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different sized front legs

different sized front legs
Photo Information
Copyright: Peter Olsson (melorion) Silver Workshop Editor [C: 0 W: 0 N: 0] (27)
Genre: Animals
Medium: Color
Date Taken: 2012-06-09
Categories: Spiders
Camera: Canon EOS 500D, Canon 18-55 mm EFS
Exposure: f/inf, 1/320 seconds
More Photo Info: [view]
Photo Version: Original Version
Date Submitted: 2012-06-10 5:55
Viewed: 2571
Points: 0
[Note Guidelines] Photographer's Note
misumena vatia, goldenrod crab spider, male

swedish: Blomkrabbspindel

It seems to be something wrong with this male, as his two left front legs are much larger than the right legs. There is also a difference between left/right chelicerae. Never seen something like this before.
Anyone have any idea what may be wrong?

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ThreadThread Starter Messages Updated
To pgmoni: Himelorion 1 06-14 05:43
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  • pgmoni Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 343 W: 100 N: 637] (2769)
  • [2012-06-11 7:23]
  • [+]

This is called Fluctuating Assymetry and seems to be often due to stressful events during growth. See :


Impact of a Catastrophic Natural Disturbance on Fluctuating Asymmetry (FA) in a Wolf Spider

Calibration Check