Cyclodiene is a sub-category of organochlorine insecticides. The other two in the organochlorine group are Dichlorodiphenylethanes and Chlorinated Benzenes & Cyclohexanes.
All are derived from hexachlorocyclopentadiene and have a similar structure based on two 3-dimensional carbon ring units, one of which is heavily chlorinated. WIth the exception of endosulfan, all are now banned in the US.
Aldrin - Used mainly as an extremely persistent contact insecticide.