Kokkocynips rileyi

Kokkocynips rileyi · Order: Hymenoptera · Family: Cynipidae

No source yet on danger. We have no source yet on whether it bites, stings or damages anything.
Kokkocynips rileyi
Photo: Christine Young, CC BY

Kokkocynips rileyi has a gall body and a kapello as its two main structures. The species was formerly placed in the genus Dryocosmus before being moved to Kokkocynips.

Source: Wikipedia

How to recognize it

The insect shows two distinct parts: a gall body and a kapello.

Source: Wikipedia

Where it comes from

It was previously classified under Dryocosmus but has been reclassified into the genus Kokkocynips.

Source: Wikipedia

Where it is found in the US

Recorded in 32 of 51 states and DC. Most records: New York, Massachusetts, Virginia, Ohio, Pennsylvania, Texas, Maryland, Illinois.

Darker = more records. Counts are museum and citizen-science records, not population size.

Source: GBIF

Months it is reported in the US

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Source: GBIF

More photos

Kokkocynips rileyi photo 3
Photo: Emily Summerbell, CC BY
Kokkocynips rileyi photo 4
Photo: unknown, CC0
Kokkocynips rileyi photo 5
Photo: Jeff Clark, CC BY
Kokkocynips rileyi photo 6
Photo: Zihao Wang, CC BY

Same family (Cynipidae)

Mossy Rose Gall WaspMossy Rose Gall WaspDiplolepis rosaeHarmlessCalifornia Gall WaspCalifornia Gall WaspAndricus quercuscalifornicusCommon Spangle Gall WaspCommon Spangle Gall WaspNeuroterus quercusbaccarumCherry Gall WaspCherry Gall WaspCynips quercusfoliiWool Sower Gall WaspWool Sower Gall WaspCallirhytis seminatorOak Marble Gall WaspOak Marble Gall WaspAndricus kollariHarmless

Sources

  • Wikipedia: https://en.wikipedia.org/wiki/Dryocosmus_rileyi

Look it up elsewhere: GBIF · iNaturalist · BugGuide · Wikipedia

Text written 2026-10-23 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-22.

How this page works

This is one bug's fact sheet. The colored box at the top says whether it is dangerous. Sections below cover how to recognize it, whether it is a pest, and how to deal with it. The US map shows which states have records; tap a state to see other bugs there.

Every fact on Bug FAQ comes from a named source (university extension sites, government agencies, GBIF, iNaturalist, Wikipedia). The source is linked next to each section. If we have no source for something, we leave it out.