Opinions from G. A. Cooper and R. E. Grant 1976
- 'Acolosia anomala belongs to Acolosia'
- 'Acolosia elliptica belongs to Acolosia'
- 'Acolosia exasperata belongs to Acolosia'
- 'Acolosia glabra belongs to Acolosia'
- 'Acolosia magna belongs to Acolosia'
- 'Acolosia recepta belongs to Acolosia'
- 'Allorhynchus circulare belongs to Allorhynchus'
- 'Allorhynchus concentricum belongs to Allorhynchus'
- 'Allorhynchus formulosum belongs to Allorhynchus'
- 'Allorhynchus permianus is corrected as Allorhynchus permianum and belongs to Allorhynchus'
- 'Allorhynchus triangulatum belongs to Allorhynchus'
- 'Allorhynchus variabile belongs to Allorhynchus'
- 'Allorhynchus venustulum belongs to Allorhynchus'
- 'Ambocoelia guadalupensis belongs to Ambocoelia' according to Girty 1909
- 'Ambocoelia guadalupensis is recombined as Crurithyris guadalupensis'
- 'Amphipella attenuata belongs to Amphipella'
- 'Anomaloria anomala belongs to Anomaloria'
- 'Anteridocus bicostatus belongs to Anteridocus'
- 'Anteridocus erugatus belongs to Anteridocus'
- 'Anteridocus eximius belongs to Anteridocus'
- 'Anteridocus gongylus belongs to Anteridocus'
- 'Anteridocus paucicostatus belongs to Anteridocus'
- 'Anteridocus seminudus belongs to Anteridocus'
- 'Anteridocus subcarinatus belongs to Anteridocus'
- 'Anteridocus triangulatus belongs to Anteridocus'
- 'Antronaria dissona belongs to Antronaria'
- 'Antronaria emarginata belongs to Antronaria'
- 'Antronaria indentata belongs to Antronaria'
- 'Antronaria pluricosta belongs to Antronaria'
- 'Antronaria specialis belongs to Antronaria'
- 'Antronaria speciosa belongs to Antronaria'
- 'Antronaria spectabilis belongs to Antronaria'
- 'Antronaria titania belongs to Antronaria'
- 'Antronaria voluminosa belongs to Antronaria'
- 'Aphaurosia rotundata belongs to Aphaurosia'
- 'Aphaurosia scutata belongs to Aphaurosia'
- 'Athyris acutomarginalis is recombined as Cleiothyridina acutomarginalis'
- 'Attenuatella texana belongs to Attenuatella'
- 'Bryorhynchus plicatum belongs to Bryorhynchus'
- 'Camarophoria bisulcata is recombined as Bryorhynchus bisulcatum'
- 'Camarophoria deloi is a subjective synonym of Stenoscisma hueconianum'
- 'Camarophoria hueconiana is recombined as Stenoscisma hueconianum'
- 'Camarophoria inaequalis is recombined as Stenoscisma inaequale'
- 'Camarophoria venusta belongs to Camarophoria' according to Girty 1909
- 'Camarophoria venusta is recombined as Stenoscisma venustum'
- 'Camerophoria alpina is recombined as Stenoscisma alpinum'
- 'Camerophoria latissima is recombined as Stenoscisma latissimum'
- 'Camerophoria nucula is recombined as Stenoscisma nuculum'
- 'Camerophoria sanctispiritus is recombined as Stenoscisma sanctispiritus'
- 'Camerophoria swalloviana is recombined as Anteridocus swallovianus'
- 'Cartorhium chelomatum belongs to Cartorhium'
- 'Cartorhium coristum belongs to Cartorhium'
- 'Cartorhium orbiculatum belongs to Cartorhium'
- 'Cartorhium retusum belongs to Cartorhium'
- 'Cartorhium vidriense belongs to Cartorhium'
- 'Cartorhium zoyei belongs to Cartorhium'
- 'Cenorhynchia atmeta belongs to Cenorhynchia'
- 'Cenorhynchia camerata belongs to Cenorhynchia'
- 'Cenorhynchia fracida belongs to Cenorhynchia'
- 'Cenorhynchia hebata belongs to Cenorhynchia'
- 'Cenorhynchia mitigata belongs to Cenorhynchia'
- 'Cenorhynchia nasuta belongs to Cenorhynchia'
- 'Cenorhynchia parvula belongs to Cenorhynchia'
- 'Cenorhynchia pentagonalis belongs to Cenorhynchia'
- 'Cenorhynchia saginata belongs to Cenorhynchia'
- 'Cenorhynchia transversa belongs to Cenorhynchia'
- 'Cenorhynchia triangulata belongs to Cenorhynchia'
- 'Cenorhynchia unicostata belongs to Cenorhynchia'
- 'Cenorhynchia ventricosa belongs to Cenorhynchia'
- 'Chaeniorhynchus inauris belongs to Chaeniorhynchus'
- 'Chaeniorhynchus salutare belongs to Chaeniorhynchus'
- 'Chaeniorhynchus transversum belongs to Chaeniorhynchus'
- 'Cleiothyridina ciriacksi belongs to Cleiothyridina'
- 'Cleiothyridina mulsa belongs to Cleiothyridina'
- 'Cleiothyridina nana belongs to Cleiothyridina'
- 'Cleiothyridina pilularis belongs to Cleiothyridina'
- 'Cleiothyridina rara belongs to Cleiothyridina'
- 'Cleiothyridina rectimarginata belongs to Cleiothyridina'
- 'Composita affinis belongs to Composita' according to Girty 1909
- 'Composita affinis belongs to Composita'
- 'Composita apheles belongs to Composita'
- 'Composita apsidata belongs to Composita'
- 'Composita bucculenta belongs to Composita'
- 'Composita costata belongs to Composita'
- 'Composita cracens belongs to Composita'
- 'Composita crassa belongs to Composita'
- 'Composita discina belongs to Composita'
- 'Composita emarginata belongs to Composita' according to Girty 1909
- 'Composita emarginata belongs to Composita'
- 'Composita enormis belongs to Composita'
- 'Composita guadalupensis is a subjective synonym of Composita mexicana'
- 'Composita imbricata belongs to Composita'
- 'Composita nucella belongs to Composita'
- 'Composita parasulcata belongs to Composita'
- 'Composita pilula belongs to Composita'
- 'Composita prospera belongs to Composita'
- 'Composita pyriformis belongs to Composita'
- 'Composita quantilla belongs to Composita'
- 'Composita stalagmium belongs to Composita'
- 'Composita strongyle belongs to Composita'
- 'Crurithyris attenuata is recombined as Attenuatella attenuata'
- 'Crurithyris inflata belongs to Crurithyris'
- 'Crurithyris longirostris belongs to Crurithyris'
- 'Crurithyris major belongs to Crurithyris'
- 'Crurithyris minutalis belongs to Crurithyris'
- 'Crurithyris sulcata belongs to Crurithyris'
- 'Crurithyris tholiaphor belongs to Crurithyris'
- 'Crurithyris tumibilis belongs to Crurithyris'
- 'Deltarina magnicostata belongs to Deltarina'
- 'Divaricosta squarrosa belongs to Divaricosta'
- 'Divaricosta vagabunda belongs to Divaricosta'
- 'Eliva inflata belongs to Eliva'
- 'Eliva shumardi belongs to Eliva'
- 'Elivina annectens belongs to Elivina'
- 'Elivina detecta belongs to Elivina'
- 'Eridmatus marathonensis belongs to Eridmatus'
- 'Fascicosta bella belongs to Fascicosta'
- 'Fascicosta elongata belongs to Fascicosta'
- 'Gypospirifer anancites belongs to Gypospirifer'
- 'Gypospirifer gryphus belongs to Gypospirifer'
- 'Gypospirifer nelsoni belongs to Gypospirifer'
- 'Hemileurus runcinatus belongs to Hemileurus'
- 'Heteraria blakemorei belongs to Heteraria'
- 'Holosia ovalis belongs to Holosia'
- 'Holosia ovoidea belongs to Holosia'
- 'Holosia regularis belongs to Holosia'
- 'Iotina minuta belongs to Iotina'
- 'Leiorhynchoidea amygdaloidea belongs to Leiorhynchoidea'
- 'Leiorhynchoidea rotundidorsa belongs to Leiorhynchoidea'
- 'Leiorhynchoidea scelesta belongs to Leiorhynchoidea'
- 'Leiorhynchoidea sulcata belongs to Leiorhynchoidea'
- 'Lepidospirifer angulatus belongs to Lepidospirifer'
- 'Lepidospirifer demissus belongs to Lepidospirifer'
- 'Lepidospirifer inferus belongs to Lepidospirifer'
- 'Lirellaria costellata belongs to Lirellaria'
- 'Lirellaria crassa belongs to Lirellaria'
- 'Lirellaria diabloensis belongs to Lirellaria'
- 'Madarosia anterolamellata belongs to Madarosia'
- 'Madarosia pentagona belongs to Madarosia'
- 'Martinia causaria belongs to Martinia'
- 'Martinia cruenta belongs to Martinia'
- 'Martinia exigua belongs to Martinia'
- 'Martinia fucina belongs to Martinia'
- 'Martinia miranda belongs to Martinia'
- 'Martinia nealranchensis belongs to Martinia'
- 'Martinia renfroae belongs to Martinia'
- 'Martinia rhomboidalis belongs to Martinia' according to Girty 1909
- 'Martinia rhomboidalis belongs to Martinia'
- 'Martinia shumardiana belongs to Martinia' according to Girty 1909
- 'Martinia shumardiana is a subjective synonym of Martinia rhomboidalis'
- 'Martinia wolfcampensis belongs to Martinia'
- 'Neophricadothyris bullata belongs to Neophricadothyris'
- 'Neophricadothyris catatona belongs to Neophricadothyris'
- 'Neophricadothyris conara belongs to Neophricadothyris'
- 'Neophricadothyris cordata belongs to Neophricadothyris'
- 'Neophricadothyris crassibecca belongs to Neophricadothyris'
- 'Neophricadothyris transversa belongs to Neophricadothyris'
- 'Neospirifer amphigyus belongs to Neospirifer'
- 'Neospirifer apothescelus belongs to Neospirifer'
- 'Neospirifer formulosus belongs to Neospirifer'
- 'Neospirifer mansuetus belongs to Neospirifer'
- 'Neospirifer neali belongs to Neospirifer'
- 'Neospirifer notialis belongs to Neospirifer'
- 'Neospirifer placidus belongs to Neospirifer'
- 'Neospirifer thescelus belongs to Neospirifer'
- 'Nucleospira cunctata belongs to Nucleospira'
- 'Paranorella aquilonia belongs to Paranorella'
- 'Paranorella comptula belongs to Paranorella'
- 'Paranorella imperialis belongs to Paranorella'
- 'Phrenophoria anterocostata belongs to Phrenophoria'
- 'Phrenophoria bicostata belongs to Phrenophoria'
- 'Phrenophoria compressa belongs to Phrenophoria'
- 'Phrenophoria corpulenta belongs to Phrenophoria'
- 'Phrenophoria depressa belongs to Phrenophoria'
- 'Phrenophoria incomitata belongs to Phrenophoria'
- 'Phrenophoria irregularis belongs to Phrenophoria'
- 'Phrenophoria nesiotes belongs to Phrenophoria'
- 'Phrenophoria nudumbona belongs to Phrenophoria'
- 'Phrenophoria pentagonalis belongs to Phrenophoria'
- 'Phrenophoria perplexa belongs to Phrenophoria'
- 'Phrenophoria pinguiformis belongs to Phrenophoria'
- 'Phrenophoria planifrons belongs to Phrenophoria'
- 'Phrenophoria planiventra belongs to Phrenophoria'
- 'Phrenophoria repugnans belongs to Phrenophoria'
- 'Phrenophoria ventricosa belongs to Phrenophoria'
- 'Phrenophoria vetula belongs to Phrenophoria'
- 'Pontisia costata belongs to Pontisia'
- 'Pontisia franklinensis belongs to Pontisia'
- 'Pontisia kingi belongs to Pontisia'
- 'Pontisia magnicostata belongs to Pontisia'
- 'Pontisia parva belongs to Pontisia'
- 'Pontisia robusta belongs to Pontisia'
- 'Pontisia stehlii belongs to Pontisia'
- 'Pontisia truncata belongs to Pontisia'
- 'Pontisia ventricola belongs to Pontisia'
- 'Pontisia wolfcampensis belongs to Pontisia'
- 'Pseudomartinia is a subjective synonym of Martinia'
- 'Pseudomartinia martinezi is recombined as Martinia martinezi'
- 'Psilocamara hesperia belongs to Psilocamara'
- 'Ptilotorhynchus delicatum belongs to Ptilotorhynchus'
- 'Ptygmactrum acutum belongs to Ptygmactrum'
- 'Ptygmactrum angulatum belongs to Ptygmactrum'
- 'Ptygmactrum depressum belongs to Ptygmactrum'
- 'Ptygmactrum extensum belongs to Ptygmactrum'
- 'Ptygmactrum mordicum belongs to Ptygmactrum'
- 'Ptygmactrum spiculatum belongs to Ptygmactrum'
- 'Pugnax bidentata belongs to Pugnax' according to Girty 1909
- 'Pugnax bidentata is recombined as Wellerella bidentata'
- 'Pugnax elegans belongs to Pugnax' according to Girty 1909
- 'Pugnax elegans is recombined as Tautosia elegans'
- 'Pugnax gratiosa belongs to Pugnax' according to Girty 1909
- 'Pugnax gratiosa is recombined as Bryorhynchus gratiosum'
- 'Pugnax nitida belongs to Pugnax' according to Girty 1909
- 'Pugnax nitida is recombined as Bryorhynchus nitidum'
- 'Pugnax pinguis belongs to Pugnax' according to Girty 1909
- 'Pugnax pinguis is recombined as Phrenophoria pinguis'
- 'Pugnax pusilla is recombined as Petasmatherus pusillus'
- 'Pugnax shumardiana belongs to Pugnax' according to Girty 1909
- 'Pugnax shumardiana is recombined as Tautosia shumardiana'
- 'Pugnoides mesicostalis is recombined as Antronaria mesicostalis'
- 'Pugnoides transversus is recombined as Antronaria transversa'
- 'Rallacosta actina belongs to Rallacosta'
- 'Rallacosta imporcata belongs to Rallacosta'
- 'Rallacosta laminata belongs to Rallacosta'
- 'Rallacosta xystica belongs to Rallacosta'
- 'Rhynchonella indentata is recombined as Strigirhynchia indentata'
- 'Rhynchonella longaeva belongs to Rhynchonella' according to Girty 1909
- 'Rhynchonella longaeva is recombined as Fascicosta longaeva'
- 'Spirifer (Neospirifer) bakeri is recombined as Neospirifer bakeri'
- 'Spirifer (Neospirifer) costella is recombined as Lepidospirifer costellus'
- 'Spirifer (Neospirifer) huecoensis is recombined as Neospirifer huecoensis'
- 'Spirifer (Neospirifer) latus is recombined as Cartorhium latum'
- 'Spirifer (Neospirifer) latus is recombined as Spirifer mexicanus latus' according to King 1931
- 'Spirifer (Neospirifer) latus is recombined as Cartorhium latum'
- 'Spirifer condor is recombined as Gypospirifer condor'
- 'Spirifer deroissyi is recombined as Cleiothyridina deroissyi'
- 'Spirifer guadalupensis is a nomen vanum'
- 'Spirifer infraplica is recombined as Gypospirifer infraplicus'
- 'Spirifer mexicanus is recombined as Cartorhium mexicanum'
- 'Spirifer mexicanus compactus is recombined as Elivina compacta'
- 'Spirifer sulcifera is recombined as Spiriferella sulcifer'
- 'Spiriferella calcarata belongs to Spiriferella'
- 'Spiriferella clypeata belongs to Spiriferella'
- 'Spiriferella embrithes belongs to Spiriferella'
- 'Spiriferella gloverae belongs to Spiriferella'
- 'Spiriferella gravis belongs to Spiriferella'
- 'Spiriferella levis belongs to Spiriferella'
- 'Spiriferella propria belongs to Spiriferella'
- 'Spiriferinaella limata belongs to Spiriferinaella'
- 'Spiriferinaella medialis belongs to Spiriferinaella'
- 'Spiriferinaella scalpata belongs to Spiriferinaella'
- 'Squamularia subquadrata is recombined as Astegosia subquadrata'
- 'Stenoscisma abbreviatum belongs to Stenoscisma'
- 'Stenoscisma aberrans belongs to Stenoscisma'
- 'Stenoscisma amoenum belongs to Stenoscisma'
- 'Stenoscisma aptatum belongs to Stenoscisma'
- 'Stenoscisma bellatulum belongs to Stenoscisma'
- 'Stenoscisma bonum belongs to Stenoscisma'
- 'Stenoscisma calvatum belongs to Stenoscisma'
- 'Stenoscisma camurum belongs to Stenoscisma'
- 'Stenoscisma doricranum belongs to Stenoscisma'
- 'Stenoscisma exutum belongs to Stenoscisma'
- 'Stenoscisma fabarium belongs to Stenoscisma'
- 'Stenoscisma hadrum belongs to Stenoscisma'
- 'Stenoscisma kala is corrected as Stenoscisma kalum and belongs to Stenoscisma'
- 'Stenoscisma levicostum belongs to Stenoscisma'
- 'Stenoscisma maniculum belongs to Stenoscisma'
- 'Stenoscisma multicosta is corrected as Stenoscisma multicostum and belongs to Stenoscisma'
- 'Stenoscisma myioides belongs to Stenoscisma'
- 'Stenoscisma oblisum belongs to Stenoscisma'
- 'Stenoscisma pansum belongs to Stenoscisma'
- 'Stenoscisma peneleve belongs to Stenoscisma'
- 'Stenoscisma problematicum belongs to Stenoscisma'
- 'Stenoscisma pyraustoides belongs to Stenoscisma'
- 'Stenoscisma renode belongs to Stenoscisma'
- 'Stenoscisma repigratum belongs to Stenoscisma'
- 'Stenoscisma trabeatum belongs to Stenoscisma'
- 'Stenoscisma triquetrum belongs to Stenoscisma'
- 'Strigirhynchia elongata belongs to Strigirhynchia'
- 'Strigirhynchia transversa belongs to Strigirhynchia'
- 'Tautosia angulata belongs to Tautosia'
- 'Tautosia distorta belongs to Tautosia'
- 'Tautosia expansa belongs to Tautosia'
- 'Tautosia fastigiata belongs to Tautosia'
- 'Tautosia galbina belongs to Tautosia'
- 'Tautosia podistra belongs to Tautosia'
- 'Tautosia pulchra belongs to Tautosia'
- 'Tautosia transenna belongs to Tautosia'
- 'Terebratula mexicana belongs to Terebratula' according to Hall 1857
- 'Terebratula mexicana is recombined as Composita mexicana'
- 'Terebratuloidea lenumbona is recombined as Tautosia lenumbona'
- 'Torynechus alectorius belongs to Torynechus'
- 'Torynechus caelatus belongs to Torynechus'
- 'Tricoria hirpex belongs to Tricoria'
- 'Trophisina fenaria belongs to Trophisina'
- 'Wellerella girtyi belongs to Wellerella'
- 'Wellerella longicosta is recombined as Pontisia longicosta'
- 'Wellerella magnisepta is recombined as Tautosia magnisepta'
- 'Wellerella nanas is recombined as Pontisia nanas'
- 'Wellerella nitidula belongs to Wellerella'
- 'Xenosaria exotica belongs to Xenosaria'