| Species | Isonychus abdominalis Moser, 1918
| | |
| Species | Isonychus aenescens Moser, 1919
| | |
| Species | Isonychus aequatorialis Moser, 1924
| | |
| Species | Isonychus albicinctus Mannerheim, 1829
| | |
| Species | Isonychus albofasciatus Blanchard, 1850
| | |
| Species | Isonychus albosignatus Moser, 1921
| | |
| Species | Isonychus alienus Frey, 1970
| | |
| Species | Isonychus angosturanus Moser, 1924
| | |
| Species | Isonychus arbusticola Erichson, 1847
| | |
| Species | Isonychus argentinus Moser, 1919
| | |
| Species | Isonychus arizonensis Howden, 1959
Barnacles | | |
| Species | Isonychus aurantiacus Burmeister, 1855
| | |
| Species | Isonychus bahianus Frey, 1974
| | |
| Species | Isonychus bimaculatus Burmeister, 1855
| | |
| Species | Isonychus bistriga Burmeister, 1855
| | |
| Species | Isonychus bistrigus Burmeister, 1855
| | |
| Species | Isonychus bivittatus Burmeister, 1855
| | |
| Species | Isonychus boliviensis Moser, 1918
| | |
| Species | Isonychus braumeisteri Frey, 1969
| | |
| Species | Isonychus bruchiformis Germar, 1813
| | |
| Species | Isonychus burmeisteri Von Dalle Torre, 1912
| | |
| Species | Isonychus caelatus
| | |
| Species | Isonychus callosipygus Frey, 1965
| | |
| Species | Isonychus castaneus Burmeister, 1855
| | |
| Species | Isonychus catharinae Blanchard, 1850
| | |
| Species | Isonychus caudiculatus Moser, 1918
| | |
| Species | Isonychus cervicapra Frey, 1965
| | |
| Species | Isonychus cervinalis Frey, 1965
| | |
| Species | Isonychus cervinodes Frey, 1965
| | |
| Species | Isonychus cervinus Erichson, 1847
| | |
| Species | Isonychus chacoensis Moser, 1918
| | |
| Species | Isonychus chiriquinus Bates, 1887
| | |
| Species | Isonychus cinereus Blanchard, 1850
| | |
| Species | Isonychus concolor Blanchard, 1850 ⇒ Isonychus burmeisteri
| | |
| Species | Isonychus costaricensis Moser, 1918
| | |
| Species | Isonychus crinitus Blanchard, 1850 ⇒ Isonychus pilosus
| | |
| Species | Isonychus denudatus Blanchard, 1850
| | |
| Species | Isonychus discolor Moser, 1924
| | |
| Species | Isonychus egregius Frey, 1965
| | |
| Species | Isonychus elegans Blanchard, 1850
| | |
| Species | Isonychus elongatus Frey, 1965
| | |
| Species | Isonychus erectepilosus Frey, 1970
| | |
| Species | Isonychus fasciatipennis Moser, 1924
| | |
| Species | Isonychus fasciolatus Blanchard, 1850
| | |
| Species | Isonychus flaviventris Moser, 1921
| | |
| Species | Isonychus flavofasciatus Moser, 1918
| | |
| Species | Isonychus flavopilosus Moser, 1921
| | |
| Species | Isonychus fraternus Moser, 1918
| | |
| Species | Isonychus fraudulentus Frey, 1969
| | |
| Species | Isonychus fucatus Burmeister, 1855
| | |
| Species | Isonychus fulvescens Blanchard, 1850
| | |
| Species | Isonychus fulvipennis Moser, 1921
| | |
| Species | Isonychus fuscescens Blanchard, 1850
| | |
| Species | Isonychus fuscipennis Blanchard, 1850
| | |
| Species | Isonychus fuscomaculatus Moser, 1921
| | |
| Species | Isonychus gracilipes Blanchard, 1850
| | |
| Species | Isonychus gracilis Burmeister, 1855
| | |
| Species | Isonychus granarius Burmeister, 1855
| | |
| Species | Isonychus granuliventris Frey, 1970
| | |
| Species | Isonychus griceus
| | |
| Species | Isonychus griseolus Moser, 1921
| | |
| Species | Isonychus griseopilosus Moser, 1921
| | |
| Species | Isonychus griseus Mannerheim, 1829
| | |
| Species | Isonychus guayanensis Frey, 1970
| | |
| Species | Isonychus hiekei Frey, 1965
| | |
| Species | Isonychus hirsutus Bates, 1887
| | |
| Species | Isonychus impluviatus Burmeister, 1855 ⇒ Isonychus albofasciatus
| | |
| Species | Isonychus jaspideus Burmeister, 1855
| | |
| Species | Isonychus kulzeri Frey, 1967
| | |
| Species | Isonychus kuntzeni Moser, 1921
| | |
| Species | Isonychus laeoipygus
| | |
| Species | Isonychus laevipygus Frey, 1964
| | |
| Species | Isonychus leechi Frey, 1969
| | |
| Species | Isonychus limbatus Burmeister, 1855
| | |
| Species | Isonychus lindemannae Frey, 1974
| | |
| Species | Isonychus lineatus Burmeister, 1855
| | |
| Species | Isonychus lineola Blanchard, 1850
| | |
| Species | Isonychus lituratus Blanchard, 1850
| | |
| Species | Isonychus lojanus Frey, 1967
| | |
| Species | Isonychus maculatus Waterhouse, 1874
| | |
| Species | Isonychus maculipennis Moser, 1918
| | |
| Species | Isonychus marmoratus Blanchard, 1850
| | |
| Species | Isonychus marmoreus Burmeister, 1855
| | |
| Species | Isonychus microsquamosus Frey, 1970
| | |
| Species | Isonychus minutus Fabricius, 1801
| | |
| Species | Isonychus murinus Blanchard, 1850
| | |
| Species | Isonychus mus Burmeister, 1855
| | |
| Species | Isonychus mutans Frey, 1970
| | |
| Species | Isonychus neglectus Moser, 1918
| | |
| Species | Isonychus nigripes Moser, 1921
| | |
| Species | Isonychus nitens Moser, 1921
| | |
| Species | Isonychus nitidus Burmeister, 1855
| | |
| Species | Isonychus nubeculus Frey, 1969
| | |
| Species | Isonychus nubilus Burmeister, 1855
| | |
| Species | Isonychus nudipennis Frey, 1967
| | |
| Species | Isonychus obesulus Burmeister, 1855
| | |
| Species | Isonychus oblongoguttatus Moser, 1921
| | |
| Species | Isonychus oblongomaculatus Moser, 1921
| | |
| Species | Isonychus obsoletus Blanchard, 1850
| | |
| Species | Isonychus ocellatus Burmeister, 1855
| 1 | Subspecies |
| Species | Isonychus ochraceus Blanchard, 1850
| | |
| Species | Isonychus ohausi Moser, 1921
| | |
| Species | Isonychus ornatipennis Moser, 1921
| | |
| Species | Isonychus ovinus Erichson, 1847
| | |
| Species | Isonychus paganus Blanchard, 1850 ⇒ Isonychus religiosus
| | |
| Species | Isonychus paradoxus Bates, 1887
| | |
| Species | Isonychus parallelus Frey, 1970
| | |
| Species | Isonychus paranus Moser, 1921
| | |
| Species | Isonychus parvulus Moser, 1918
| | |
| Species | Isonychus pauloensis Frey, 1970
| | |
| Species | Isonychus pavoni
| | |
| Species | Isonychus pavonii Erichson, 1847
| | |
| Species | Isonychus pectoralis Walker, 1859
| | |
| Species | Isonychus penai Frey, 1966
| | |
| Species | Isonychus pereirai Frey, 1970
| | |
| Species | Isonychus peruanus Moser, 1921
| | |
| Species | Isonychus phlaeopterus Blanchard, 1850
| | |
| Species | Isonychus pictus Sharp, 1877
| | |
| Species | Isonychus pilicollis Moser, 1924
| | |
| Species | Isonychus pilosus Evans, 2003
| | |
| Species | Isonychus piperitus Bates, 1887
| | |
| Species | Isonychus plagiatus Burmeister, 1855
| | |
| Species | Isonychus podicalis Moser, 1918
| | |
| Species | Isonychus politus Burmeister, 1855
| | |
| Species | Isonychus prasinus Nonfried, 1891
| | |
| Species | Isonychus principalis Burmeister, 1855
| | |
| Species | Isonychus psittacinus Dejean, 1836
| | |
| Species | Isonychus pulchellus Moser, 1918
| | |
| Species | Isonychus religiosus Evans, 2003
| | |
| Species | Isonychus rosettae Frey, 1969
| | |
| Species | Isonychus ruficeps Moser, 1924
| | |
| Species | Isonychus rugicollis Burmeister, 1855
| | |
| Species | Isonychus saltanus Frey, 1969
| | |
| Species | Isonychus saylori Frey, 1969
| | |
| Species | Isonychus schneblei Frey, 1964
| | |
| Species | Isonychus scutellaris Moser, 1918
| | |
| Species | Isonychus setifer Moser, 1918
| | |
| Species | Isonychus setosus
| | |
| Species | Isonychus similis Frey, 1973
| | |
| Species | Isonychus simplex Frey, 1976
| | |
| Species | Isonychus simulator Frey, 1969
| | |
| Species | Isonychus soricinus Blanchard, 1850
| | |
| Species | Isonychus squamifer Blanchard, 1850
| | |
| Species | Isonychus squamulosus Frey, 1970
| | |
| Species | Isonychus striatipennis Moser, 1918
| | |
| Species | Isonychus striolatus Frey, 1970
| | |
| Species | Isonychus submaculatus Moser, 1921
| | |
| Species | Isonychus sulcatus Moser, 1918
| | |
| Species | Isonychus sulcicollis Moser, 1921
| | |
| Species | Isonychus sulphureus Mannerheim, 1829
| 2 | Subspecies |
| Species | Isonychus suturalis Mannerheim, 1829
| | |
| Species | Isonychus tenuiventris
| | |
| Species | Isonychus tenuivestis Moser, 1921
| | |
| Species | Isonychus tessellatus Burmeister, 1855
| | |
| Species | Isonychus tomentosus Burmeister, 1855
| | |
| Species | Isonychus tristis Moser, 1924
| | |
| Species | Isonychus unicolor Blanchard, 1850
| | |
| Species | Isonychus unidens Frey, 1972
| | |
| Species | Isonychus uniformis Moser, 1920
| | |
| Species | Isonychus ursus Moser, 1918
| | |
| Species | Isonychus varians Blanchard, 1850
| | |
| Species | Isonychus variegatus Germar, 1824
| | |
| Species | Isonychus variipennis Moser, 1918
| | |
| Species | Isonychus ventralis Moser, 1921
| | |
| Species | Isonychus vestitus Castelnau, 1840
| | |
| Species | Isonychus vicinus Moser, 1918
| | |
| Species | Isonychus villosus Blanchard, 1850 ⇒ Isonychus lituratus
| | |
| Species | Isonychus vittatus Burmeister, 1855
| | |
| Species | Isonychus vittiger Blanchard, 1850
| | |
| Species | Isonychus vittipennis Moser, 1921
| | |
| Species | Isonychus zikani Moser, 1921
| | |
