There seems to be a bit more information in this earlier birth to the couple.
A sister... Maria Rosa Spolidoro - born in 1866
You will notice that in both the 1876 and 1866 records Giovanni gives his age as 50 ...
#72
Dated 1 July 1866 in Marsicovetere.
Child born on 30 June at 8 PM
Father is Giovanni Spolidoro [son of deceased Nicola] age 50, peasant farmer residing in Marsicovetere.
Mother is Teresa Vita [daughter of deceased Giusppe] his wife residing with him.
Child given the name Maria Rosa Spolidoro.
https://familysearch.org/pal:/MM9.3.1/T ... ,392254902
EDIT TO ADD:
Is this your GGGF, or perhaps another brother?
You may notice that Giovanni Spolidoro gives his age as 50 on this record, too!
Michele Antonio Spolidoro
#42
Dated 9 May 1869 in Marsicovetere - born on 8 May at 9 AM
Father: Giovanni Spolidoro [son of deceased Nicola], age 50, peasant farmer
Mother: Teresa Vita, his wife residing with him at Strada Pianitello(sp?)
Child was given the name MICHELE ANTONIO SPOLIDORO
https://familysearch.org/pal:/MM9.3.1/T ... ,392254902
T.