I would need to check and see if these include any peccary (I am writing this page in Newark, NJ airport, en route from a (museum) glass printing technology expo in Germany, en route to a textile printing technology expo in Las Vegas, and presently there is no Internet available to check (and I am rather far from any of my libraries)). However one place you see a lot of reptiles and mammals on stone sculptures is at Copan.
I do not know many peccary shown on stone stelae or altars. white-lipped peccary, Tayassu albirostris, synonym of Tayassu pecari Peccaries in Classic Maya Art, Iconography and Epigraphy Occasionally you can find a peccary as a ceramic figurine.collared peccary Tayassu tajacu, javelina.But out in the Neotropical forests, the two species are rather distinctive.
It is often tough to identify which species is represented in the renditions in stone or ceramic, so usually they are called just generic peccary. Peccaries can be found in Maya diet, art, astronomy, iconography and epigraphy.