Calvillo, Ags. - Donato Gutierrez and Feliciana Serna b. 1855

I have a civil records entry from Calvillo, Ags. Deaths 1935 lists Felicana Serna as the child of Juan Serna and Petra ( no name given) and widow of Donato Gutierrez. under the civil Records 1935 image no 343 of 568. Page no 59. I would like some verification of this marriage or the Family history of Feliciana Serna. any info on a donato Gutierrez would be appreciated.