Ochterus/fg
[f: Reuter 1910;
g: Latreille 1807 (synn.obj.: Pelogonus
Latreille 1809; Ochtherus Agassis 1846)]
Gelastocoris/f1=Ochterus/g1
= 
Litoralia
Fieber 1851
Ochterus/f1=g2
=
Brevicornes Amyot & Serville 1843
Oestrus/fg
[f: Oestrides Leach 1817]
g: Linnaeus 1758: 584,
typus O. ovis*
(design. Curtis 1826,
ICZN Opinion 106, 1929)].
Taxa above Diptera:
[Musca/f=Phryganea/g]
=
Trichopteroidea Chen
1946
Musca/f=Panorpa/g~
(incl. Pulex) =
Antliophorida Weaver 1984
Musca/f=Panorpa/g~
(sine Pulex) =
Antliophora Hennig 1969
[Musca/f=Oestrus/g] (incl. Pediculus, Acarus) = Antliata Fabricius 1775
[Musca/f=Oestrus/g]
(incl. Xenos) =
Bipennia Latreille 1825
= Halteria Whiting & Carpenter & Wheeler & Wheeler
1977
Musca/f=Oestrus/g~
(incl. Pulex) =
Dipteroidea Escherich 1914 =
Haustellodea Boudreaux 1979
[Musca/f=Oestrus/g] (sine Tipula; incl. Xenos) = Dermata Newman 1834
Taxa of Diptera:
Musca/f1=Oestrus/g1
(incl. Tipula) =
Diptera Linnaeus
1758 = Halterata Scopoli 1763 = Halteriptera
Clairville 1798 = Antliognatha Spinola
1850
Musca/f=Oestrus/g~
(sine Tipula; incl. Bibio) =
Neodiptera Michelson 1996 (in Kristensen 1995)
Musca/f2=Oestrus/g2
(sine Tipula, Bibio; incl. Tabanus) =
Brachocera Macquart 1834
Musca/f=Oestrus/g~
(sine Tabanus; incl. Empis) =
Eremoneura Lameere 1907
Musca/f3=Oestrus/g3
(sine Tabanus, Empis; incl. Syrphus) =
Cyclorapha Brauer 1863
= Cyclorhapha Schiner
1864 = Cyclorrhapha
Sharp 1894
Musca/f4=Oestrus/g4
(sine Lonchoptera; incl. Syrphus) =
Atriata Meijere 1900
Musca/f=Oestrus/g~ (sine Chaoborus) = Discota Weismann 1866
Musca/f=Oestrus/g~ (sine Syrphus; incl. Phora) = Dichoetae Macquart 1835
Musca/f5=Oestrus/g5
(sine Syrphus; incl. Conops) =
Schizophora Becher 1882
[Musca/f=Oestrus/g] (sine Syrphus, Hippobosca; incl. Conops) = Eumyidae Brauer 1869
Musca/f=Oestrus/g~ (sine Conops) = ?Calypteratae Robineau-Desvoidy 1830
Musca/f=Oestrus/g~ = Calypterae
[Musca/f=Oestrus/g] (sine Hippobosca; incl. Tipula) = Proboscidea Latreille 1809
[Musca/f=Oestrus/g] (sine Tipula, Phora, Hippobosca, Nycteribia) = Brachycera Schiner 1862
[Musca/f=Oestrus/g] (sine Tipula, Tabanus, Phora, Hippobosca, Nycteribia) = Orthocera Schiner 1864
[Musca/f=Oestrus/g] (sine Tipula, Tabanus, Phora, Hippobosca, Nycteribia, Syrpus, Conops) = Oligoneura Schiner 1864
[Musca/f=Oestrus/g] (sine Tipula, Tabanus, Phora, Braula, Hippobosca, Nycteribia) = Eudiptera Crampton 1916
[Musca/f=Oestrus/g]
(sine Tipula, Tabanus, Stratiomys; incl. Bibio)
=
Arescata Oldroyd 1977
[Musca/f=Oestrus/g] (sine Braula, Nycteribia; incl. Hippobosca, Syrphus) = Myiomorpha Rohdendorf 1961
Oestrus/fg~ (sine Tachina; incl. Hypoderma, Gasterophylus) = Astoma Dumeril 1806
Olenellus/fg
[f: Vogdes 1893:
g: Hall 1862]
Mesonacis/f=Olenellus/g = Metaparia Raw
Olenus/fg
[f: Burmeister 1843;
g: Dalman 1827]
Olenus/fg~ (incl. Triarthrus) = Archiaspida Haeckel 1896 = Archiaspides Haeckel 1896 = Protrilobita Haeckel 1896
Oligoneuria/fg
[f: Oligoneuriidae Ulmer 1914: 97;
g: Pictet 1843: 288,
typus O. anomala*]
[Heptagenia/f=Oligoneuria/g]
(sine Pseudiron) =
Setisura McCafferty 1991
Heptagenia/f1=Oligoneuria/g1
=
Branchitergaliae Kluge 1998
Oligoneuria/f1=g2
(incl. Isonychia) =
Eusetisura Kluge 1998
Oligoneuria/f2=g3
(sine Isonychia; incl. Chromarcys) =
Discoglossata
Kluge 2004
Oligoneuria/f3=g4
(sine Chromarcys) =
Geminovenata Kluge
2004
Omophron/fg
[f: Omophronidae Kirby 1837;
g: Latreille 1802]
Omophron/fg1 = Amphidephaga Kolbe 1880
Oniscus/fg
[f: Oniscoides Laicharting
1781(#10);
g:
Linnaeus 1758: 636,
typus O. asellus*
(design. Stiles 1928,
ICZN Opinion 104, 1928
& Direction 88, 1958)]
[Oniscus/fg] (incl. Scolopendra, Julus) = Mitosata Fabricius 1793 = Myriapodes Latreille 1796 = Polytoma Billberg 1820
[Oniscus/fg] = Polygonata Fabricius 1799
[Oniscus/fg] (incl. Gammarus, Lernaea, Caligus) = Tetradecapoda Blainville 1816
Oniscus/fg1
(incl. Gammarus, Mysis) =
Peracarida
Calman 1904
Oniscus/fg~
(sine Mysis; incl. Gammarus) =
Edriophthalma Leach
1815
= Edriophthalmata = Hedriophthalma
= Hedriophthalmata
Oniscus/fg2
(sine Gammarus, Mysis; incl. Asellus) = Tetracera Latreille 1802
=
Isopoda
Latreille 1817
Oniscus/fg2 (sine Caprella, Apseudes; incl. Asellus) = Pterygibranches Latrelle 1817 = Pterygobranchia Goldfuss 1820
Oniscus/fg~ (sine Anthura; incl. Cimothoa, Sphaeroma, Idothea, Asellus) = Euisopoda Claus 1872
Oniscus/fg~ (incl. Cimothoa, Sphaeroma, Idothea, Asellus) = Normalia Latreille 1831
Oniscus/fg~ (sine Cymothoa; incl. Asellus) = Ambulatoria Gerstaecker 1863 = Gressoria Sars 1867
Oniscus/fg3 (sine Asellus) = Polygnatha Dumeril 1806 = Quadricornes Dumeril 1806 = Terrestria Latreille 1825
Oniscigaster/fg
[f: Oniscigastrina Lameere 1917: 62;
g: McLachlan 1873: 109,
typus O. wakefieldi*]
Oniscigaster/fg1
=
Vetulata McCafferty 1991
Onychodictyon/fg
[f: Hou & Bergstrom 1995;
g: Hou, Ramskold & Bergstrom 1991]
Onychodictyon/fg1 =
Paronychophora
Hou & Bergstrom 1995
Opabania/g
[g: Walcott 1912]
Opabania/g1
=
Palaeanostraca Hutchinson
1930 = Dicephalosomita Sharov 1966
Opilio/fg
[f: Koch 1839;
g: Herbst 1798, typus Phalangium
parietinum De Geer 1778 (design. Simon 1879)]
see: Phalangium/fg (incl. Opilio)
Opilioacarus/fg
[fg: With 1902]
Opilioacarus/fg1 = Notostigmata With 1903-1904 =?Onychopalpida Wharton 1947
Orthezia/fg
[f: Orthezides Amyot & Serville 1843;
g: Bosc 1784,
typus Aphis urticae Linnaeus 1758
(= Orthezia characias*)]
Orthezia/fg~ =
Laninsecta
Amyot
& Serville 1843
Orthezia/fg1
(incl. Margarodes, Phenacoleachia) =
Paleococcoidea
Borchsenius 1950 = Archaeococcidea Bodenheimer
1952 = Paleococcomorpha Borchsenius 1965
Orussus/fg
[f: Oryssites Newman 1834;
g: Latreille 1796; syn.obj.: Oryssus Fabricius 1798]
Orussus/fg1
=
Idiogastra Rohwer & Cushman 1917
= Protoparasitica Engel
2005
[Oryssus/fg]
[g: Latreille 1796]
see: syn.obj. Orussus/fg