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Home » Guide » Arthropods (Arthropoda) » Chelicerates (Chelicerata) » Arachnids (Arachnida) » Spiders (Araneae) » True Spiders (Araneomorphae) » Synspermiata » Tube Web Spiders (Segestriidae) » Ariadna » Ariadna bicolor
Photo#2041132
Spider - Mimetidae? - Ariadna bicolor
Copyright © 2021 Emily Goetz

Spider - Mimetidae? - Ariadna bicolor
Nassawadox, Northampton County, Virginia, USA
September 6, 2019
Size: 8mm
Collected in pitfall trap in coastal forest. Ventral spines on metatarsi and tibia. 3-clawed (2 pectinate claws)

Images of this individual: tag all
Spider - Mimetidae? - Ariadna bicolor Spider - Mimetidae? - Ariadna bicolor Spider - Mimetidae? - Ariadna bicolor Spider - Mimetidae? - Ariadna bicolor Spider - Mimetidae? - Ariadna bicolor Spider - Mimetidae? - Ariadna bicolor Spider - Mimetidae? - Ariadna bicolor
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Contributed by Emily Goetz on 20 September, 2021 - 7:38am
Last updated 5 May, 2023 - 10:20pm

Moved
Moved from Spiders.
… Chad Heins, 5 May, 2023 - 10:20pm login or register to post comments

Consider
Ariadna bicolor.

Eye arrangement & palps look reasonably close, at least from what I can make out from your images. Compare to the images of this individual.

There's only one species of Dysderidae in the US (Dysdera crocata) - its eyes are in a much tighter cluster and the pedipalps don't match.
… chuuuuung, 25 September, 2021 - 9:53pm login or register to post comments

 
Thank you!
That looks spot on. I went back and checked, and metatarsi I have the characteristic curve and large spur of A. bicolor. Thanks again for your help!
… Emily Goetz, 26 September, 2021 - 3:45pm login or register to post comments

Moved
Moved from ID Request. Not Mimetidae. Likely Gnaphosidae.
… Chad Heins, 20 September, 2021 - 8:09am login or register to post comments

 
thanks for your reply!
Thanks for your reply! It’s definitely 3-clawed, and the spinnerets are quite small and not spigoted. Is that possible for Gnaphosidae? I looked at it again and took a few more photos that will hopefully help with ID. Most importantly, it is six-eyed (although that is a little hard to tell in the photo) and a haplogyne—sorry I didn't include that before. I added close-up shots of the eye arrangement and palps. In the Ubick key, the most likely seemed like Tetragnathidae (because the chelicerae aren’t fused basally), but I don’t see any Tetragnathids with 6 eyes. I might be missing something obvious.

Any ideas are greatly appreciated! If there are other photo angles that would be helpful, please let me know.

Edited to add: the eye arrangement looks quite a bit like Dysderidae
… Emily Goetz, 24 September, 2021 - 8:44pm login or register to post comments

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