The term seed bug can refer to several different true bugs. The term describes these bugs by their diet, seeds of various kinds of seed plant.
Listed by taxonomic rank below Insecta, a class:
Hemiptera (order) Pentatomomorpha (infraorder) Lygaeoidea (superfamily) Lygaeidae (family) various genera various species Rhyparochromidae (family) various genera various species Coreoidea (superfamily) Coreidae (family) Leptoglossus (genus) Leptoglossus occidentalis, the "western conifer seed bug"