Opinions from O. E. Tetlie 2006
- 'Baltoeurypterus is a subjective synonym of Eurypterus'
- 'Baltoeurypterus henningsmoeni is recombined as Eurypterus henningsmoeni'
- 'Eurypteridae belongs to Eurypteroidea'
- 'Eurypterina belongs to Eurypterida'
- 'Eurypteroidea belongs to Eurypterina'
- 'Eurypterus belongs to Eurypteridae'
- 'Eurypterus cephalaspis belongs to Eurypterus' according to Salter 1856
- 'Eurypterus cephalaspis belongs to Eurypterus'
- 'Eurypterus dekayi belongs to Eurypterus'
- 'Eurypterus dekayi belongs to Eurypterus' according to Hall 1859
- 'Eurypterus flintstonensis belongs to Eurypterus' according to Swartz 1923
- 'Eurypterus flintstonensis belongs to Eurypterus'
- 'Eurypterus hankeni belongs to Eurypterus'
- 'Eurypterus laculatus belongs to Eurypterus' according to Kjellesvig-Waering 1958
- 'Eurypterus laculatus belongs to Eurypterus'
- 'Eurypterus lacustris belongs to Eurypterus' according to Harlan 1834
- 'Eurypterus lacustris belongs to Eurypterus'
- 'Eurypterus leopoldi belongs to Eurypterus'
- 'Eurypterus loi belongs to Eurypterus' according to Chang 1957
- 'Eurypterus loi belongs to Eurypterus'
- 'Eurypterus minor belongs to Eurypterus'
- 'Eurypterus ornatus belongs to Eurypterus' according to Leutze 1958
- 'Eurypterus ornatus belongs to Eurypterus'
- 'Eurypterus pittsfordensis belongs to Eurypterus' according to Sarle 1903
- 'Eurypterus pittsfordensis belongs to Eurypterus'
- 'Eurypterus pugio belongs to Eurypterus' according to Barrande 1872
- 'Eurypterus pugio is recombined as Phasganocaris pugio' according to Jones and Woodward 1888
- 'Eurypterus quebecensis belongs to Eurypterus'
- 'Eurypterus quebecensis belongs to Eurypterus' according to Kjellesvig-Waering 1958
- 'Eurypterus remipes belongs to Eurypterus'
- 'Eurypterus styliformis belongs to Eurypterus' according to Chang 1957
- 'Eurypterus styliformis belongs to Eurypterus'
- 'Eurypterus tetragonophthalmus belongs to Eurypterus' according to Fischer 1839
- 'Eurypterus tetragonophthalmus belongs to Eurypterus'
- 'Eurypterus yangi belongs to Eurypterus' according to Chang 1957
- 'Eurypterus yangi belongs to Eurypterus'
- 'Phasganocaris belongs to Phyllocarida' according to Jones and Woodward 1888
- 'Phasganocaris pugio serrata belongs to Phasganocaris pugio' according to Jones and Woodward 1888
- 'Phasganocaris pugio serrata is recombined as Eurypterus serratus'