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Species Pemphigus populicaulis

Pemphigus populicaulis & cottonwood gall - Pemphigus populicaulis

Pemphigus gall? - Pemphigus populicaulis

Pemphigus populicaulis? - Pemphigus populicaulis

Cottonwood gall - Pemphigus populicaulis

Classification

Kingdom Animalia (Animals)

Phylum Arthropoda (Arthropods)

Subphylum Hexapoda (Hexapods)

Class Insecta (Insects)

Order Hemiptera (True Bugs, Cicadas, Hoppers, Aphids and Allies)

Suborder Sternorrhyncha (Plant-parasitic Hemipterans)

Superfamily Aphidoidea

Family Aphididae (Aphids)

Subfamily Eriosomatinae (Woolly Aphids and Gall-making Aphids)

Tribe Pemphigini

Genus Pemphigus

Species populicaulis (Pemphigus populicaulis)

Synonyms and other taxonomic changes

First described in 1859 by Asa Fitch under the name Pemphigus populicaulis

Explanation of Names

populicaulis is from Latin populus, the scientific name for the poplar tree + caulis- "stalk or stem", probably both in the genitive case- thus meaning "of poplar stalks or stems". Fitch gave this species the common name "Poplar-stem Gall-louse", based on the obsolete name of "Plant Lice" for aphids.

Remarks

Causes twisted, subglobular galls with oblique openings at the base of cottonwood (Populus) leaf blades. (1)

Internet References

Fifth Report On The Noxious, Beneficial and Other Insects of New York State, p.845-849 Asa Fitch's original description of the species

Works Cited

1.	Plant Galls and Gall Makers Ephraim Porter Felt. 1940. Comstock Publishing Company, Inc., Ithaca NY.

Contributed by Charley Eiseman on 19 July, 2009 - 5:52pm
Additional contributions by Chuck Entz
Last updated 26 October, 2009 - 8:44am

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