Picture ID 84550

Picture of unidentified spider

Comments & ID Thoughts

Spiny-backed orb weaver With yellow and black markings

  • Submitted by: 
  • Submitted: Sep 11, 2019
  • Photographed: Sep 12, 2019
  • Spider: Unidentified
  • Location: High Point- Guilford County , North Carolina, United States
  • Spotted Outdoors: Low foliage (shrubs, herbs, garden, excluding flowers)
  • Found in web?: Yes
  • Attributes:
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ChrisDraughnTangledWebFormerArachnophobe Recent comment authors
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Great photo! Yes, this is Gasteracantha cancriformis. This photo explains to me why my ventral photos of them at dusk ended up looking like the birth of a galaxy.


Wow, fantastic photo! I have never seen G. cancriformis in these colors!


I was just looking through my photos of them. They really vary ventrally depending on the light. I suspect that the markings are visible under UV light. Nocturnal insects that can see UV wouldn’t see the spider, just the dots. In regular sunlight in the woods the ventral side just looked like a black piece of debris, like a tree seed. At dusk, with flash, they glow white, yellow, and red. I just posted a photo that shows some of the glowing appearance. This photo is a different aspect than either. The ventral surface is dark blue!