Good key characters on Haliplidae, Dytiscidae and Gyrinidae Sept 30, 2013 18:13:29 GMT Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by Admin on Sept 30, 2013 18:13:29 GMT Hi everybody,These three pictures provide some quite good key characters to begin with on the families Haliplidae, Gyrinidae and Dytiscidae.