Thanks Dana, I had forgotten Juan's remarkable studies on Spanish arms, and to be honest I did not recall the interim part of the crossguard across the inner part of the cup being absent (I need to find pics again
but it seems the bar extends across in the ones I've seen. As far as I have known, the straight quillon guard essentially sits atop or in the top of the cup.
I do know that the continuation of the cuphilt phenomenon continued as noted into the 19th century in the colonial regions, and I have even seen 'court' type cuphilts with the traditional bowl and a vestigial crossguard across its base as a straight bar! obviously entirely redundant.