Gerardo Lomelin

Hello Everyone, I need help with my 7th grgrandparents Gerardo Lomelin and Josepha Delgadillo's parents. Gerardo and Josepha were married 24 Nov 1728 in Nochistlan, but there parents are not listed, and there is no informacion matrimonial for that year online. Can someone tell me how to check to see if there is information for that year.

Thank you
Lisa