Nejednakokrilci (lat. Anisoptera) su infrared kukaca, koji pripadaju redu Odonata. Dobili su naziv od grčkih riječi ἄνισος -anisos, „nejednak” i πτερόν pteron, „krilo”, jer su njihova zadnja krila šira od njihovih prednjih krila.
230px|mini|lijevo|Jantarni strijelac (Sympetrum flaveolum) Odrasle nejednakokrilce karakteriziraju velike, kompozitne oči, dva para jakih, prozirnih krila, ponekad s obojenim mrljama i izduženo tijelo. Nejednakokrilci slično izgledaju kao pripadnici srodne grupe Zygoptera, čiji pripadnici imaju slične strukture, iako su obično lakše građeni. Krila većine nejednakokrilaca drže se ravno i udaljena su od tijela, dok su kod Zygoptera krila sklopljena u mirovanju, duž ili iznad trbuha. Nejednakokrilci su okretni letači, dok Zygoptera imaju slabiji, lepršav let. Mnoge vrste nejednakokrilaca imaju brilijantne metalne boje, koje daju strukturna obojenja, što ih čini uočljivim u letu. Svako kompozitno oko odrasle jedinke ima skoro 24,000 ommatidija.
Sistematika Rodovi Aeschnosoma Selys, 1870 Aeshna Fabricius, 1775 Agriogomphus Selys, 1869 Allopetalia Selys, 1873 Anatya Kirby, 1889 Anax Leach, 1815 Andaeschna De Marmels, 1994 Anomalophlebia Belle, 1995 Antidythemis Kirby, 1889 Aphylla Selys, 1854 Archaeogomphus Williamson, 1919 Argyrothemis Ris, 1909 Arigomphus Needham, 1897 Basiaeschna Selys, 1883 Boyeria McLachlan, 1895 Brachymesia Kirby, 1889 Brasiliogomphus Belle, 1995 Brechmorhoga Kirby, 1894 Cacoides Cowley, 1934 Cannaphila Kirby, 1889 Castoraeschna Calvert, 1952 Celithemis Hagen, 1861 Cordulegaster Leach, 1815 Cordulia Leach, 1815 Coryphaeschna Williamson, 1903 Crocothemis Brauer, 1868 Cyanogomphus Selys, 1873 Dasythemis Karsch, 1889 Deielia Kirby, 1889 Desmogomphus Williamson, 1920 Diaphlebia Selys, 1854 Diastatops Rambur, 1842 Didymops Rambur, 1842 Dorocordulia Needham, 1901 Dromogomphus Selys, 1854 Dythemis Hagen, 1861 Edonis Needham, 1905 Elasmothemis Westfall, 1988 Elga Ris, 1909 Epiaeschna Hagen, 1877 Epigomphus Hagen in Selys, 1854 Epitheca Burmeister, 1839 Erpetogomphus Selys, 1858 Erythemis Hagen, 1861 Erythrodiplax Brauer, 1868 Fylgia Kirby, 1889 Gomphaeschna Selys, 1871 Gomphoides Selys, 1854 Gomphomacromia Brauer, 1864 Gomphus Leach, 1815 Gynacantha Rambur, 1842 Gynothemis Calvert in Ris, 1909 Hagenius Selys, 1854 Helocordulia Needham, 1901 Hypopetalia McLachlan, 1870 Idiataphe Cowley, 1934 Idiogomphoides Belle, 1984 Ladona Needham, 1899 Lanthus Needham, 1897 Lauromacromia Geijskes, 1970 Leucorrhinia Brittinger, 1850 Libellula Linnaeus, 1758 Limnetron Förster, 1907 Macrodiplax Brauer, 1868 Macromia Rambur, 1842 Macrothemis Hagen, 1868 Melanocacus Belle, 1986 Miathyria Kirby, 1889 Micrathyria Kirby, 1889 Misagria Kirby, 1889 Mitragomphus Needham, 1944 Nannothemis Brauer, 1868 Nasiaeschna Selys in Förster, 1900 Navicordulia Machado and Costa, 1995 Neocordulia Selys, 1882 Neogomphus Selys, 1858 Neopetalia Cowley, 1934 Nephepeltia Kirby, 1889 Nesogonia Kirby, 1898 Neuraeschna Hagen, 1867 Neurocordulia Selys, 1871 Nothodiplax Belle, 1984 Octogomphus Selys, 1873 Oligoclada Karsch, 1890 Ophiogomphus Selys, 1854 Oplonaeschna Selys, 1883 Orthemis Hagen, 1861 Pachydiplax Brauer, 1868 Paltothemis Karsch, 1890 Pantala Hagen, 1861 Paracordulia Martin, 1906 Perigomphus Belle, 1972 Perithemis Hagen, 1861 Peruviogomphus Klots, 1944 Phenes Rambur, 1842 Phyllocycla Calvert, 1948 Phyllogomphoides Belle, 1970 Phyllopetalia Selys, 1858 Phyllothemis Fraser, 1935 Planiplax Muttkowski, 1910 Plathemis Hagen, 1861 Praeviogomphus Belle, 1995 Progomphus Selys, 1854 Pseudoleon Kirby, 1889 Racenaeschna Calvert, 1958 Remartinia Navás, 1911 Rhionaeschna Foerster, 1909 Rhodopygia Kirby, 1889 Rialla Navás, 1915 Santosia Costa and T. Santos, 1992 Scapanea Kirby, 1889 Somatochlora Selys, 1871 Staurophlebia Brauer, 1865 Stylogomphus Fraser, 1922 Stylurus Needham, 1897 Sympetrum Newman, 1833 Tachopteryx Uhler in Selys, 1859 Tanypteryx Kennedy, 1917 Tauriphila Kirby, 1889 Tholymis Hagen, 1867 Tibiagomphus Belle, 1992 Tramea Hagen, 1861 Triacanthagyna Selys, 1883 Uracis Rambur, 1842 Williamsonia Davis, 1913 Ypirangathemis Santos, 1945 Zenithoptera Selys, 1869 Zonophora Selys, 1854
Vrste Aeschnosoma auripennis Geijskes, 1970 Aeschnosoma elegans Selys, 1871 Aeschnosoma forcipula Hagen in Selys, 1871 Aeschnosoma marizae Santos, 1981 Aeschnosoma rustica Hagen in Selys, 1871 Aeshna brasiliensis von Ellenrieder and Costa, 2002 Aeshna canadensis Walker, 1908 Aeshna clepsydra Say, 1839 Aeshna coerulea (Ström, 1783) Aeshna constricta Say, 1839 Aeshna crenata Hagen, 1856 Aeshna eremita Scudder, 1866 Aeshna interrupta Walker, 1908 Aeshna itatiaia Carvalho and Salgado, 2004 Aeshna juncea (Linnaeus, 1758) Aeshna mixta Latreille, 1805 Aeshna palmata Hagen, 1856 Aeshna persephone Donnelly, 1961 Aeshna septentrionalis Burmeister, 1839 Aeshna serrana Carvalho and Salgado, 2004 Aeshna sitchensis Hagen, 1861 Aeshna subarctica Walker, 1908 Aeshna tuberculifera Walker, 1908 Aeshna umbrosa Walker, 1908 Aeshna verticalis Hagen, 1861 Aeshna walkeri Kennedy, 1917 Aeshna williamsoniana Calvert, 1905 Agriogomphus ericae (Belle, 1966) Agriogomphus jessei (Williamson, 1918) Agriogomphus sylvicola Selys, 1869 Agriogomphus tumens (Calvert, 1905) Allopetalia pustulosa Selys, 1873 Allopetalia reticulosa Selys, 1873 Anatya guttata (Erichson, 1848) Anatya januaria Ris, 1911 Anax amazili (Burmeister, 1839) Anax concolor Brauer, 1865 Anax junius (Drury, 1773) Anax longipes Hagen, 1861 Anax strenuus Hagen, 1867 Anax walsinghami McLachlan, 1883 Andaeschna andresi (Rácenis, 1958) Andaeschna rufipes (Ris, 1918) Andaeschna timotocuica De Marmels, 1994 Andaeschna unicolor (Martin, 1908) Anomalophlebia nitida Belle, 1995 Antidythemis nigra Buchholz, 1952 Antidythemis trameiformis Kirby, 1889 Aphylla alia Calvert, 1948 Aphylla angustifolia Garrison, 1986 Aphylla barbata Belle, 1994 Aphylla boliviana Belle, 1972 Aphylla brasiliensis Belle, 1970 Aphylla brevipes (Selys, 1854) Aphylla caraiba (Selys, 1854) Aphylla caudalis Belle, 1987 Aphylla dentata (Selys, 1859) Aphylla distinguenda (Campion, 1920) Aphylla edentata (Selys, 1869) Aphylla exilis Belle, 1994 Aphylla janirae Belle, 1994 Aphylla linea Belle, 1994 Aphylla molossus Selys, 1869 Aphylla producta (Selys, 1854) Aphylla protracta (Hagen in Selys, 1859) Aphylla robusta Belle, 1976 Aphylla scapula Belle, 1992 Aphylla silvatica Belle, 1992 Aphylla spinula Belle, 1992 Aphylla tenuis (Hagen in Selys, 1859) Aphylla theodorina (Navás, 1933) Aphylla williamsoni (Gloyd, 1936) Archaeogomphus densus Belle, 1982 Archaeogomphus furcatus Williamson, 1923 Archaeogomphus globulus Belle, 1994 Archaeogomphus hamatus (Williamson, 1918) Archaeogomphus infans (Ris, 1913) Archaeogomphus nanus Needham, 1944 Archaeogomphus vanbrinkae Machado, 1994 Argyrothemis argentea Ris, 1911 Arigomphus cornutus (Tough, 1900) Arigomphus furcifer (Hagen in Selys, 1878) Arigomphus lentulus (Needham, 1902) Arigomphus maxwelli (Ferguson, 1950) Arigomphus pallidus (Rambur, 1842) Arigomphus submedianus (Williamson, 1914) Arigomphus villosipes (Selys, 1854) Basiaeschna janata (Say, 1839) Boyeria grafiana Williamson, 1907 Boyeria vinosa (Say, 1839) Brachymesia furcata (Hagen, 1861) Brachymesia gravida (Calvert, 1890) Brachymesia herbida (Gundlach, 1889) Brasiliogomphus uniseries Belle, 1995 Brechmorhoga diplosema Ris, 1913 Brechmorhoga flavopunctata (Martin, 1897) Brechmorhoga innupta Rácenis, 1954 Brechmorhoga latialata González-Soriano, 1999 Brechmorhoga mendax (Hagen, 1861) Brechmorhoga neblinae De Marmels, 1989 Brechmorhoga nubecula (Rambur, 1842) Brechmorhoga pertinax (Hagen, 1861) Brechmorhoga praecox (Hagen, 1861) Brechmorhoga praedatrix Calvert, 1909 Brechmorhoga rapax Calvert, 1898 Brechmorhoga tepeaca Calvert, 1908 Brechmorhoga travassosi Santos, 1946 Brechmorhoga vivax Calvert, 1906 Cacoides latro (Erichson, 1848) Cannaphila insularis Kirby, 1889 Cannaphila mortoni Donnelly, 1992 Cannaphila vibex (Hagen, 1861) Castoraeschna castor (Brauer, 1865) Castoraeschna colorata (Martin, 1908) Castoraeschna coronata (Ris, 1918) Castoraeschna decurvata Dunkle and Cook, 1984 Castoraeschna januaria (Hagen, 1867) Castoraeschna longfieldae (Kimmins, 1929) Castoraeschna margarethae Jurzitza, 1979 Castoraeschna tepuica De Marmels, 1989 Celithemis amanda (Hagen, 1861) Celithemis bertha Williamson, 1922 Celithemis elisa (Hagen, 1861) Celithemis eponina (Drury, 1773) Celithemis fasciata Kirby, 1889 Celithemis martha Williamson, 1922 Celithemis ornata (Rambur, 1842) Celithemis verna Pritchard, 1935 Cordulegaster bilineata (Carle, 1983) Cordulegaster diadema Selys, 1868 Cordulegaster diastatops (Selys, 1854) Cordulegaster dorsalis Hagen in Selys, 1858 Cordulegaster erronea Hagen in Selys, 1878 Cordulegaster maculata Selys, 1854 Cordulegaster obliqua (Say, 1839) Cordulegaster sayi Selys, 1854 Cordulegaster talaria Tennessen, 2004 Cordulia shurtleffii Scudder, 1866 Coryphaeschna adnexa (Hagen, 1861) Coryphaeschna amazonica De Marmels, 1989 Coryphaeschna apeora Paulson, 1994 Coryphaeschna diapyra Paulson, 1994 Coryphaeschna huaorania Tennessen, 2001 Coryphaeschna ingens (Rambur, 1842) Coryphaeschna perrensi (McLachlan, 1887) Coryphaeschna viriditas Calvert, 1952 Crocothemis servilia (Drury, 1773) Cyanogomphus comparabilis Belle, 1994 Cyanogomphus conchinus Williamson, 1916 Cyanogomphus demerarae Selys, 1894 Cyanogomphus minutus Belle, 1970 Cyanogomphus pumilus Belle, 1986 Cyanogomphus schroederi Belle, 1970 Cyanogomphus waltheri (Selys, 1873) Dasythemis esmeralda Ris, 1910 Dasythemis essequiba Ris, 1919 Dasythemis mincki (Karsch, 1889) Dasythemis venosa (Burmeister, 1839) Deielia phaon (Selys, 1883) Desmogomphus paucinervis (Selys, 1873) Desmogomphus tigrivensis Williamson, 1920 Diaphlebia angustipennis (Selys, 1854) Diaphlebia nexans Calvert, 1903 Diastatops dimidiata (Linnaeus, 1758) Diastatops emilia Montgomery, 1940 Diastatops estherae Montgomery, 1940 Diastatops intensa Montgomery, 1940 Diastatops maxima Montgomery, 1940 Diastatops nigra Montgomery, 1940 Diastatops obscura (Fabricius, 1775) Diastatops pullata (Burmeister, 1839) Didymops floridensis Davis, 1921 Didymops transversa (Say, 1839) Dorocordulia lepida (Hagen in Selys, 1871) Dorocordulia libera (Selys, 1871) Dromogomphus armatus Selys, 1854 Dromogomphus spinosus Selys, 1854 Dromogomphus spoliatus (Hagen in Selys, 1858) Dythemis fugax Hagen, 1861 Dythemis maya Calvert, 1906 Dythemis multipunctata Kirby, 1894 Dythemis nigrescens Calvert, 1899 Dythemis rufinervis (Burmeister, 1839) Dythemis sterilis Hagen, 1861 Dythemis velox Hagen, 1861 Edonis helena Needham, 1905 Elasmothemis alcebiadesi (Santos, 1945) Elasmothemis cannacrioides (Calvert, 1906) Elasmothemis constricta (Calvert, 1898) Elasmothemis kiautai (De Marmels, 1989) Elasmothemis schubarti (Santos, 1945) Elasmothemis williamsoni (Ris, 1919) Elga leptostyla Ris, 1911 Elga newtonsantosi Machado, 1992 Epiaeschna heros (Fabricius, 1798) Epigomphus armatus Ris, 1918 Epigomphus camelus Calvert, 1905 Epigomphus clavatus Belle, 1980 Epigomphus compactus Belle, 1994 Epigomphus corniculatus Belle, 1989 Epigomphus crepidus Kennedy, 1936 Epigomphus donnellyi González-Soriano and Cook, 1988 Epigomphus echeverrii Brooks, 1989 Epigomphus flinti Donnelly, 1989 Epigomphus gibberosus Belle, 1988 Epigomphus houghtoni Brooks, 1989 Epigomphus hylaeus Ris, 1918 Epigomphus jannyae Belle, 1993 Epigomphus llama Calvert, 1903 Epigomphus maya Donnelly, 1989 Epigomphus obtusus (Selys, 1869) Epigomphus occipitalis Belle, 1970 Epigomphus paludosus (Hagen in Selys, 1854) Epigomphus paulsoni Belle, 1981 Epigomphus pechumani Belle, 1970 Epigomphus quadrices Calvert, 1903