Naupactus laticollis is similar to the squamose morphotype of N. tarsalis and mainly differentiates because the integument is mostly covered with light brown piliform scales, more dense on margins of pronotum and elytra; eyes are less convex, elytra are shorter, and body size is usually smaller. Other characters are similar to those of N. tarsalis e.g. long slender antennae, truncate-conical pronotum, with very slightly punctate disc, curved flanks and strongly bisinuate beveled base; elytra have strongly bisinuate and thickened base, broad humeri, flat intervals and distinct punctures on striae; corbels of hind tibiae are slender.

Males are more slender than females and tarsi of the front legs are widened.

Prosopis nigra (Grisebach) Hieron (Fabaceae) (Lanteri et al. 2002a).

Associated with native vegetation of the Chacoan biogeographic province.