'Entolium attenuatum is recombined as Pernopecten attenuatus'
- 'Eolissochonetes belongs to Chonetidae'
- 'Eolissochonetes bilobatus belongs to Eolissochonetes'
- 'Eoptychia intermittens belongs to Eoptychia'
- 'Eulima peracuta is recombined as Meekospira peracuta'
- 'Fasciculiconcha belongs to Aviculopectinidae'
- 'Fasciculiconcha knighti belongs to Fasciculiconcha'
- 'Gervillia longa is recombined as Pteria longa'
- 'Glabrocingulum (Ananias) nodocostatus belongs to Glabrocingulum (Ananias)'
- 'Hemizyga (Hemizyga) inflata belongs to Hemizyga (Hemizyga)'
- 'Hemizyga (Hypantozyga) filicosta belongs to Hemizyga (Hypantozyga)'
- 'Hemizyga (Hyphantozyga) [misspelled as Hemizyga (Hypantozyga)] belongs to Hemizyga'
- 'Hemizyga (Plocezyga) convertacostata belongs to Hemizyga (Plocezyga)'
- 'Hemizyga (Plocezyga) percostata belongs to Hemizyga (Plocezyga)'
- 'Hemizyga (Plocezyga) tenuilirata belongs to Hemizyga (Plocezyga)'
- 'Hemizyga elegans is recombined as Hemizyga (Hemizyga) elegans'
- 'Juresania belongs to Buxtoniidae'
- 'Knightites (Retispira) nodulifera belongs to Knightites (Retispira)'
- 'Kozlowskia belongs to Marginiferinae'
- 'Leda bellistriata is recombined as Nuculana bellistriata'
- 'Leiorhynchoidea schucherti belongs to Leiorhynchoidea'
- 'Lima retifera belongs to Lima'
- 'Limopteria belongs to Pteriidae'
- 'Lingula carbonaria belongs to Lingula'
- 'Lingula mytiloides is a subjective synonym of Lingula carbonaria'
- 'Lingula umbonata is a subjective synonym of Lingula carbonaria'
- 'Linoproductus distortus belongs to Linoproductus'
- 'Linoproductus planiventralis belongs to Linoproductus'
- 'Loxonema attenuata semicostata is recombined as Palaeostylus (Pseudozygopleura) semicostatus'
- 'Loxonema nitidula is a subjective synonym of Soleniscus typicus'
- 'Loxonema regularis is recombined as Ianthinopsis regularis'
- 'Loxonema scitula is recombined as Pseudozygopleura scitula'
- 'Macrocheilus klipparti is recombined as Ianthinopsis klipparti'
- 'Macrocheilus paludinaeformis is recombined as Ianthinopsis paludinaeformis'
- 'Macrodon obsoletus is recombined as Parallelodon obsoletus'
- 'Macrodon sangamonensis is recombined as Parallelodon sangamonensis'
- 'Megaglossoceras belongs to Ephippioceratidae'
- 'Megaglossoceras pristinum belongs to Megaglossoceras'
- 'Mesolobus belongs to Chonetidae'
- 'Mesolobus mesolobus lioderma belongs to Mesolobus mesolobus'
- 'Mesolobus striatus belongs to Mesolobus'
- 'Microdoma conica is corrected as Microdoma conicum and belongs to Microdoma'
- 'Microptychis [misspelled as Microptychia] belongs to Caenogastropoda'
- 'Monopteria subalata is recombined as Limopteria subalata'
- 'Mooreoceras belongs to Pseudorthoceratidae'
- 'Mooreoceras normale belongs to Mooreoceras'
- 'Murchisonia lasallensis is recombined as Goniasma lasallensis'
- 'Murchisonia missouriensis is recombined as Murchisonia (Murchisonia) missouriensis'
- 'Natica ventrica is recombined as Naticopsis (Jedria) ventricosa'
- 'Naticella americana is recombined as Natiria americana'
- 'Naticopsis meeki is recombined as Naticopsis (Jedria) meeki'
- 'Neoglyphioceras bellilineatum is recombined as Owenoceras bellilineatum'
- 'Neospirifer goreii brevimarginatus belongs to Neospirifer goreii'
- 'Neospirifer latus belongs to Neospirifer'
- 'Neospirifer triplicatus alatus belongs to Neospirifer triplicatus'
- 'Neotremata belongs to Inarticulata'
- 'Nucula cylindrica is a subjective synonym of Cardiomorpha missouriensis'
- 'Nucula mercerensis is a subjective synonym of Cardiomorpha missouriensis'
- 'Nucula subrotundata is recombined as Nucula (Nuculopsis) subrotundata'
- 'Nuculites concentrica is recombined as Astartella concentrica'
- 'Nuculopsis girtyi belongs to Nuculopsis'
- 'Orbiculoidea belongs to Disciniidae'
- 'Orthis carbonaria is recombined as Rhipidomella carbonaria'
- 'Rhipidomella pecosi is a subjective synonym of Rhipidomella carbonaria'
- 'Orthisina crassa is recombined as Derbyia crassa'
- 'Orthoceras knoxensis is recombined as Pseudorthoceras knoxense'
- 'Orthonema inornatum belongs to Orthonema'
- 'Palaeostylus (Pseudozygopleura) eucharis belongs to Palaeostylus (Pseudozygopleura)'
- 'Palanatina indica belongs to Palanatina' according to Waagen 1880
- 'Parametacoceras belongs to Tainoceratidae'
- 'Parametacoceras bellatulum belongs to Parametacoceras'
- 'Patellilabia tentoriolum belongs to Patellilabia'
- 'Pecten aviculatus is recombined as Pernopecten aviculatus'
- 'Pecten tenuilineatus is recombined as Streblochondria tenuilineata'
- 'Pernopecten ohioensis belongs to Pernopecten'
- 'Petrocrania belongs to Craniidae'
- 'Phanerotrema welleri is recombined as Glabrocingulum (Ananias) welleri'
- 'Platyostoma nana is recombined as Naticopsis (Naticopsis) nana'
- 'Pleurophorus belongs to Pleurophoridae'
- 'Pleurophorus occidentalis belongs to Pleurophorus'
- 'Pleurophorus subellipticus is recombined as Volsellina subelliptica'
- 'Pleurophorus tropidophorus belongs to Pleurophorus'
- 'Pleurotomaria broadheadi is recombined as Shansiella broadheadi'
- 'Pleurotomaria grayvillensis is recombined as Glabrocingulum (Glabrocingulum) grayvillense'
- 'Pleurotomaria persimplex is recombined as Gosseletina persimplex'
- 'Pleurotomaria spironema is recombined as Gosseletina spironema'
- 'Posidonomya lasallensis is a subjective synonym of Annuliconcha interlineata'
- 'Productoidea is corrected as Productacea and belongs to Strophomenida'
- 'Productus (Linoproductus) was reranked as Linoproductus and belongs to Dictyoclostidae'
- 'Productus gallatinensis is recombined as Antiquatonia gallatinensis'
- 'Productus huecoensis is recombined as Reticulatia huecoensis'
- 'Productus nebrascensis is recombined as Juresania nebrascensis'
- 'Productus portlockianus is recombined as Antiquatonia portlockiana'
- 'Productus semireticularis hermosanus is recombined as Antiquatonia hermosanus'
- 'Promytilus annosus annosus belongs to Promytilus annosus'
- 'Pseudorthoceras belongs to Pseudorthoceratidae'
- 'Pseudozygopleura (Pseudozygopleura) assertonsoris is recombined as Palaeostylus (Pseudozygopleura) assertonsoris'
- 'Pseudozygopleura (Pseudozygopleura) condrai is recombined as Palaeostylus (Pseudozygopleura) condrai'
- 'Pseudozygopleura (Pseudozygopleura) moorei is recombined as Palaeostylus (Pseudozygopleura) moorei'
- 'Pseudozygopleura (Pseudozygopleura) pluricostata is recombined as Palaeostylus (Pseudozygopleura) pluricostata'
- 'Pseudozygopleura (Pseudozygopleura) schucherti is recombined as Palaeostylus (Pseudozygopleura) schucherti'
- 'Pseudozygopleura (Pseudozygopleura) trochus is recombined as Eoptychia trochus'
- 'Pseudozygopleura (Stephanozyga) subnodosa is recombined as Palaeostylus (Stephanozyga) subnodosa'
- 'Punctospirifer belongs to Spiriferinidae'
- 'Reticulatia belongs to Dictyoclostidae'
- 'Rhynchonella (Camerophoria) osagensis is recombined as Wellerella osagensis'
- 'Rostrospiracea belongs to Articulata'
- 'Schizodus affinis belongs to Schizodus'
- 'Schizodus amplus belongs to Schizodus'
- 'Soleniscus typicus belongs to Soleniscus'
- 'Solenomya (Janeia) trapezoides is recombined as Solemya trapezoides'
- 'Solenomya radiata is recombined as Solemya radiata'
- 'Solenomyidae belongs to Pelecypoda'
- 'Spirifer cameratus belongs to Spirifer' according to Morton 1836
- 'Spirifer cameratus is recombined as Neospirifer cameratus'
- 'Spirifer goreii is recombined as Neospirifer goreii'
- 'Spirifer kentuckensis is recombined as Punctospirifer kentuckyensis'
- 'Spirifer opimus belongs to Spirifer'
- 'Spirifer perplexa is recombined as Condrathyris perplexa'
- 'Spirifer rockymontani is corrected as Spirifer rockymontanus and belongs to Spirifer'
- 'Spiriferinidae belongs to Punctospiracea'
- 'Straparollus (Euomphalus) subrugosus is recombined as Straparollus (Amphiscapha) subrugosus'
- 'Streptacis crenimarginis is recombined as Microptychia crenimarginis'
- 'Stylifer primogenia is recombined as Ianthinopsis primogenius'
- 'Temnocheilus belongs to Tainoceratidae'
- 'Temnocheilus harneri belongs to Temnocheilus'
- 'Terebratula bovidens belongs to Terebratula' according to Morton 1836
- 'Terebratula bovidens is recombined as Beecheria bovidens'
- 'Terebratula mormonii is recombined as Hustedia mormoni'
- 'Terebratula subtilita is recombined as Composita subtilita'
- 'Trachydomia oweni belongs to Trachydomia'
- 'Trepospira (Trepospira) minima belongs to Trepospira (Trepospira)'
- 'Turritella stevensana is recombined as Donaldina stevensana'
- 'Volsellina belongs to Mytilidae'
- 'Wellerella tetrahedra belongs to Wellerella'