Naupactus verecundus is similar to N. tremolerasis in size and general body shape but easily differentiates because the scaly vestiture is usually purple-violet or green, with suture, 4º interval and the two marginal intervals of the elytra denuded of scales; elytral setae are fine, very long and erect. Pronotum and elytra are slightly narrower and longer than in N. tremolerasis. The scutellum is whitish and the corbels of the hind tibiae are absent as in the latter species.
Males are infrequent in most populations, except in Córdoba province. Females are infected with the bacterium Wolbachia, that induces parthenogenesis in several species of Naupactini (Rodriguero et al. 2010a).
Eggs and oviposition habits have been described by Marvaldi (1999), and first instar larva, by Marvaldi (1998).
Associated with xerophytic shrubs typical of the Espinal and Monte biogeographic provinces, such as Baccharis salicifolia (Ruiz et Pavón) Pers., Baccharis spartioides (Hook. et Arn.) Remy. (Asteraceae), Portieria sp (Zygophyllaceae) and Oenothera stricta Ledeb ex Link (Onagraceae).
It causes damages on Vitis vinifera L. (Vitaceae), other fruit plants and ornamental garden shrubs in Argentina (mainly in Mendoza province) and central Chile (Elgueta 1993, Lanteri et al. 2002a). It was recently found damaging Glycine max (L.) Merr. (Fabaceae) in Córdoba province.
Silva et al. (1968) cited N. verecundus for southern Brazil, damaging grapes, but we cannot confirm its presence in that country.