Stamm Protarthropoda
Lankester 1904 
I.classis Onychophora
Grube 1853
Stamm Arthropoda Siebold
& Stannius 1845
Unterstamm Chelicerata
Heymons 1901
I.classis Merostoma
Dana 1852 = Poecilopoda
M'coy 
= Palaeostraca
Grobben
superordo
Xiphosura Latreille 1802
ordo Aglaspida Walcott
1911 
Aglaspis
ordo Xiphosurida
Latreille 1802
superordo
Eurypterida Burmeister 1843 Eurypterus
= Gigantostraca Haeckel 1896
II.classis Arachnida
Lamarck 1801
ordo Scorpionida
Latreille 1817 Scorpio
= Scorpiones Hemprich &Ehrenberg 1826 Scorpio
subordo Protoscorpionina
Petrunkevich 1949 
=Protoscorpiones
subordo Euscorpionina
Petrunkevich 1949 =Euscorpiones
ordo Pseudoscorpionida
Latreille 1817
ordo Phalangiida Pery
1833 Phalangium
= Opiliones Sunevall 1833
subordo Palpatorina
Thorell 1876 =Palpatores
subordo Laniatorina
Thorell 1876 =Laniatores
ordo Architarbida Petrunkevitch
1945
ordo Acarida Nitzsch
1818
ordo Haptopodida Pocock
1911
ordo Anthracomartida
Karsch 1882
ordo Trigonomatrida
Petrunkevich 1949
ordo Palpigradida
Thorell 1888
ordo Thelyphonida
Latreille 1804
ordo Schizomida
Petrunkevitch 1945
ordo Kustarachnida
Petrunkevitch 1913
ordo Phrynichida
Petrunkevich 1945
ordo Araneida Clerck
1757
subordo Liphistina
Pocock 1892
subordo Theraphosina
Sundevall 1830 =Theraphosa
subordo Dipneumonina
Latreille 1817 =Dipneumones
ordo Solpugida Leach
1815
ordo Ricinuleida Thorell
1892
Unterstamm Pycnogonida
Latreille 1810
ordo Pantopoda
Gerstaecker 1863
ordo Palaeopantopoda
Broili 1930
Unterstamm Trilobitomorpha
Stormer 1944 = Proarthropoda
Vandell 1949
I.classis Merostomoidea
Stormer 1944
II.classis Pseudonotostraca
[Pseudonostraca] Raymond 1935
= Pseudocrustacea Stormer 1944
III.classis Marellomorpha
Beurlen 1934
IV.classis Trilobita
Walch 1771
V.classis Arthropleurida
Waterlot 1934
Unterstamm Mandibulata
= Antennata