[Order] Hemiptera Linnaeus, 1758 - true bugs
   Suborder Sternorrhyncha Amyot & Audinet-Serville, 1843 - aphids, psyllids, whiteflies and scales
     Infraorder Aphidodea
       Superfamily Phylloxeroidea Herrich-Schaeffer, 1854
         Family Adelgidae (Annand, 1928) - adelgids
           Subfamily Pineinae
             Genus Pineus Shimer, 1869
               Subgenus Pineus Shimer, 1869
                 1 Pineus abietinus Underwood & Balch, 1964
                 2 Pineus cembrae (Cholodkovsky, 1888)
                 3 Pineus coloradensis (Gillette, 1907)
                 4 Pineus englemanni Annand
                 5 Pineus floccus (Patch, 1909) - red spruce adelgid
                 6 Pineus pineoides (Cholodkovsky)
                 7 Pineus similis (Gillette, 1907) - ragged spruce gall adelgid
                 8 Pineus strobi (Hartig) - pine bark adelgid
                 9 Pineus sylvestris Annand, 1928