- AnisoradsiaIredale & May, 1916
- AutochitonIredale & Hull, 1924
- ChartoplaxIredale & Hull, 1924
- Chiton (Ischnochiton)Gray, 1847
- Chiton (Ischnoradsia)Shuttleworth, 1853 (original combination)
- HaploplaxPilsbry, 1894
- Haploplax (Chartoplax)Iredale & Hull, 1925
- HeterozonaCarpenter [in Dall], 1879
- Ischnochiton (Anisoradsia)Iredale & May, 1916
- Ischnochiton (Chartoplax)Iredale & Hull, 1924
- Ischnochiton (Haploplax)Pilsbry, 1894
- Ischnochiton (Heterozona)Carpenter [in Dall], 1879· accepted, alternate representation
- Ischnochiton (Ischnochiton)Gray, 1847· accepted, alternate representation
- Ischnochiton (Ischnoradsia)Shuttleworth, 1853· accepted, alternate representation
- Ischnochiton (Radsiella)Pilsbry, 1892
- Ischnochiton (Simplischnochiton)Van Belle, 1974
- IschnoradsiaShuttleworth, 1853
- LepidoradsiaCarpenter, 1879
- LophyropsisThiele, 1893
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