Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada

Superfamily Aphidoidea

Aphids (Homoptera: Aphidoidea) of the Yukon
By R. Foottit & E. Maw
H.V. Danks & J.A. Downes (Eds.), Insects of the Yukon. Biological Survey of Canada (Terrestrial Arthropods), Ottawa: 387 – 404, 1997
Full text
Detailed accounts of >100 spp. recorded or expected to occur in the Yukon Territory (distribution, habitats, host plants) with insight into the composition and origins of the fauna.

Aphids on the World's Trees : an Identification and Information Guide.
By Blackman and Eastop
CAB International in association with The Natural History Museum, 1994

Aphids on the World's Crops: An Identification and Information Guide.
By Blackman and Eastop
Wiley, 2000

Aphids on the World's Herbaceous Plants and Shrubs
By Blackman and Eastop
Wiley, 2007

Defense expression in the aphid Myzocallis asclepiadis.
By McMartin, K.A. & S.B. Malcolm.
Pierce Cedar Creek Institute, Hastings, MI. 15 pp., 2008
Full PDF

McMartin, K.A. & S.B. Malcolm. 2008. Defense expression in the aphid Myzocallis asclepiadis. Final Report. Pierce Cedar Creek Institute, Hastings, MI. 15 pp.


The aphid Myzocallis asclepiadisis a relatively unknown species that feeds on the common milkweed Asclepias syriaca. This aphid is very mobile and mobility appears to be the primary defense against predators. However, over the course of the summer, the aphid changes color, from a pale yellow-green to having orange spots. This aphid could be a model to answer the question of how aposematism evolves. In this study, a natural, unmanipulated population of My. asclepiadisis was monitored, and experiments manipulating development and density to determine the nature of the color change were conducted. However, it does not appear that development and density are cues for color change. Photographic analysis of color and HPLC analysis are underway to determine the extent of color change and whether that change corresponds to an increase in cardenolide sequestration.

Ants defend aphids against lethal disease.
By Nielsen, C., A.A. Agrawal, and A.E. Hajek.
Biology Letters DOI: 10.1098/rsbl.2009.0743, 2009
Full Text

Nielsen, C., A.A. Agrawal, and A.E. Hajek. 2009. Ants defend aphids against lethal disease. Biology Letters DOI: 10.1098/rsbl.2009.0743


Social insects defend their own colonies and some species also protect their mutualist partners. In mutualisms with aphids, ants typically feed on honeydew produced by aphids and, in turn guard and shelter aphid colonies from insect natural enemies. Here we report that Formica podzolica ants tending milkweed aphids, Aphis asclepiadis, protect aphid colonies from lethal fungal infections caused by an obligate aphid pathogen, Pandora neoaphidis.

Light- induced electron transfer and ATP synthesis in a carotene synthesizing insect
By Jean Christophe Valmalette, Aviv Dombrovsky, Pierre Brat, Christian Mertz, Maria Capovilla, Alain Robichon
Scientific Reports, 2012
Full text (PDF)

"A singular adaptive phenotype of a parthenogenetic insect species (Acyrthosiphon pisum) was selected in cold conditions and is characterized by a remarkable apparition of a greenish colour. The aphid pigments involve carotenoid genes well defined in chloroplasts and cyanobacteria and amazingly present in the aphid genome, likely by lateral transfer during evolution. The abundant carotenoid synthesis in aphids suggests strongly that a major and unknown physiological role is related to these compounds beyond their canonical anti-oxidant properties.

Ericaphis voegtlini, a new, unusual aphid species from the USA (Hemiptera, Aphididae)
By Shalva Barjadze, Andrew S. Jensen, Mariusz Kanturski
ZooKeys 785:133-143, 2018
Full text (PDF)