Eomacrosiphon

Eomacrosiphon nigromaculosum (MacDougall)

After almost 30 years of avidly collecting aphids on wild roses, knowing this species was out there somewhere and feeling frustrated at not funding it, in 2017 I finally stumbled on it just outside Lakeview.  It was growing on a patch of roses on a cold slope in a steep, braided mountain stream.  At first I didn’t know what it was, having never seen a photo of E. nigromaculosum.  I was also thrown off by the short siphunculi that look more like a Brachycaudus or big Dysaphis than what I expected of E. nigromaculosum.  Eventually I realized what I had found, and concluded that the short siphunculi were owing to the fact that these specimens were fundatrices (this stage often has short siphunculi in Aphidinae).  Subsequently I was able to collect summer apterous females, and in early September, oviparae and males.

Eomacrosiphon nigromaculosum fundatrix on a wild rose near Lakeview, OR.

Eomacrosiphon nigromaculosum second generation on a wild rose near Lakeview, OR.