Andricus quercuspetiolicola

Andricus quercuspetiolicola, also called the oak petiole gall wasp, is a species of oak gall wasp in the family Cynipidae.[1] Galls in which the larvae live and feed are formed along the midrib or petiole of white oak leaves.[1]

Andricus quercuspetiolicola
Galls on bur oak
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Cynipidae
Genus: Andricus
Species:
A. quercuspetiolicola
Binomial name
Andricus quercuspetiolicola
(Bassett, 1863)
Synonyms

Range

This species occurs throughout the eastern half of North America where its host plants grow.[1][2][3][4]

Galls

The oak petiole gall wasp forms galls on white oaks, including Quercus alba, Q. bicolor, Q. montana, Q. macrocarapa, Q. michauxii, Q. prinoides, and Q. stellata.[1][2]

The galls of the sexual generation are round or club-shaped and formed on the petiole or midrib of the leaves in spring, with adults of both sexes emerging from galls in late June and early July.[1][2] The gall is a firm swelling with a scar at the apex and contains several cells, each with a larvae.[1][2] It is initially green but becomes brown and woody as it ages.[1][2][5]

The galls and timing of the agamic generation are unknown.[3]

Parasitoids of the oak petiole gall wasp include the crypt-keeper wasp (Euderus set).[6]

Taxonomy

The adults were first described by Homer Franklin Bassett in 1863 with the name Cynips quercuspetiolicola, though the galls had been previously described by Carl Robert Osten-Sacken.[5] This species is now considered to be in the genus Andricus, and several other names are considered synonyms.[7]

References
  1. Weld, L. Hart. (1959). Cynipid galls of the Eastern United States. Ann Arbor, Mich.
  2. Beutenmuller, William (1892). "Catalogue of gall-producing insects found within fifty miles of New York City, with descriptions of their galls, and of some new species" (PDF). Bulletin of the American Museum of Natural History. 4: 245–278.
  3. Digweed, Scott (2006). "Diversity of gall wasps (Hymenoptera: Cynipidae) on bur oak (Quercus macrocarpa Michx.) in Riding Mountain National Park, MB". Proceedings of the Entomological Society of Alberta. 53.
  4. "Oak Petiole Gall Wasp (Andricus quercuspetiolicola)". iNaturalist. Retrieved December 12, 2020.
  5. Bassett, H.F. (1863). "Descriptions of several supposed new species of Cynips, with remarks on the formation of certain galls". Proceedings of the Entomological Society of Philadelphia. 2: 323–333.
  6. Ward, Anna K. G.; Khodor, Omar S.; Egan, Scott P.; Weinersmith, Kelly L.; Forbes, Andrew A. (2019-09-27). "A keeper of many crypts: a behaviour-manipulating parasite attacks a taxonomically diverse array of oak gall wasp species". Biology Letters. 15 (9): 20190428. doi:10.1098/rsbl.2019.0428. ISSN 1744-9561. PMC 6769138. PMID 31551066.
  7. Poole, Robert W.; Gentili, P. (1996). Hymenoptera, Mecoptera, Megaloptera, Neuroptera, Raphidioptera, Trichoptera. Nomina Insecta Nearctica: A Check List of the Insects of North America. Vol 2 (PDF). Entomological Information Services. ISBN 1-889002-02-X. OCLC 35184098.


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