6780764493_d626171c03 6780764767_58f00b78f9_s
Photo © Ken-ichi Ueda, some rights reserved
Mount Diablo State Park, Contra Costa County, CA, USA (Google, OSM)
37.910633, -121.923734
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Description

So imagine a very small wasp lands on your arm and, unbeknownst to you, inserts its ovipositor beneath your skin and inserts a few tiny eggs. The eggs release chemicals that command your body to grow a huge, pustulate turnip on your arm, within which the eggs hatch into little maggots, which in turn replicate asexually for a few generations until some of them turn into adult wasps, at which point they bore out of your arm turnip and fly away.

Aren't you happy you're not an oak tree?

I believe this was growing on Quercus berberidifolia, but it was also at the Donner cabin site, so it could be some weird cultivar.

galls, oak galls
Jan. 29, 2012 03:34:13 -0500
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Comments & Identifications

1-thumb
beaked twig gall wasp - Photo (c) randomtruth, some rights reserved (CC BY-NC-SA)
kueda's ID: beaked twig gall wasp (Disholcaspis plumbella)
Posted by kueda over 2 years ago (Flag)
549-thumb
beaked twig gall wasp - Photo (c) randomtruth, some rights reserved (CC BY-NC-SA)
bob-dodge's ID: beaked twig gall wasp (Disholcaspis plumbella)
Posted by bob-dodge over 2 years ago (Flag)
549-thumb

You might also watch for Clasping-twig gall wasp that I see mainly on Q.durata also. Small, button shaped disks clasping the twig mainly at the end. May be reddish in color and if still active, attended by ants that collect the honeydew produced by the gall.

Posted by bob-dodge over 2 years ago (Flag)
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Identification Summary

beaked twig gall wasp - Photo (c) randomtruth, some rights reserved (CC BY-NC-SA)
kueda's ID: beaked twig gall wasp (Disholcaspis plumbella)
beaked twig gall wasp - Photo (c) randomtruth, some rights reserved (CC BY-NC-SA)
bob-dodge's ID: beaked twig gall wasp (Disholcaspis plumbella)
kueda has chosen to retain control over the taxa associated with their observations
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Data Quality Assessment

Community-supported ID? Yes
1 person agrees
0 people disagree
Date? Yes
Georeferenced? Yes
Photos or sounds? Yes
Is the organism wild/naturalized? Unknown
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Does the location seem accurate? Unknown
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Does the date seem accurate? Unknown
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Observation © Ken-ichi Ueda
Cc-by_small some rights reserved

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