Intertaxon relationships
species
Jeffrey Pine
Pinus jeffreyi Grev. et Balf.
Etorofus propinquus (Bland, 1865) 
Etorofus soror (LeConte, 1873)
Obrium californicum Van Dyke, 1920
Pogonocherus penicillatus LeConte in Agassiz, 1850
Poliaenus obscurus ponderosae Linsley, 1935