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Beaked Spindle Gall Wasp (Heteroecus pacificus)

The beaked spindle gall wasp (Heteroecus pacificus) is known for the long, slender, and slightly curved galls it induces on huckleberry and canyon live oaks. However, it is not uncommon for gall development to be influenced by inquilines or parasites; in those cases, the galls turn out to be rather squat in appearance.


Beaked spindle gall wasp (Heteroecus pacificus), summer-generation gall on canyon live oak. The squat stature of this gall indicates that it was likely influenced by an inquiline or parasite. Chaw'se Indian Grinding Rock SHP, Amador County, California, USA.
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Beaked spindle gall wasp (Heteroecus pacificus), summer-generation gall on canyon live oak. Chaw'se Indian Grinding Rock SHP, Amador County, California, USA.
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Next Gall: Mushroom gall wasp (Heteroecus sanctaeclarae)



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All images copyright Timothy Boomer. All rights reserved worldwide.