Opinions from B. J. Mader 1989

  • 'Allops is a subjective synonym of Menops'
  • 'Allops crassicornis is recombined as Menops crassicornis'
  • 'Allops serotinus is recombined as Menops serotinus'
  • 'Allops walcotti is recombined as Menops walcotti'
  • 'Anisacodon montanus is a nomen dubium'
  • 'Brontops belongs to Brontotheridae'
  • 'Brontops dispar belongs to Brontops'
  • 'Brontops robustus belongs to Brontops'
  • 'Brontops validus is a subjective synonym of Brontops dispar'
  • 'Brontotherium is a nomen dubium'
  • 'Brontotherium gigas is a nomen dubium'
  • 'Brontotherium hatcheri is recombined as Megacerops hatcheri'
  • 'Brontotherium ingens is a nomen dubium'
  • 'Brontotherium leidyi is a nomen dubium'
  • 'Diconodon is a nomen dubium'
  • 'Diplacodon emarginatus is recombined as Protitanotherium emarginatum'
  • 'Diploceras is a subjective synonym of Eotitanotherium'
  • 'Diploceras osborni is recombined as Eotitanotherium osborni'
  • 'Diploclonus is a subjective synonym of Brontops'
  • 'Diploclonus amplus is recombined as Brontops amplus'
  • 'Eometarhinus is a subjective synonym of Palaeosyops'
  • 'Eotitanops belongs to Brontotheridae'
  • 'Eotitanops is a subjective synonym of Palaeosyops' according to Wallace 1980
  • 'Eotitanops belongs to Brontotheridae' according to Osborn 1907
  • 'Eotitanops gregoryi is a subjective synonym of Eotitanops borealis'
  • 'Eotitanops minimus is a subjective synonym of Eotitanops gregoryi'
  • 'Eotitanotherium belongs to Brontotheridae'
  • 'Eotitanotherium is a subjective synonym of Diplacodon' according to Lucas 1983
  • 'Leurocephalus is a subjective synonym of Telmatherium'
  • 'Leurocephalus cultridens is recombined as Telmatherium cultridens'
  • 'Limnohyops is a subjective synonym of Palaeosyops' according to Earle 1895
  • 'Limnohyops is a subjective synonym of Palaeosyops'
  • 'Limnohyops priscus is recombined as Palaeosyops priscus'
  • 'Limnohyus is a subjective synonym of Palaeosyops'
  • 'Limnohyus laevidens belongs to Limnohyus'
  • 'Limnohyus laticeps is recombined as Palaeosyops laticeps'
  • 'Limnohyus laticeps is recombined as Palaeosyops laticeps' according to Matthew 1899
  • 'Limnohyus laticeps is recombined as Palaeosyops laticeps' according to Matthew 1897
  • 'Limnohyus laticeps is recombined as Palaeosyops laticeps' according to Earle 1895
  • 'Manteoceras is a subjective synonym of Telmatherium'
  • 'Manteoceras foris is recombined as Telmatherium foris'
  • 'Manteoceras foris belongs to Manteoceras' according to Cook 1926
  • 'Manteoceras pratensis is recombined as Telmatherium pratensis'
  • 'Manteoceras pratensis belongs to Manteoceras' according to Cook 1926
  • 'Manteoceras uintensis is a subjective synonym of Metatelmatherium ultimum'
  • 'Manteoceras washakiensis is recombined as Telmatherium washakiensis'
  • 'Megaceratops is a subjective synonym of Megacerops'
  • 'Megaceratops acer is recombined as Megacerops acer'
  • 'Megaceratops heloceras is recombined as Menops heloceras'
  • 'Megacerops belongs to Brontotheridae'
  • 'Megacerops assiniboiensis is a nomen dubium'
  • 'Megacerops bicornutus is recombined as Brontops bicornutus'
  • 'Megacerops marshi is recombined as Menops marshi'
  • 'Megacerops riggsi is a nomen dubium'
  • 'Megacerops tyleri is recombined as Brontops tyleri'
  • 'Menodus bakeri is recombined as Menops bakeri'
  • 'Menodus dolichoceras is a nomen dubium'
  • 'Menodus peltoceras is a subjective synonym of Megacerops curtus'
  • 'Menodus selwynianus is recombined as Brontops selwynianus'
  • 'Menodus tichoceras is a nomen dubium'
  • 'Menops belongs to Brontotheridae'
  • 'Menops varians belongs to Menops'
  • 'Palaeosyops borealis is recombined as Eotitanops borealis'
  • 'Palaeosyops borealis is recombined as Eotitanops borealis' according to West 1973
  • 'Palaeosyops borealis is recombined as Eotitanops borealis' according to Robinson 1966
  • 'Palaeosyops hyognathus is recombined as Dolichorhinus hyognathus'
  • 'Palaeosyops manteoceras is recombined as Manteoceras manteoceras' according to Hay 1902
  • 'Palaeosyops manteoceras is a nomen nudum'
  • 'Palaeosyops megarhinus is recombined as Mesatirhinus megarhinus'
  • 'Palaeosyops vallidens is recombined as Telmatherium vallidens'
  • 'Menodus is a nomen dubium'
  • 'Palaeotherium (Menodus) was reranked as Menodus and belongs to ' according to Cope 1886
  • 'Palaeotherium giganteum is a nomen dubium'
  • 'Palaeotherium proutii is a nomen dubium'
  • 'Protitanotherium belongs to Brontotheridae'
  • 'Protitanotherium is a subjective synonym of Diplacodon' according to Lucas 1983
  • 'Sthenodectes australis belongs to Sthenodectes' according to J. Wilson 1977
  • 'Symborodon is a nomen dubium'
  • 'Symborodon altirostris is a subjective synonym of Megacerops acer'
  • 'Symborodon bucco is a nomen dubium'
  • 'Symborodon copei is a nomen dubium'
  • 'Symborodon hypoceras is a nomen dubium'
  • 'Symborodon torvus is a nomen dubium'
  • 'Symborodon trigonoceras is recombined as Menops trigonoceras'
  • 'Teleodus uintensis is recombined as Duchesneodus uintensis'
  • 'Telmatotherium is a subjective synonym of Telmatherium'
  • 'Telmatherium incisivum is recombined as Sthenodectes incisivum'
  • 'Telmatherium ultimum is recombined as Metatelmatherium ultimum'
  • 'Telmatotherium cornutum is recombined as Dolichorhinus cornutum'
  • 'Telmatotherium diploconum is recombined as Rhadinorhinus diploconum'
  • 'Titanops is a subjective synonym of Megacerops'
  • 'Titanops curtus is recombined as Megacerops curtus'
  • 'Titanops elatus is recombined as Megacerops elatus'
  • 'Titanops medius is a nomen dubium'
  • 'Titanotheriidae is a subjective synonym of Brontotheridae'
  • 'Titanotherium is a nomen dubium'