Opinions from G. H. Girty 1910

  • 'Amphissites rugosus belongs to Amphissites'
  • 'Anomphalus discus belongs to Anomphalus'
  • 'Aviculopecten inspeciosus belongs to Aviculopecten'
  • 'Aviculopecten jennyi belongs to Aviculopecten'
  • 'Aviculopecten morrowensis belongs to Aviculopecten'
  • 'Aviculopecten multilineatus belongs to Aviculopecten'
  • 'Aviculopecten squamula belongs to Aviculopecten'
  • 'Bairdia attenuata belongs to Bairdia'
  • 'Bairdia cestriensis belongs to Bairdia' according to E.O. Ulrich 1891
  • 'Bairdia cestriensis granulosa belongs to Bairdia cestriensis'
  • 'Bembexia lativittata belongs to Bembexia'
  • 'Caneyella peculiaris belongs to Caneyella'
  • 'Cardiomorpha inflata belongs to Cardiomorpha'
  • 'Conocardium peculiare belongs to Conocardium'
  • 'Cypricardella subalata belongs to Cypricardella'
  • 'Cypricardinia fayettevillensis belongs to Cypricardinia'
  • 'Edmondia equilateralis belongs to Edmondia'
  • 'Euconospira disjuncta belongs to Euconospira'
  • 'Glyptopleura belongs to Glyptopleuridae'
  • 'Glyptopleura angulata belongs to Glyptopleura'
  • 'Glyptopleura inopinata belongs to Glyptopleura'
  • 'Glyptopleuridae belongs to Palaeocopida'
  • 'Griffithides mucronatus belongs to Griffithides'
  • 'Halliella retiferiformis belongs to Halliella'
  • 'Kirkbya lindahli belongs to Kirkbya' according to E.O. Ulrich 1891
  • 'Kirkbya lindahli arkansana belongs to Kirkbya lindahli'
  • 'Kirkbya reflexa belongs to Kirkbya'
  • 'Kirkbya simplex belongs to Kirkbya'
  • 'Leda stevensiana belongs to Leda'
  • 'Leperditia nicklesi belongs to Leperditia' according to E.O. Ulrich 1891
  • 'Leperditia nicklesi is recombined as Paraparchites nicklesi'
  • 'Menophyllum excavatum belongs to Menophyllum'
  • 'Menophyllum excavatum arkansanum belongs to Menophyllum excavatum'
  • 'Michelinia meekana belongs to Michelinia'
  • 'Orthonychia compressa belongs to Orthonychia'
  • 'Oxydiscus venata belongs to Oxydiscus'
  • 'Palaeacis carinata belongs to Palaeacis'
  • 'Palaeoneilo sera belongs to Palaeoneilo'
  • 'Paraparchites nicklesi cyclopeus belongs to Paraparchites nicklesi'
  • 'Patellostium laevigatum belongs to Patellostium'
  • 'Platyceras subelegans belongs to Platyceras'
  • 'Primitia fayettevillensis belongs to Primitia'
  • 'Primitia seminalis belongs to Primitia'
  • 'Sanguinolites simulans belongs to Sanguinolites'
  • 'Solenopsis nitida belongs to Solenopsis'
  • 'Sphenotus branneri belongs to Sphenotus'
  • 'Sphenotus dubius belongs to Sphenotus'
  • 'Sphenotus meslerianum belongs to Sphenotus'
  • 'Sphenotus washingtonense belongs to Sphenotus'