Enoplopactus sanjuaninus differentiates from E. lizeri and E. catamarcensis mainly by the subcylindrical pronotum with strongly curved flanks. The integument is mostly denuded, except for the cream-yellow stripes along the elytra, which are wider than in E. catamarcensis.
A key to species of Enoplopactus was provided by Lanteri (1990c).
Unknown.
Probably associated with vegetation typical of the Monte biogeographic province, such as Prosopis sp and Larrea sp.