Opinions from G. A. Cooper and R. E. Grant 1974

  • 'Acanthocrania alta belongs to Acanthocrania'
  • 'Acanthocrania conferta belongs to Acanthocrania'
  • 'Acanthocrania densispina belongs to Acanthocrania'
  • 'Acanthocrania intermedia belongs to Acanthocrania'
  • 'Acanthocrania magna belongs to Acanthocrania'
  • 'Acanthocrania minutispinosa belongs to Acanthocrania'
  • 'Acanthocrania platys belongs to Acanthocrania'
  • 'Acanthocrania regularis belongs to Acanthocrania'
  • 'Acanthocrania vasta belongs to Acanthocrania'
  • 'Adriana guadalupensis is recombined as Pseudoleptodus guadalupensis'
  • 'Bothrostegium compactum belongs to Bothrostegium'
  • 'Bothrostegium derbyoideum belongs to Bothrostegium'
  • 'Bothrostegium pusillum belongs to Bothrostegium'
  • 'Chelononia neali belongs to Chelononia'
  • 'Chelononia straminea belongs to Chelononia'
  • 'Choanodus anomalus belongs to Choanodus'
  • 'Choanodus irregularis belongs to Choanodus'
  • 'Choanodus perfectus belongs to Choanodus'
  • 'Collemataria batilliformis belongs to Collemataria'
  • 'Collemataria elongata belongs to Collemataria'
  • 'Collemataria gregaria belongs to Collemataria'
  • 'Collemataria irregularis belongs to Collemataria'
  • 'Collemataria platys belongs to Collemataria'
  • 'Collemataria spatulata belongs to Collemataria'
  • 'Coscinophora magnifica belongs to Coscinophora'
  • 'Coscinophora monilifera belongs to Coscinophora'
  • 'Coscinophora nodosa belongs to Coscinophora'
  • 'Derbyia belongs to Derbyiidae'
  • 'Derbyia bella belongs to Derbyia'
  • 'Derbyia carteri belongs to Derbyia'
  • 'Derbyia cincinnata belongs to Derbyia'
  • 'Derbyia complicata belongs to Derbyia'
  • 'Derbyia crenulata belongs to Derbyia' according to Girty 1909
  • 'Derbyia crenulata belongs to Derbyia'
  • 'Derbyia elevata belongs to Derbyia'
  • 'Derbyia filosa belongs to Derbyia'
  • 'Derbyia informis belongs to Derbyia'
  • 'Derbyia laqueata belongs to Derbyia'
  • 'Derbyia nasuta belongs to Derbyia' according to Girty 1909
  • 'Derbyia nasuta belongs to Derbyia'
  • 'Derbyia pannucia belongs to Derbyia'
  • 'Derbyia profunda belongs to Derbyia'
  • 'Derbyia scitula belongs to Derbyia'
  • 'Derbyia strophomenoidea belongs to Derbyia'
  • 'Derbyia texta belongs to Derbyia'
  • 'Derbyoides dunbari belongs to Derbyoides'
  • 'Derbyoides marathonensis belongs to Derbyoides'
  • 'Diplanus apochordus belongs to Diplanus'
  • 'Diplanus catatonus belongs to Diplanus'
  • 'Diplanus rarus belongs to Diplanus'
  • 'Diplanus redactus belongs to Diplanus'
  • 'Eolyttonia catilla belongs to Eolyttonia'
  • 'Eolyttonia chaotica belongs to Eolyttonia'
  • 'Eolyttonia circularis belongs to Eolyttonia'
  • 'Eolyttonia cornucopia belongs to Eolyttonia'
  • 'Eolyttonia gigantea belongs to Eolyttonia'
  • 'Eolyttonia parviconica belongs to Eolyttonia'
  • 'Eolyttonia phialiforma belongs to Eolyttonia'
  • 'Eolyttonia pocillata belongs to Eolyttonia'
  • 'Eolyttonia progressa belongs to Eolyttonia'
  • 'Geyerella americana belongs to Geyerella'
  • 'Geyerella americana belongs to Geyerella' according to Girty 1909
  • 'Geyerella hessi belongs to Geyerella'
  • 'Geyerella inexpectata belongs to Geyerella'
  • 'Geyerella kingorum belongs to Geyerella'
  • 'Goniarina appeli belongs to Goniarina'
  • 'Goniarina diabloensis belongs to Goniarina'
  • 'Goniarina futilis belongs to Goniarina'
  • 'Goniarina magniextensa belongs to Goniarina'
  • 'Goniarina pyelodes belongs to Goniarina'
  • 'Goniarina striata belongs to Goniarina'
  • 'Hypopsia versuta belongs to Hypopsia'
  • 'Isogramma concavum belongs to Isogramma'
  • 'Isogramma diabloense belongs to Isogramma'
  • 'Isogramma lobatum belongs to Isogramma'
  • 'Isogramma vidriense belongs to Isogramma'
  • 'Lepidocrania sparsispinosa belongs to Lepidocrania'
  • 'Lepidocrania sublamellosa belongs to Lepidocrania'
  • 'Lepidocrania tardispinosa belongs to Lepidocrania'
  • 'Leptodus americanus belongs to Leptodus' according to Girty 1909
  • 'Leptodus americanus is recombined as Collemataria americana'
  • 'Leptodus diabloensis is recombined as Eolyttonia diabloensis'
  • 'Leptodus guadalupensis belongs to Leptodus' according to Girty 1909
  • 'Leptodus marshalli is recombined as Collemataria marshalli'
  • 'Loxophragmus ellipticus belongs to Loxophragmus'
  • 'Lyttonia hortoni is recombined as Coscinophora hortoni'
  • 'Meekella angustiplicata belongs to Meekella'
  • 'Meekella attenuata belongs to Meekella'
  • 'Meekella attenuata belongs to Meekella' according to Girty 1909
  • 'Meekella calathica belongs to Meekella'
  • 'Meekella caperata belongs to Meekella'
  • 'Meekella circularis belongs to Meekella'
  • 'Meekella difficilis belongs to Meekella' according to Girty 1909
  • 'Meekella difficilis is a subjective synonym of Meekella skenoides'
  • 'Meekella enormis belongs to Meekella'
  • 'Meekella globosa is recombined as Niviconia globosa'
  • 'Meekella grandis belongs to Meekella' according to King 1931
  • 'Meekella grandis is a subjective synonym of Meekella occidentalis'
  • 'Meekella hessensis belongs to Meekella' according to King 1931
  • 'Meekella hessensis belongs to Meekella'
  • 'Meekella intermedia belongs to Meekella'
  • 'Meekella magnifica belongs to Meekella'
  • 'Meekella prionota belongs to Meekella'
  • 'Meekella skenoides belongs to Meekella' according to Girty 1909
  • 'Meekella skenoides belongs to Meekella'
  • 'Meekella texana belongs to Meekella'
  • 'Meekella texana belongs to Meekella' according to King 1931
  • 'Niviconia abrupta belongs to Niviconia'
  • 'Nothopindax egregius belongs to Nothopindax'
  • 'Ombonia invecta belongs to Ombonia'
  • 'Orthotetella wolfcampensis belongs to Orthotetella'
  • 'Orthotetes campanulatus is a subjective synonym of Geyerella americana'
  • 'Orthotetes campanulatus belongs to Orthotetes' according to Girty 1909
  • 'Orthotetes declivis belongs to Orthotetes' according to Girty 1909
  • 'Orthotetes declivis is a subjective synonym of Orthotetes guadalupensis'
  • 'Orthotetes distortus belongs to Orthotetes' according to Girty 1909
  • 'Orthotetes distortus is a subjective synonym of Geyerella americana'
  • 'Orthotetes guadalupensis belongs to Orthotetes' according to Girty 1909
  • 'Orthotetes guadalupensis is recombined as Ombonia guadalupensis'
  • 'Parakeyserlingina fredericksi is recombined as Eolyttonia fredericksi'
  • 'Paralyttonia girtyi is recombined as Rigbyella girtyi'
  • 'Petasmaia expansa belongs to Petasmaia'
  • 'Petrocrania diabloensis belongs to Petrocrania'
  • 'Petrocrania exasperata belongs to Petrocrania'
  • 'Petrocrania septifera belongs to Petrocrania'
  • 'Petrocrania teretis belongs to Petrocrania'
  • 'Poikilosakos informis belongs to Poikilosakos'
  • 'Pseudoleptodus annosus belongs to Pseudoleptodus'
  • 'Pseudoleptodus conicus belongs to Pseudoleptodus'
  • 'Pseudoleptodus cucullatus belongs to Pseudoleptodus'
  • 'Pseudoleptodus getawayensis belongs to Pseudoleptodus'
  • 'Pseudoleptodus giganteus belongs to Pseudoleptodus'
  • 'Pseudoleptodus grandis belongs to Pseudoleptodus'
  • 'Pseudoleptodus granulosus belongs to Pseudoleptodus'
  • 'Pseudoleptodus lepidus belongs to Pseudoleptodus'
  • 'Pseudoleptodus nodosus belongs to Pseudoleptodus'
  • 'Pseudoleptodus primitivus belongs to Pseudoleptodus'
  • 'Roemerella gigantissima belongs to Roemerella'
  • 'Sceletonia crassa belongs to Sceletonia'
  • 'Schuchertella permiana is recombined as Goniarina permiana'
  • 'Schuchertella subvexa belongs to Schuchertella'
  • 'Streptorhynchus gregarium belongs to Streptorhynchus' according to Girty 1909
  • 'Streptorhynchus gregarium is recombined as Tropidelasma gregarium'
  • 'Streptorhynchus lamellatum is recombined as Diplanus lamellatus'
  • 'Streptorhynchus occidentalis belongs to Streptorhynchus' according to Newberry 1861
  • 'Streptorhynchus occidentalis is recombined as Meekella occidentalis'
  • 'Streptorhynchus perattenuatum belongs to Streptorhynchus' according to Girty 1909
  • 'Streptorhynchus perattenuatum is recombined as Tropidelasma perattenuatum'
  • 'Streptorhynchus pygmaeum belongs to Streptorhynchus' according to Girty 1909
  • 'Streptorhynchus pygmaeum is recombined as Tropidelasma pygmaeum'
  • 'Streptorhynchus pyramidale is replaced by Chelononia straminea'
  • 'Streptorhynchus pyramidalis belongs to Streptorhynchus' according to Newberry 1861
  • 'Streptorhynchus pyramidalis is a subjective synonym of Meekella occidentalis'
  • 'Streptorhynchus undulatum belongs to Streptorhynchus' according to King 1931
  • 'Streptorhynchus undulatum is recombined as Tropidelasma undulatum'
  • 'Tropidelasma anthicum belongs to Tropidelasma'
  • 'Tropidelasma corniculum belongs to Tropidelasma'
  • 'Tropidelasma costellatum belongs to Tropidelasma'
  • 'Tropidelasma culmenatum belongs to Tropidelasma'
  • 'Tropidelasma curtum belongs to Tropidelasma'
  • 'Tropidelasma furcillatum belongs to Tropidelasma'
  • 'Tropidelasma rhamphodes belongs to Tropidelasma'
  • 'Tropidelasma robertsi belongs to Tropidelasma'
  • 'Tropidelasma strobilum belongs to Tropidelasma'