- <ref name="Dankowicz">{{cite web |title=Common Pipizini, Paragini, and Bacchini Species of the Southwestern U.S. (CA NV AZ UT NM CO) |first=Even |last=Dankowicz |website=The Fly Guide: Field/Photo ID for Flies |year=2023 |url=https://docs.google.com/presentation/d/19F1qRGpmNDgaGE13M2SMUBlI846JicTOYjIescjVTHw/preview?slide=id.g876565bf92_0_0 |pages=9–10 |access-date=2024-03-27}}</ref>
Most species cannot be identified without looking at microscopic features.
- <ref name="LAbugs-2015">{{Cite book |last=Hogue |first=Charles L. |title=Insects of the Los Angeles Basin |last2=Hogue |first2=James N. |publisher=[[Natural History Museum of Los Angeles]] County |year=2015 |isbn=978-0938644-44-6 |oclc=910654655 |lccn=93084264 |edition=3rd |pages= |location=Los Angeles |language=en-us }}</ref>
- <ref name="treesearch-2006">{{cite report |title=''A Field Guide to Insects and Diseases of California Oaks'' |last1=Swiecki |first1=Tedmund J. |last2=Bernhardt |first2=Elizabeth A. |date=2006 |publisher=U.S. Forest Service Treesearch Department |doi=10.2737/PSW-GTR-197 |location=Albany, California |pages=20–23 |department=Pacific Southwest Research Station |series=Gen. Tech Rep. PSW-GTR-197}} {{PD-inline}}</ref>
- <ref name="Russo 2006">{{Cite book |last=Russo |first=Ron |title=Field Guide to Plant Galls of California and Other Western States |publisher=University of California Press |year=2006 |orig-date=1979 |edition=Rev. |series=California Natural History Guide No. 91 |location=Berkeley, Calif. |page= |isbn=978-0-520-24886-1 |lccn=2006009332 |oclc=65207054 |language=en-us}}</ref>
- <ref name="Russo 2021">{{Cite book |last=Russo |first=Ronald A. |url=https://www.degruyter.com/document/doi/10.1515/9780691213408/html |title=Plant Galls of the Western United States |publisher=Princeton University Press |year=2021 |isbn=978-0-691-21340-8 |oclc=1239984577 |lccn=2020949502 |pages=105 |language=en-us |doi=10.1515/9780691213408 |s2cid=238148746 }}</ref>
- <ref name="Weld 1926">{{Cite journal |last=Weld |first=Lewis H. |title=Field notes on gall-inhabiting cynipid wasps with descriptions of new species |journal=Proceedings of the United States National Museum | doi=10.5479/si.00963801.68-2611.1 |date=1926 |volume=68 |issue=2611 |publisher=U.S. Government Printing Office |pages=37 |url=https://repository.si.edu/bitstream/handle/10088/15671/USNMP-68_2611_1926.pdf |language=en-us}} {{free access}}</ref>
{{WikiProject Insects|Hymenoptera=yes|Hymenoptera-importance=low|class=stub|importance=low}}