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Comments & ID Thoughts
This is Steatoda triangulosa. It's a placeholder photo I'm using to post: https://entomologytoday.org/2023/03/14/brown-widow-spiders-aggression-black-widow-decline/
This is a study of Theridiidae spiders competing directly against each other including Steatoda triangulosa, Latrodectus geometricus, and Black Widows.
- Submitted by:
- Submitted: Mar 22, 2023
- Photographed: Oct 14, 2023
- Spider: Steatoda triangulosa (Triangulate Cobweb Spider)
- Location: Nashua, New Hampshire, United States
- Spotted Outdoors: Ground layer (leaf litter, dirt, grass, etc)
- Found in web?: No
- Attributes:
Apr 17, 2024
Apr 5, 2024
Topeka, 
https://entomologytoday.org/2023/03/14/brown-widow-spiders-aggression-black-widow-decline/
Yeah I love the Therdiidae family. From my experience Steatoda triangulosa and Steatoda grossa are rarely found together. Also Latrodectus sps are hardly ever found near Steatodas. A large Urban property Outside/Inside multi-level building consisted of all large unmarked Steatoda under the last set of stairs. One section of this building had mainly all Steatoda triangulosas 12+ or so. A concrete wall and sitting area on outside of this building had ONLY Steatoda grossas (hundreds)! And only 1 Black Widow appeared in this area. I never found any Steatodas in the front of building, but did find 3 Latrodectus there,… Read more »