Atrusca trimaculosa (agamic)

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Family: Cynipidae (Wasp) | Genus: Atrusca

Detachable: Detachable
Color: brown, orange
Texture: hairy
Abundance: common
Shape: globular
Season: Summer, Fall
Alignment:
Walls:
Location: lower leaf, leaf midrib, on leaf veins
Form:
Cells:
Possible Range:
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Common Name(s): Woollybear Gall Wasp, Woolly Bear Gall Wasp

Synonymy (3)

Name Type Notes
Sphaeroteras trimaculosum (agamic) scientific Previous name
Atrusca trimaculosa scientific
Callirhytis trimaculosa scientific
Gall image
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On Quercus douglasii

Image by Cricket Raspet © CC-BY

Image Details

Gall image
Source:
License: CC-BY
Attribution:
Creator: Cricket Raspet
Uploader: adamjameskranz
Last Modified: nancyasquith
Caption: On Quercus douglasii
Gall image
Image by Cricket Raspet © CC-BY
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Further Information (4)

California Gall-making Cynipidae: With Descriptions of New Species - Mary Isabel McCracken, Dorothy Barnes Egbert (1922) [Link]

License: Public Domain / CC0

License: Public Domain / CC0

License: All Rights Reserved

License: All Rights Reserved


See Also:
Created Feb 4, 2026 1:47 PM UTC Last updated Feb 4, 2026 1:47 PM UTC