Joe -

The good father probably omitted it because of the unsettled nature of academic thought on the matter. I have references using at least 6 different spellings of Kalipygos, Kallipygos, Kallipygnos, Kallypigos, Callipigos, and Callipygous, and I think there are others. The "K" spellings would be more likely the Greek, I would think; but in that case she should have been an Athena (or Athene)?. The actual statue, I believe, was originally thought to be Greek, but now is(?) usually listed as a Roman copy (from a Greek original?).

The alternate Steatopygos or Steatopygios actually means(?) "fat butt," and I have seen it only a couple of times. My first sight of the statue, in fact, came from a 1930s era "Eugenics" book that a relative had hidden in the garage rafters. "Auntie" wouldn't let him keep it in the house because of the "dirty pictures," but the statue was used as an illustration for the "steatopygic" body type in the anatomy section. Very impressive to a 7 year old kid...60 years ago, but maybe not now.

Even for the better known Venus de Milo the case is muddied. The Louvre displayed her as a "classic period" work for a long time, even though the base she was found on identified the sculptor as a saxophone player in a late period Roman rock band. (At least there's documentation that he won an instrumental music contest and wrote a few plays.) The Louvre conveniently "misplaced" the base, because they really wanted something from the classical period to compete with other museums.

Any Google image search for "Venus" should turn up de Milo, Kallipygos, Esquilina, de Medici, and the "crouching Venus." They're all widely posted, but in fact may be a little difficult to document or to learn much about because of the frequency with which they appear on "know-nothing" sites. As with musicians, how well you're known depends largely on who your publicist is.

John