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Upcoming Events

Photos of insects and people from the 2022 BugGuide gathering in New Mexico, July 20-24

National Moth Week was July 23-31, 2022! See moth submissions.

Photos of insects and people from the Spring 2021 gathering in Louisiana, April 28-May 2

Photos of insects and people from the 2019 gathering in Louisiana, July 25-27

Photos of insects and people from the 2018 gathering in Virginia, July 27-29

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Previous events


Genus Callirhytis

Woolly Catkin Gall Wasp - Callirhytis quercusoperator Sausage Flower Gall Wasp gall - Callirhytis congregata midvein gall on bur oak leaf - Callirhytis flavipes oak? woody gall  - Callirhytis Galls on Red Oak - Callirhytis lanata Wood Sower - Callirhytis seminator Oak Stem Galls - Callirhytis quercusgemmaria Callirhytis quercusventricosa
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Hymenoptera (Ants, Bees, Wasps and Sawflies)
No Taxon ("Parasitica" - Parasitoid Wasps)
Superfamily Cynipoidea
Family Cynipidae (Gall Wasps)
Tribe Cynipini (Oak Gall Wasps)
Genus Callirhytis
Explanation of Names
Author: Förster 1869
Nearctica lists 105 species
Life Cycle
They have a complicated life cycle with agamic and sexual generations and with different galls in different parts of the plant (leaves vs. stems). It may take three years to complete the whole cycle. In most cases very little is known.1
Internet References
"Callirhytis quercusclaviger (Ashmead) and Callirhytis cornigera (Osten Sacken) " from the University of Florida (HTML version or PDF document)