i mean you don't know so much about italian syndicates and i adviced you to read the john dickie books, even better than the italian ones about the subject although he's british
it's sure that sicilian mafia is a hierarchical and single big criminal group since at least the 1830s, with specific rituals and ranks (boss/underboss/consigliere/capodecina/soldier) there are several proofs confirmed it, the sangiorgi report in the ending of 1800s, for example, showed there was a boss of bosses, francesco siino (boss of noce cosca)
the uditiore crime family/cosca led by giammona in 1800s had the same rituals and ranks than the current one, in orther words it was the same organization sicilian mafia, also knows as cosa nostra, it is not so difficult to understand honesty
in the uditore neighborhood there is only 1 family/cosca even today, the other are part of uditore 'mandamento' (passo di rigano and torretta families), because sicilian mafia is divided into 'mandamenti' (3 or more neighbouring families) and the boss of the mandamento is a member of the provincial commission (in this case palermo), formed by all 'capimanddamento'
sicilian mafia is a secretive society, so it's logic there are not years of fundation and stuff like that like yakuza, and also the sicilian mafia was recognized officially by italian government and police only in 1992, before its existence was just theorized
and that's because the only sources in a criminal society are turncoats, there were turncoats also in the past, even in 1800s, but the trials ended with acquittance for not enough proofs