Anna K.G. Ward,
Robert W. Busbee,
Rachel A. Chen,
Charles K. Davis,
Amanda L. Driscoe,
Scott P. Egan,
Bailey A.R. Goldberg,
Glen Ray Hood,
Dylan G. Jones,
Adam J. Kranz,
Shannon A. Meadely-Dunphy,
Alyson K. Milks,
James R. Ott,
Kirsten M. Prior,
Sofia I. Sheikh,
Shih-An Shzu,
Kelly L. Weinersmith,
Linyi Zhang,
Y. Miles Zhang,
Andrew A. Forbes*
Anna K.G. Ward
Department of Biology, University of Iowa, Iowa City, IA 52245, USA.
Robert W. Busbee
Department of Biology, Texas State University, San Marcos, TX 78666, USA.
Rachel A. Chen
Biological Sciences, Binghamton University, Binghamton, NY 13902, USA.
Charles K. Davis
Department of BioSciences, Rice University, Houston, Texas 77005, USA.
Amanda L. Driscoe
Department of Biology, Texas State University, San Marcos, TX 78666, USA.
Scott P. Egan
Department of BioSciences, Rice University, Houston, Texas 77005, USA.
Bailey A.R. Goldberg
Department of Biology, University of Iowa, Iowa City, IA 52245, USA.
Glen Ray Hood
Department of Biological Science, Wayne State University, Detroit, MI 48202, USA.
Dylan G. Jones
Biological Sciences, Binghamton University, Binghamton, NY 13902, USA.
Adam J. Kranz
Gallformers.org.
Shannon A. Meadely-Dunphy
Department of Biology, McGill University, Montreal, Quebec H3A 0G4, Canada.
Alyson K. Milks
Biological Sciences, Binghamton University, Binghamton, NY 13902, USA.
James R. Ott
Department of Biology, Texas State University, San Marcos, TX 78666, USA.
Kirsten M. Prior
Biological Sciences, Binghamton University, Binghamton, NY 13902, USA.
Sofia I. Sheikh
Department of Biology, University of Iowa, Iowa City, IA 52245, USA.
Shih-An Shzu
Department of BioSciences, Rice University, Houston, Texas 77005, USA.
Kelly L. Weinersmith
Department of BioSciences, Rice University, Houston, Texas 77005, USA.
Linyi Zhang
Department of BioSciences, Rice University, Houston, Texas 77005, USA.
Y. Miles Zhang
Systematic Entomology Laboratory, USDA-ARS, c/o National Museum of Natural History, Washington, D.C. 20560, USA.
Andrew A. Forbes
Department of Biology, University of Iowa, Iowa City, IA 52245, USA.
Communicated by Jen-Pan Huang
The identities of most arthropod associates of cynipid-induced oak galls in the western Palearctic are generally known. However, a comprehensive accounting of associates has been performed for only a small number of the galls induced by the estimated 700 species of cynipid gall wasps in the Nearctic. This gap in knowledge stymies many potential studies of diversity, coevolution, and community ecology, for which oak gall systems are otherwise ideal models. We report rearing records of insects and other arthropods from more than 527,306 individual galls representing 201 different oak gall types collected from 32 oak tree species in North America. Of the 201 gall types collected, 155 produced one or more arthropods. A total of 151,075 arthropods were found in association with these 155 gall types, and of these 61,044 (40.4%) were gall wasps while 90,031 (59.6%) were other arthropods. We identified all arthropods to superfamily, family, or, where possible, to genus. We provide raw numbers and summaries of collections, alongside notes on natural history, ecology, and previously published associations for each taxon. For eight common gall-associated genera (Synergus, Ceroptres, Euceroptres, Ormyrus, Torymus, Eurytoma, Sycophila, and Euderus), we also connect rearing records to gall wasp phylogeny, geography, and ecology - including host tree and gall location (host organ), and their co-occurrence with other insect genera. Though the diversity of gall wasps and the large size of these communities is such that many Nearctic oak gall-associated insects still remain undescribed, this large collection and identification effort should facilitate the testing of new and varied ecological and evolutionary hypotheses in Nearctic oak galls.
