Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Upcoming Events

Discussion of 2018 gathering

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

Photos of insects and people from the 2013 gathering in Arizona, July 25-28

Photos of insects and people from the 2012 gathering in Alabama

Photos of insects and people from the 2011 gathering in Iowa

Photos from the 2010 Workshop in Grinnell, Iowa

Photos from the 2009 gathering in Washington

Aphid ID - Uroleucon pseudambrosiae

Aphid ID - Uroleucon pseudambrosiae
Norfolk, Virginia, USA
June 22, 2008
Size: 2.5mm
Host plant looked like wild lettuce (Lactuca canadensis) but not positive. Plant has not flowered yet.

Images of this individual: tag all
Aphid ID - Uroleucon pseudambrosiae Aphid ID - Uroleucon pseudambrosiae

Moved from Uroleucon. ID based on host plant, using a reference with a key to species of this genus in Michigan--i.e., the ID is not 100% positive but is highly likely.

The flattened and grooved surface of this stem (assuming that's what it is) suggests it is a species of sow-thistle (Sonchus). See this stem as an example.

but I only see the spiny variety in VA. There were no spines on the leaves and the plant resembles Sonchus asper without the spines, of course.

Food plant
I have been trying to take some shots of the plant itself. Many times I forget; but it is important to remember that, with many plant feeding insects, the host plant is important for an ID. And it is nice to know that there is a botanist among us who can give us a hand.

Funny thing happened..
as I remember. I went back to get an image of the plant and it was gone! I couldn't find a trace of it. This year, more of them appeared and I didn't see any aphids on them.

Back to lettuce
Thanks for that information! No spines takes it out of Sonchus. Moreover, upon further perusal of manuals, the "groove" I mentioned earlier appears too wide to match up with other Sonchus stems. Let's leave this one as Lactuca canadensis after all.

Moved from Aphids.

Nice image
We have to get hold of an aphid specialist one of these days.

Comment viewing options
Select your preferred way to display the comments and click 'Save settings' to activate your changes.