We have found in the Banamichi and Arizpe Baptisimal records where 
our ancestors were Opata Indios.  Not speaking or reading Spanish, 
we didn't recognize the term Opata, until we started reading all the 
wonderful information that comes thru the Ranchos site.  All the 
years of researching Rich's ancestors in Jalisco and Zacatecas, we 
have never found the name of the Indios,  but only three generations 
back, we find that my father, born in Banamichi, Sonora, has 
ancestors clearly listed as Opata Indios.  This area of Sonora is 
very hard to research, since the University of Arizonia went in and 
filmed a lot of the church records, (called the 811 filmes), so now 
the FHL does not see the need to extract this information on their 
own films.  So you find very little extracted out there on the FHL 
website.
We were fortunate to spend a few days at the University of Arizona, 
Tuscon,  and got into the 811 films.  There are 27 rolls of films.  
Found some census and printed every

I have baptism, death, and marriage records for my paternal line 
which date from 1650 to 1825 in Etzatlán.  My line moved to 
Guadalajara.   Most of them were identified as Indios by the church.  
But unfortunately, the tribe is never mentioned.

Gloria