Heteroptera
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- o Signoret, 1858 Acrosternum Pentatomidae
- oahuensis Blackburn, 1888 Saldula Saldidae genit prep
- oberthuri Puton, 1875 Cyphodema Miridae
- oberti Kolenati, 1856 Stephanitis Tingidae
- obesa Stål, 1864 Trigonosoma Scutelleridae TYPUS
- obesula Wollaston, 1858 Wollastoniella Anthocoridae
- obesum Stål, 1865 Trigonosoma Scutelleridae TYPUS
- oblineatus Say, 1832 Lygus Miridae
- obliqua Hungerford & Matsuda, 1925 Hesperocorixa Corixidae PARATYPUS
- obliqua Osborn & Drake, 1916 Corythucha Tingidae
- obliqua Stål, 1873 Gargaphia Tingidae TYPUS
- obliqua Thunberg, 1787 Notonecta Notonectidae
- obliquatus Spinola, 1837 Heleocoris Naucoridae
- obliquefasciatus Lindberg, 1934 Adelphocoris Miridae TYPUS
- obliquus Costa, 1853 Xylocoris Anthocoridae
- obliquus Guérin, 1857 Symphylus Scutelleridae
- obliquus Herrich-Schaeffer, 1843 Dysdercus Pyrrhocoridae
- obliquus Horváth, 1888 Cymus Lygaeidae
- obliquus Uhler, 1872 Microporus Cydnidae
- oblonga Bergroth, 1892 Lobocara Aradidae TYPUS
- oblonga Fieber, 1851 Discocephala Pentatomidae
- oblonga Say, 1825 Leptopharsa Tingidae
- oblonga (Stål, 1862) Exptochiomera Lygaeidae LECTOTYPUS
- oblonga (Stål, 1858) Macrosaldula Saldidae TYPUS
- oblonga Westwood, 1837 Brachyaulax Scutelleridae
- oblongiceps Stål, 1865 Coranus Reduviidae TYPUS
- oblongipes Fabricius, 1803 Plectrocnemia Coreidae
- oblongulus Montandon, 1897 Ambrysus Naucoridae LECTOTYPUS
- oblongulus Montandon, 1909 Coptocatus Naucoridae
- oblongus Fabricius, 1803 Ischnodemus Lygaeidae
- oblongus Haglund, 1868 Demoleus Scutelleridae TYPUS
- oblongus Stål, 1865 Blissus Lygaeidae
- obnubila Lundblad, 1934 Potamometropsis Gerridae TYPUS
- obnubilus Distant, 1883 Ischnodemus Lygaeidae
- obscura Dallas, 1851 Deroplax Scutelleridae
- obscura Dallas, 1851 Urochela Urostylidae
- obscura Germar, 1837 Spathocera Coreidae
- obscura Herrich-Schaeffer, 1839 Brochymena Pentatomidae
- obscura Lepeletier & Serville, 1825 Cyclopelta Dinidoridae
- obscura McPherson & Sailer, 1978 Corimelaena Thyreocoridae
- obscura Montandon, 1906 Ranatra Nepidae
- obscura Provancher, 1872 Salda Saldidae
- obscura Stål, 1855 Acanthaspis Reduviidae TYPUS
- obscura Stål, 1866 Sirthenea Reduviidae TYPUS
- obscura Westwood, 1847 Eumenotes Dinidoridae
- obscura Westwood, 1842 Jadera Coreidae
- obscura White, 1842 Rhopalomorpha Acanthosomatidae
- obscura discolor Stål, 1860 Jadera Coreidae TYPUS
- obscura lateralis Stål, 1862 Jadera Coreidae TYPUS
- obscurator Fabricius, 1803 Margus Coreidae
- obscuratus Distant, 1883 Dysdercus Pyrrhocoridae
- obscuratus Montandon, 1897 Capaneus Coreidae
- obscuratus Montandon, 1895 Eremocoris Lygaeidae
- obscuratus Montandon, 1913 Naucoris Naucoridae TYPUS
- obscuratus (Poppius, 1910) Taylorilygus Miridae TYPUS
- obscuratus flavipennis Blöte, Dysdercus Pyrrhocoridae
- obscuratus garskei Schmidt, Dysdercus Pyrrhocoridae
- obscuratus incertus Distant, 1883 Dysdercus Pyrrhocoridae
- obscurella Zetterstedt, 1838 Scoloposcelis Anthocoridae
- obscurellus Fallén, 1829 Phoenicocoris Miridae
- obscuriceps (Stål, 1858) Plagiognathus Miridae TYPUS
- obscuricollis (Stål, 1858) Reduvius Reduviidae TYPUS
- obscuricornis Dallas, 1852 Acanthocoris Coreidae
- obscuricornis Poppius, 1910 Collaria Miridae TYPUS
- obscuricornis Stål, 1858 Bolbocoris Scutelleridae TYPUS
- obscuricornis Stål, 1860 Edessa Pentatomidae TYPUS
- obscuricornis Stål, 1871 Lybas Coreidae TYPUS
- obscuricornis (Stål, 1860) Nezara Pentatomidae TYPUS
- obscuricornis (Stål, 1855) Volumnus Miridae TYPUS
- obscuricornis (Stål, 1860) Zelurus Reduviidae TYPUS
- obscuricornis Westwood, 1842 Amorbus Coreidae
- obscuridorsis (Stål, 1860) Zelus Reduviidae LECTOTYPUS
- obscuripennis Stål, 1860 Edessa Pentatomidae TYPUS
- obscuripennis Stål, 1855 Haematochares Reduviidae TYPUS
- obscuripennis (Stål, 1874) Lygaeospilus Lygaeidae TYPUS
- obscuripennis Stål, 1854 Naucoris Naucoridae TYPUS
- obscuripennis (Stål, 1872) Zelurus Reduviidae TYPUS
- obscuripes Stål, 1871 Lybas Coreidae TYPUS
- obscuripes Stål, 1858 Phorticus Nabidae TYPUS
- obscuripes Stål, 1865 Vestula Reduviidae
- obscurus Cheng & Nieser, 1993 Metrocoris Gerridae PARATYPUS
- obscurus Dallas, 1851 Aednus Pentatomidae
- obscurus Dallas, 1851 Amyntor Pentatomidae
- obscurus Dallas, 1851 Dinocoris Pentatomidae
- obscurus Dallas, 1850 Isyndus Reduviidae
- obscurus Dallas, 1851 Moncus Pentatomidae
- obscurus Dallas, 1851 Podisus Pentatomidae
- obscurus Dallas, 1851 Polytes Scutelleridae
- obscurus Fabricius, 1794 Aspongopus Dinidoridae
- obscurus (Melin, 1928) Nerthra Gelastocoridae PARATYPUS
- obscurus Montandon, 1908 Limnocoris Naucoridae
- obscurus Montandon, 1894 Schizometopus Plataspidae SYNTYPUS
- obscurus Mulsant & Rey, 1852 Megalonotus Lygaeidae
- obscurus Polhemus & Champ, 1966 Hebrus Hebridae PARATYPUS
- obscurus Rambur, 1839 Strongylocoris Miridae
- obscurus Reuter, 1875 Orthotylus Miridae
- obscurus Stål, 1870 Cimolus Coreidae LECTOTYPUS
- obscurus Stål, 1870 Margus Coreidae LECTOTYPUS
- obscurus (Stål, 1854) Nerthra Gelastocoridae TYPUS
- obscurus Westwood, 1842 Nematopus Coreidae
- obsipata Germar, 1837 Atelocera Pentatomidae
- obsoleta Fieber, 1864 Asciodema Miridae
- obsoleta Stål, 1865 Orthoschizops Pentatomidae TYPUS
- obsoletus Dallas, 1851 Poecilocoris Scutelleridae
- obsoletus Klug, 1830 Oncocephalus Reduviidae
- obsoletus (Stål, 1860) Ochrostomus Lygaeidae TYPUS
- obstinatus (Stål, 1860) Acrosternum Pentatomidae LECTOTYPUS
- obsura Jeannel, 1919 Acanthaspis Reduviidae
- obtectus Fabricius, 1803 Canopus Thyreocoridae
- obtectus V s rhelyi, 1988 Aradus Aradidae
- obtusa Dallas, 1851 Edessa Pentatomidae
- obtusa Fieber, 1886 Aelia Pentatomidae
- obtusa Walker, Homalogonia Pentatomidae
- obtusangula Reuter, 1881 Carbula Pentatomidae PARATYPUS
- obtusangulus Stål, 1874 Holotrichus Reduviidae TYPUS
- obtusangulus Stål, 1865 Pododus Pentatomidae TYPUS
- obtusiceps Stål, 1871 Coptosoma Plataspidae TYPUS
- obtusiceps Stål, 1872 Dryptocephala Pentatomidae TYPUS
- obtusicornis Stål, 1872 Proxys Pentatomidae TYPUS
- obtusispina Stål, 1871 Sastragala Acanthosomatidae TYPUS
- obtusus Brullé, 1839 Ceraleptus Coreidae
- obtusus Dallas, 1851 Symphylus Scutelleridae
- obtusus de Beauvois, 1805 Rhynocoris Reduviidae
- obtusus Haglund, 1894 Probaenops Plataspidae TYPUS
- obtusus Mulsant & Rey, 1865 Sternodontus Scutelleridae
- obtusus Reuter, 1881 Stictocarenus Acanthosomatidae TYPUS
- obtusus Walker, 1867 Picromerus Pentatomidae
- occidentalis La Rivers, 1951 Ambrysus Naucoridae PARATYPUS
- occidentalis Lindberg, 1958 Cymoninus Lygaeidae PARATYPUS
- occidentalis Wagner, 1954 Eurystylus Miridae PARATYPUS
- occipitalis Breddin, 1905 Anisops Notonectidae
- occulata Lundblad, 1929 Hesperocorixa Corixidae PARATYPUS
- occulcata Drake, Rhagovelia Veliidae PARATYPUS
- occultus Lundblad, 1934 Laccotrephes Nepidae TYPUS
- oceanica Distant, 1909 Microvelia Veliidae
- oceanicus Distant, 1901 Dieuches Lygaeidae
- oceanicus Signoret, 1881 Geotomus Cydnidae
- ocellatus Klug, 1834 Sphaerocoris Scutelleridae
- ocellatus Reuter, 1876 Sericophanes Miridae
- ocellatus Thunberg, 1784 Cantao Scutelleridae
- ochracea Stål, 1855 Acanthaspis Reduviidae TYPUS
- ochraceus Fieber, 1861 Sciocoris Pentatomidae
- ochraceus Herrich-Schaeffer, 1842 Cletus Coreidae
- ochraceus Montandon, 1909 Ambrysus Naucoridae TYPUS
- ochraceus (Stål, MS-name?) Reduvius Reduviidae TYPUS?
- ochreus Westwood, 1837 Aspongopus Dinidoridae saknas
- ochripennis Jeannel, 1916 Cleptocoris Reduviidae
- ochripennis (Stål, 1854) Zelurus Reduviidae TYPUS
- ochripes Stål, 1854 Coenomorpha Pentatomidae TYPUS
- ochripes (Stål, 1855) Ischnodemus Lygaeidae TYPUS
- ochripes (Stål, 1855) Lestomerus Reduviidae TYPUS
- ochripes Stål, 1855 Reduvius Reduviidae TYPUS
- ochripes (Stål, 1855) Vatinius Reduviidae TYPUS
- ochroceras (Stål, 1860) Pachybrachius Lygaeidae LECTOTYPUS
- ochrocyanea Lepeletier & Serville, 1825 Discocera Pentatomidae
- ochroleuca Fieber, 1870 Cymophyes Lygaeidae
- ochroleucus Kirschbaum, 1856 Megalocoleus Miridae
- ochroleucus Miller, 1958 Pristhesancus Reduviidae TYPUS
- ochropa (Stål, 1860) Leptodictya Tingidae TYPUS
- ochropterus Fieber, 1844 Geocoris Lygaeidae
- ochropterus Stål, 1867 Apiomerus Reduviidae LECTOTYPUS
- ochropterus Stål, 1867 Ectomocoris Reduviidae TYPUS
- ochropterus (Stål, 1860) Thymetus Coreidae LECTOTYPUS
- ochropus Stål, 1865 Ischnodemus Lygaeidae TYPUS
- ochropus (Stål, 1855) Leogorrus Reduviidae LECTOTYPUS
- ochropus Stål, 1955 Lestomerus Reduviidae TYPUS
- ochropus Stål, 1855 Reduvius Reduviidae TYPUS
- ochropus Stål, 1855 Vatinius Reduviidae TYPUS
- octoguttata Reuter, 1890 Nabis Nabidae TYPUS
- octoguttata Reuter, MS-name? Nabis Nabidae TYPUS?
- octonotata Bergroth, 1914 Remaudiereana Lygaeidae PARATYPUS
- octopunctatus Dallas, 1849 Prionochilus Pentatomidae
- octospinosa Fabricius, 1803 Heza Reduviidae
- ocularis Mulsant & Rey, 1852 Psallus Miridae
- oculata Fabricius, 1775 Dalpada Pentatomidae
- oculata (Reuter, 1876) Collaria Miridae TYPUS
- oculata Stål, 1865 Cleptria Reduviidae TYPUS
- oculata Wagner, 1954 Tuponia Miridae PARATYPUS
- oculatus Fabricius, 1798 Gelastocoris Gelastocoridae
- oculatus Lindberg, ? Adelphocoris Miridae
- oculatus (Montandon, 1896) Lethocerus Belostomatidae TYPUS
- oculatus Reuter, 1904 Deraeocoris Miridae
- oculatus Stål, 1874 Crompus Lygaeidae TYPUS
- oculatus Stål, 1865 Vitumnus Reduviidae
- oculatus variegatus Guérin-Méneville, 1844 Gelastocoris Gelastocoridae
- odiosus Stål, 1862 Capaneus Coreidae TYPUS
- odontogaster Zetterstedt, 1828 Gerris Gerridae
- odontogaster brevispinus Lundblad, 1934 Gerris Gerridae ALLOTYPUS
- odontospermi Lindberg, 1958 Campylomma Miridae PARATYPUS
- odontostoma (Stål, 1873) Lasiacantha Tingidae TYPUS
- oedancalodes Stål, 1874 Pachygrontha Lygaeidae TYPUS
- offuscata Breddin, 1907 Edessa Pentatomidae
- ohlini (Haglund, 1899) Bergidea Lygaeidae TYPUS
- olcesei Fairmaire, 1885 Leprosoma Scutelleridae
- oleosa Distant, 1883 Collaria Miridae
- oleracea Linnaeus, 1758 Eurydema Pentatomidae
- oleus Horváth, 1915 Bromocoris Pentatomidae
- olivacea Stål, 1862 Edessa Pentatomidae TYPUS
- olivacecus Reuter, 1907 Dagbertus Miridae
- olivaceus Fabricius, 1777 Deraeocoris Miridae
- olivieri Puton, 1873 Catoplatus Tingidae
- omani Barber, 1937 Blissus Lygaeidae PARATYPUS
- omani Todd, 1955 Nerthra Gelastocoridae
- onustus Fieber, 1861 Atomoscelis Miridae
- opaca Champion, 1897 Amblystira Tingidae
- opacipennis Lindberg, 1934 Calocoris Miridae TYPUS
- opaconotum Lindberg, 1953 Megalonotus Lygaeidae
- opacula Zetterstedt, 1838 Saldula Saldidae
- opacus Champion, Gerris Gerridae
- opacus Scudder, 1958 Crompus Lygaeidae
- opacus (Stål, 1854) Macroscytus Cydnidae TYPUS
- opacus Uhler, 1860 Pachycephalus Coreidae
- opacus Walker, 1873 Neocapsus Miridae
- opacus Zetterstedt, 1838 Chlamydatus Miridae
- ophthalmica Stål, 1863 Hypencha Pentatomidae TYPUS
- ophthalmicus Burmeister, 1835 Ectatops Pyrrhocoridae
- opercularis Signoret,1883 Dearcla Cydnidae
- opiparia Drake & Hottes, 1955 Saldula Saldidae
- oppositus Say, 1832 Leptoglossus Coreidae
- opsimus Elkins, 1954 Atopozelus Reduviidae PARATYPUS
- oratorius Fabricius, 1803 Leptocorisa Alydidae
- oratorius trinotata Herrich-Schaeffer, 1848 Leptocorisa Alydidae
- orba (Stål, 1860) Aquarius Gerridae TYPUS
- orbicularis Burmeister, 1835 Pododus Pentatomidae
- orbiculata Uhler, 1877 Saldula Saldidae
- orbus Stål, 1860 Cryptorhamphus Lygaeidae TYPUS
- orbuz (Stål, 1854) Nezara Pentatomidae TYPUS
- oriander Porskley, 1922 Rhagovelia Veliidae
- orientalis Distant, 1904 Rhyparothesus Lygaeidae
- orientalis Horwath, 1881 Campylosteira Tingidae
- orientalis Kirkaldy, Mesovelia Mesoveliidae
- orientalis Lundblad, 1933 Hydrometra Hydrometridae ALLOTYPUS
- orientalis Schouteden, 1912 Cletus Coreidae TYPUS
- orientalis Schouteden, 1910 Coptosoma Plataspidae TYPUS
- orientalis Schouteden, 1910 Dysdercus Pyrrhocoridae
- orientalis pulchra Schouteden, 1910 Dysdercus Pyrrhocoridae TYPUS
- origani Kolenati, 1845 Metopoplax Lygaeidae
- ornata Linnaeus, 1758 Eurydema Pentatomidae
- ornata Maladonado, 1976 Heza Reduviidae PARATYPUS
- ornata Stål, 1871 Cyclopelta Dinidoridae TYPUS
- ornata Stål, 1860 Mormidea Pentatomidae TYPUS
- ornata Stål, 1865 Phthia Coreidae HOLOTYPUS
- ornata Thunberg, 1822 Mardania Reduviidae
- ornatella Stål, 1855 Compseuta Tingidae TYPUS
- ornatellus Distant, 1903 Rhynocoris Reduviidae
- ornaticeps (Stål, 1858) Megalotomus Alydidae TYPUS
- ornaticeps (Stål, 1860) Pselliopus Reduviidae TYPUS
- ornaticollis (Stål, 1862) Platytylus Miridae TYPUS
- ornatula Herrich-Schaeffer, 1853 Chroantha Pentatomidae
- ornatula (Reuter, 1881) Micracanthia Saldidae TYPUS
- ornatulus (Stål, 1862) Poecilocapsus Miridae TYPUS
- ornatus Dallas, 1851 Chrysocoris Scutelleridae
- ornatus Dallas, 1851 Poecilocoris Scutelleridae
- ornatus Dallas, 1854 Stiretrus Pentatomidae
- ornatus Distant, 1903 Artemidorus Lygaeidae
- ornatus Germar, 1837 Graptocoris Scutelleridae
- ornatus Kirkaldy, 1908 Neostethus Lygaeidae
- ornatus (Reuter, 1876) Reuteroscopus Miridae TYPUS
- ornatus Sailer, 1944 Oebalus Pentatomidae PARATYPUS
- ornatus (Stål, 1863) Ectomocoris Reduviidae TYPUS
- orthochila Fieber, 1859 Saldula Saldidae
- ortonedai Montandon, 1897 Spartocera Coreidae
- ostensum Distant, Coptosoma Plataspidae
- ostentans (Stål, 1855) Deraeocoris Miridae TYPUS
- ostentans nigricollis (Poppius, 1910) Deraeocoris Miridae TYPUS
- ostentans obscuricollis (Poppius, 1910) Deraeocoris Miridae TYPUS
- ostraciopterus Montrouzier, 1845 Oncomeris Pentatomidae
- ourayi Drake & Hottes, 1949 Saldula Saldidae
- ovalis Barber, 1953 Kleidocerys Lygaeidae
- ovalis Dallas, 1852 Ozophora Lygaeidae
- ovalis Hussey, 1925 Corimelaena Thyreocoridae
- ovalis Stål, 1865 Bathycoelia Pentatomidae TYPUS
- ovata Bergroth, 1892 Lobocara Aradidae TYPUS
- ovata Champion, 1897 Phatnoma Tingidae
- ovata Karsch, 1892 Patanocnema Dinidoridae
- ovatulus (Costa, 1853) Hyalochilus Lygaeidae
- ovatus Stål, 1862 Abedus Belostomatidae LECTOTYPUS
- ovatus Stål, 1862 Neuroctenus Aradidae
- ovina Dallas, 1851 Edessa Pentatomidae
- oxiana Jansson, 1983 Subsigara Corixidae
- oxycedri Lindberg, ? Dichrooscytus Miridae TYPUS
- oxycedri Lindberg, MS-name? Dichrooscytis Miridae TYPUS?
- oxyura Dufour, 1863 Belostoma Belostomatidae