Andricus pattersonae

Andricus pattersonae, also known as the plate gall wasp, is a species of gall-forming wasp in the genus Andricus.[1] Their hosts are among the white oaks grouping of oaks, with blue oak being common.[2][3]

Andricus pattersonae
Two leaves on a tree, the undersides covered with overlapping yellow and green Andricus pattersonae galls
Multiple galls formed by Andricus pattersonae on oak leaves
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Cynipidae
Genus: Andricus
Species:
A. pattersonae
Binomial name
Andricus pattersonae
Fullaway, 1911
Synonyms

Liodora pattersonae

Like most oak gall wasps, the plate gall wasp has two alternating generations a year: a parthenogenic all-female generation, and a bisexual generation.[2] The all-female generation produces galls in summer that are flat and circular with scalloped edges. Attached to the underside of leaves, these galls are initially green, then yellow, and fade to brown.[3][2] They are 7-9 mm in diameter and have a single larval chamber. Adults emerge in spring. The bisexual generation's galls are pear-shaped and much smaller.[2]

References
  1. "Species Andricus pattersonae - Plate Gall Wasp". bugguide.net. Retrieved 2022-10-08.
  2. Russo, Ronald A. (2021). Plant galls of the Western United States. Princeton, New Jersey: Princeton University Press. pp. 290–291. ISBN 978-0-691-21340-8. OCLC 1239984577.
  3. McCracken, Mary Isabel; Egbert, Dorothy Barnes (1922). California Gall-making Cynipidae: With Descriptions of New Species. Stanford University Press. pp. 26–27.


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