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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » True Bugs, Cicadas, Hoppers, Aphids and Allies (Hemiptera) » Plant-parasitic Hemipterans (Sternorrhyncha) » Aphidoidea » Aphids (Aphididae) » Parasitized / Mummies
Photo#1491271
Cowpea Aphid (Aphis craccivora)? - Portland, OR
Copyright © 2018 Jeffrey Lee

Cowpea Aphid (Aphis craccivora)? - Portland, OR
Portland, Multnomah County, Oregon, USA
September 30, 2017
Size: <2 mm body length
On horseweed (Erigeron canadensis).

From the solid black shiny carapace, as well as the general seasonality and distribution, I am leaning towards A. craccivora (vs. A. fabae, A. rumicis, and A. hederae):
-http://influentialpoints.com/Gallery/Aphis_craccivora.htm
-https://bugguide.net/node/view/356327

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Cowpea Aphid (Aphis craccivora)? - Portland, OR Cowpea Aphid (Aphis craccivora)? - Portland, OR
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Contributed by Jeffrey Lee on 9 February, 2018 - 2:34am
Last updated 15 January, 2020 - 10:56am

Moved
Moved from Aphids.
… Natalie Hernandez, 15 January, 2020 - 10:56am login or register to post comments

Don't think so.
Aphis craccivora never has pale siphunculi, always dark, the head tends to be dark as well, and the legs are banded, not solidly pale. I'm wondering if this is parasitized and that's why the body appears so dark when the appendages and head are pale. The second specimen in your hand fits A. craccivora better, but is difficult to see. Both specimens seem fairly dessicated.
… Natalie Hernandez, 9 February, 2018 - 10:52am login or register to post comments

Moved
Moved from ID Request.
… Ken Wolgemuth, 9 February, 2018 - 8:16am login or register to post comments

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