Cordulia shurtleffi exuvium Cordulia shurtleffii female Cordulia shurtleffii male Epitheca spinigera female Somatochlora albicincta exuvium Somatochlora albicincta female Somatochlora albicincta male Somatochlora cingulata male Somatochlora franklini female Somatochlora franklini male Somatochlora hudsonica exuvium Somatochlora hudsonica male Somatochlora husonica male Somatochlora kennedyi exuvium Somatochlora minor female Somatochlora sahlbergi exuvium Somatochlora semicircularis female Somatochlora semicircularis male Somatochlora septentrionalis Somatochlora walshii female Somatochlora whitehousei exuvium