I replaced the picture with a better one I just took. I think I see the punctures you may be talking about. The beetle measures 6 mm.

is the next step following clear photographic evidence of the characteristic string of elytral punctures in some of the striae. Three other southwestern genera with such punctures probably can be excluded: Discoderus (very large circular pronotum), Stenomorphus (pronotum markedly elongated), and Athrostictus (iridescent and elytral intervals diffusely punctate). Amblygnathus requires a clypeus with distinct emargination of its distal border (concave) thus exposing the base of the labrum. Image is too dark to show that diagnostic section. If clypeus shows distal border straightish, then we have Selenophorus (my hunch). Correction: the strings of punctures are restricted to stria #2, #5, #7 ("along 3rd interval" as I had stated earlier might be misleading).