Stysiana, a new genus and four new species of Pentatomini (Heteroptera: Pentatomidae)

Stysiana gen. n. is described to include four new species, S. pardidens sp. n., type species, from Guyana, Colombia, Brazil and Peru, S. acarinatis sp. n. from Paraguay and Argentina, S. tropicalis sp. n. from Trinidad, Suriname and Brazil, and S. meridionalis sp. n. from southern Brazil and Argentina. Stysiana gen n., with its species, are keyed with other three correlated genera, Amauromelpia Fernandes et Grazia, 1998, Hypatropis Bergroth. 1891 and Luridocimex, Grazia, Fernandes et Schwertner, 1998.