Xacoalco is in the state of Jalisco, south of Guadalajara.
The field numbers that Reppenhagen gave to plants he found in Jalisco were 629 - 652, 806, 1385 - 1382, 1603 - 1623, 2306 - 2311.
I can't see any numbers that might be obviously changed by error to 1140. So a mystery plant, and it'll be interesting to see how your seedlings develop. Where did your seed come from?
Do your seedlings show any hooked spines? One species from around there could be M. jaliscana.