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Photo#132069
Spider with spikes - Micrathena gracilis - female

Spider with spikes - Micrathena gracilis - Female
Ames, Story County, Iowa, USA
July 29, 2007
In a beech/maple grove. Inis Grove Park. Micrathena gracilis?

Images of this individual: tag all
Spider with spikes - Micrathena gracilis - female Spider with spikes - Micrathena gracilis

Yes
that is it.
The 5 pairs of 'spines' is a good way to distinguish from M. mitrata, which I believe is also in your area.

Also an adult female.

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