Opinions from A. W. Grabau 1931
- 'Anomia lawrenciana is recombined as Richthofenia lawrenciana'
- 'Athyris excavata belongs to Athyris'
- 'Aulosteges gigantiformis belongs to Aulosteges'
- 'Aulosteges grangeri belongs to Aulosteges'
- 'Avicula kazanensis is recombined as Pseudomonotis kazanensis'
- 'Aviculopecten englehardti is recombined as Euchondria englehardti'
- 'Bellerophon jonesianus belongs to Bellerophon'
- 'Bellerophon squamatus mongoliensis is recombined as Bellerophon mongoliensis'
- 'Camarophoria purdoniformis belongs to Camarophoria'
- 'Delthyris mucronatus is recombined as Mucrospirifer mucronatus'
- 'Derbyella bureri belongs to Derbyella'
- 'Derbyella minor belongs to Derbyella'
- 'Derbyella subrotunda belongs to Derbyella'
- 'Derbyia mongolica belongs to Derbyia'
- 'Dielasma giganteum anteplicatum belongs to Dielasma giganteum'
- 'Dielasma jisuense belongs to Dielasma'
- 'Dielasma orientalis belongs to Dielasma'
- 'Enteletes angulatoplicata belongs to Enteletes'
- 'Enteletes nucleola belongs to Enteletes'
- 'Enteletes obesa belongs to Enteletes'
- 'Enteletes subobesa belongs to Enteletes'
- 'Euomphalus mongolicus belongs to Euomphalus'
- 'Euomphalus simuloides belongs to Euomphalus'
- 'Flemingia gigas belongs to Flemingia'
- 'Flemingia tepeeformis belongs to Flemingia'
- 'Geinitzella tuberosasparsigemmata belongs to Geinitzella'
- 'Geyerella mongolica belongs to Geyerella'
- 'Gyronema altispiralis belongs to Gyronema'
- 'Hemiptychina mongolica belongs to Hemiptychina'
- 'Hemiptychina morrisi belongs to Hemiptychina'
- 'Hemiptychina sparsiplicata is recombined as Morrisina sparsiplicata'
- 'Hemiptychina sublaevis is recombined as Beecheria sublaevis'
- 'Hustedia lata belongs to Hustedia'
- 'Jisuina elegantula belongs to Jisuina'
- 'Luciella elongata belongs to Luciella'
- 'Luciella perlimbata belongs to Luciella'
- 'Luciella planoconvexa belongs to Luciella'
- 'Lyttonia nobilis belongs to Lyttonia'
- 'Macrocheilus avellanoides is recombined as Macrochilina avellanoides'
- 'Macrochilina (Sphaerodoma) transitoria belongs to Macrochilina (Sphaerodoma)'
- 'Marginifera gobiensis belongs to Marginifera' according to Chao 1927
- 'Marginifera morrisi belongs to Marginifera' according to Chao 1927
- 'Martinia distorta belongs to Martinia'
- 'Martinia orbicularis belongs to Martinia'
- 'Martinia osborni belongs to Martinia'
- 'Martinia rectangularis belongs to Martinia'
- 'Martinia rhomboidalis belongs to Martinia'
- 'Martinia sinensis belongs to Martinia'
- 'Martinia spissa belongs to Martinia'
- 'Meekella uralica belongs to Meekella'
- 'Morrisina nana belongs to Morrisina'
- 'Myalina falcata belongs to Myalina'
- 'Naticopsis khurensis [misspelled as Naticopsis khoovensis] belongs to Naticopsis'
- 'Notothyris berkeyi belongs to Notothyris'
- 'Notothyris irregularis belongs to Notothyris'
- 'Notothyris mongoliensis belongs to Notothyris'
- 'Orthotetes ruber is recombined as Orthothetina ruber'
- 'Orthotichia nana belongs to Orthotichia'
- 'Pecten subquinquelineatus is recombined as Deltopecten subquinquelineatus'
- 'Phymatifer coroniferus belongs to Phymatifer' according to de Koninck 1881
- 'Platystoma indicum is recombined as Strophostylus indicus'
- 'Polycoelia cylindrica belongs to Polycoelia'
- 'Polycoelia longiseptata belongs to Polycoelia' according to Grabau 1928
- 'Polycoelia longiseptata belongs to Polycoelia'
- 'Productus fasciatus belongs to Productus' according to Kutorga 1844
- 'Pseudamusium auriculatum belongs to Pseudamusium'
- 'Pseudomonotis (Aviculomonotis) belongs to Pseudomonotis'
- 'Pseudomonotis (Aviculomonotis) matthewi belongs to Pseudomonotis (Aviculomonotis)'
- 'Pseudomonotis (Aviculomonotis) mongoliensis belongs to Pseudomonotis (Aviculomonotis)'
- 'Pseudomonotis furcoplicatus belongs to Pseudomonotis'
- 'Reticularia indica is recombined as Squamularia indica'
- 'Reticularia waageni is recombined as Squamularia waageni'
- 'Retzia grandicosta is recombined as Hustedia grandicosta'
- 'Rhynchonella remota is recombined as Hustedia remota'
- 'Sanguinolites modiomorphoides belongs to Sanguinolites'
- 'Sanguinolites olseni belongs to Sanguinolites'
- 'Schellwienella regina belongs to Schellwienella'
- 'Soleniscus mongolicus belongs to Soleniscus'
- 'Solenospira mongolica belongs to Solenospira'
- 'Spirifer keilhavii is recombined as Spiriferella keilhavii'
- 'Spirifer nucleolus belongs to Spirifer' according to Kutorga 1842
- 'Spirifer nucleolus is recombined as Notothyris nucleolus'
- 'Spirifer rajah is recombined as Spiriferella rajah'
- 'Spirifer saranae is recombined as Spiriferella saranae'
- 'Spirifera moosakhailensis is recombined as Spirifer moosakhailensis'
- 'Spiriferella keilhaviiformis belongs to Spiriferella' according to Fredericks 1916
- 'Spiriferella keilhaviiformis belongs to Spiriferella'
- 'Spiriferella simplex belongs to Spiriferella'
- 'Spiriferella wimanni belongs to Spiriferella'
- 'Spiriferina mongolica belongs to Spiriferina'
- 'Squamularia elegantuloides belongs to Squamularia'
- 'Streptorhynchus broilii belongs to Streptorhynchus'
- 'Streptorhynchus kayseri belongs to Streptorhynchus'
- 'Streptorhynchus kayseri belongs to Streptorhynchus' according to Schellwien 1900
- 'Striatifera corniformis belongs to Striatifera' according to Chao 1927
- 'Terebratula superstes is recombined as Camarophoria superstes'
- 'Uncinulus mongolicus belongs to Uncinulus'
- 'Waagenophyllum mongoliense belongs to Waagenophyllum'
- 'Worthenia nana belongs to Worthenia'