>I may be wrong here, but I think the superfamily name is nothing more than a post hoc exaltation of the family name; it is not a nomenclatorial act per se.<
>Short version: both nomina date to 1835.<

Slightly longer version: For nomenclatural purposes, the date of any family-level name is the same as the first use of the nominate genus to make a family-level name.  In most cases, the family level would be used before superfamily, subfamily, etc
However, it may be of interest to know who first thought that a particular family thought it worth designating as a superfamily.  Hopefully the author gave some indication as to why it merited higher recognition.  Thus, some references will also cite the author responsible for the promotion of an existing familial name to superfamily status.

    Dr. David Campbell
    Old Seashells
    University of Alabama
    Biodiversity & Systematics
    Dept. Biological Sciences
    Box 870345
    Tuscaloosa, AL  35487 USA
    [log in to unmask]

That is Uncle Joe, taken in the masonic regalia of a Grand Exalted Periwinkle of the Mystic Order of Whelks-P.G. Wodehouse, Romance at Droitgate Spa