Unidentified spider - Dolomedes tenebrosus

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Home » Guide » Arthropods (Arthropoda) » Chelicerates (Chelicerata) » Arachnids (Arachnida) » Spiders (Araneae) » True Spiders (Araneomorphae) » Entelegynae » Nursery Web Spiders (Pisauridae) » Fishing Spiders (Dolomedes) » tenebrosus group (Dolomedes tenebrosus group) » Dolomedes tenebrosus

Photo#1111061

Copyright © 2015 Ed Harrison

Unidentified spider - Dolomedes tenebrosus -

Adirondack Mts., northern Saratoga County, New York, USA
July 27, 2015
Size: 3 inches including legs

At 12:50 p.m. on 6/27 (temp ~80 F), I took the first two photos of this spider carrying a parcel. The 1” wide, green-vinyl strip that she is clinging to indicates her large size. Though she was in the shade at the time, the sun eventually came around and she disappeared.

By 9:00 a.m. 6/28 (temp hi 70s F), she had reappeared on an upright post about 9’-10’ from where she was the day before (3rd photo). Her parcel had been deposited about a foot away from her on the same post, and scores of offspring had emerged (4th photo).

What species is she?

Images of this individual: tag all

Unidentified spider - Dolomedes tenebrosus - female

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Contributed by Ed Harrison on 28 July, 2015 - 1:23pm
Last updated 29 July, 2015 - 9:51am

Moved

Moved from ID Request.

… Lynette Elliott, 29 July, 2015 - 9:51am

This beautiful spider is a Dolomedes tenebrosus, Ed.

It's a fishing spider in the family Pisauridae.

… Zack Saavedra, 29 July, 2015 - 3:53am

Thanks for the ID.

Any idea on how long it would have taken her to grow this large?

… Ed Harrison, 29 July, 2015 - 1:54pm

No idea

I couldn't tell you, though the fact that she has an egg sac means she is quite mature. A wild guess is probably one year.

… Zack Saavedra, 29 July, 2015 - 4:23pm

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