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Species Andricus ignotus

cottony leaf gall on bur oak - Andricus ignotus cottony leaf gall on bur oak - Andricus ignotus Andricus ignotus Andricus ignotus Andricus ignotus - female Andricus ignotus? - Andricus ignotus Andricus ignotus? - Andricus ignotus Andricus ignotus? - Andricus ignotus
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Hymenoptera (Ants, Bees, Wasps and Sawflies)
No Taxon ("Parasitica" (parasitic Apocrita))
Superfamily Cynipoidea
Family Cynipidae (Gall Wasps)
Tribe Cynipini
Genus Andricus
Species ignotus (Andricus ignotus)
Synonyms and other taxonomic changes
Cynips ignota Bassett, 1881
Dryophanta ignota
Life Cycle
Adults emerge in March or April and oviposit in buds (1).
Like a few other Andricus species, forms galls on the undersides of veins of leaves in the white oak group, composed of seedlike cells in groups, covered by wool. Felt (2) describes the galls as "oval, rather thick-shelled, brown leaf vein gall, at first woolly, later naked, length 1/8 inch, diameter 1/16 inch, on swamp white oak [Quercus bicolor]." Krombein et al. (3) also list bur oak (Quercus macrocarpa) as a host. Weld (1) clarifies that the galls drop with the leaves in the fall and the wool weathers away during the winter.
Print References
Original description of gall: Bassett, 1881. Canad. Ent. 13: 106. 9
Works Cited
1.Cynipid Galls of the Eastern United States
Lewis H. Weld. 1959. Privately printed in Ann Arbor, Michigan.
2.Plant Galls and Gall Makers
Ephraim Porter Felt. 1940. Comstock Publishing Company, Inc., Ithaca NY.
3.Catalog of Hymenoptera in America North of Mexico
Karl V. Krombein, Paul D. Hurd, Jr., David R. Smith, and B. D. Burks. 1979. Smithsonian Institution Press.