Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
 

Register · Log In
HomeGuideID RequestRecentFrassForumsDonateHelp
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Calendar
Upcoming Events

Registration is open for the 2024 BugGuide gathering in Idaho July 24-27

Moth submissions from National Moth Week 2023

Photos of insects and people from the 2022 BugGuide gathering in New Mexico, July 20-24

Photos of insects and people from the Spring 2021 gathering in Louisiana, April 28-May 2

Photos of insects and people from the 2019 gathering in Louisiana, July 25-27

Photos of insects and people from the 2018 gathering in Virginia, July 27-29


Previous events
TaxonomyBrowseInfoImagesLinksBooksData
Home » Guide » Arthropods (Arthropoda) » Chelicerates (Chelicerata) » Arachnids (Arachnida) » Spiders (Araneae) » True Spiders (Araneomorphae) » Entelegynae » Cobweb Spiders (Theridiidae) » Cryptachaea » Cryptachaea rupicola
Photo#463694
spider - Cryptachaea rupicola - male
Copyright © 2010 tom murray

spider - Cryptachaea rupicola - Male
Groton, Middlesex County, Massachusetts, USA
October 10, 2010
Size: 2mm
This spider was on the underside of a board covering leaf litter. It has an interesting little projection on it's back end.
tag · login or register to post comments
Contributed by tom murray on 10 October, 2010 - 9:07pm
Last updated 16 July, 2011 - 1:04pm

Moved
Moved from Cobweb Spiders. I agree with Kevin. Everything matches the description in Howell & Jenkins.
… Lynette Elliott, 16 July, 2011 - 10:57am login or register to post comments

 
Cryptachaea rupicola
Thanks Lynette. It's another new one!
… tom murray, 16 July, 2011 - 11:09am login or register to post comments

...
I'll try to get a profile shot. It's a very active spider, never staying in one place. Now I remember why spiders aren't my favorite to photograph:-)
I'll feed him and hopefully he'll molt into full maturity.
… tom murray, 11 October, 2010 - 7:31am login or register to post comments

 
The refridgerator will slow h
The refridgerator will slow him down a bit. And many spiders will settle down after a while (when in a porcelain bowel, for example) or at least stop for brief pauses.
… Kevin Pfeiffer, 11 October, 2010 - 8:07am login or register to post comments

Moved
Moved from Spiders.
… tom murray, 11 October, 2010 - 7:31am login or register to post comments

Yes, I agree -- perhaps Achaearanea rupicola (Emerton, 1882)
Yes, I agree -- a theridiid of some kind. Can you also get a profile view? Is it just the one posterior medial hump? I suspect that it's still penultimate -- the pedipalps are large enough, but they look too smooth or "plastic" to me. (Although not so sure -- the size seems good.)

Could well be Achaearanea rupicola. Levi (1955a), citing Archer and Kaston, writes that the species "makes a large irregular web under boards, loose slabs, or ledges. The web may contain sand grains or debris." He also mentions that the museum has cotypes from eastern Mass. and Haven, Conn.
… Kevin Pfeiffer, 11 October, 2010 - 1:12am login or register to post comments

Not an ID
A little like the one in Cryptachaea, so maybe Theridiidae.
… John R. Maxwell, 10 October, 2010 - 11:33pm login or register to post comments

Comment viewing options
Select your preferred way to display the comments and click 'Save settings' to activate your changes.

Disclaimer: Dedicated naturalists volunteer their time and resources here to provide this service. We strive to provide accurate information, but we are mostly just amateurs attempting to make sense of a diverse natural world. If you need expert professional advice, contact your local extension office.

Contributors own the copyright to and are solely responsible for contributed content.
Click the contributor's name for licensing and usage information.
Everything else copyright © 2003-2024 Iowa State University, unless otherwise noted.

Bugguide is hosted by:

Plant Pathology, Entomology and Microbiology at Iowa State University logo

Printer Friendly Version 		Terms of Use
Privacy Statement
Site Map
Contact