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Spider Photos - Steatoda or Steadota

There seems to be some question as to which version - Steadota or Steatoda is correct. I have found it both ways so will make mention here of this anomaly so that my viewers are aware that they may see it either way. Spiders of the genus Steadota/Steatoda belong to the spider family Theridiidae, or the cobweb weavers. Also known as Combfooted Spiders, this family includes a number of well known arachnids, including the American house spider, Achaearanea tepidariorum, and the redback and widow spiders, Latrodectus spp.. Steatoda spiders are found throughout the world, in both temperate and tropical climates. They are small to moderately small (3-9 mm) spiders with oval abdomens; they may be reddish, brownish or black, with most species exhibiting a white band at the front of the dorsal abdomen which may resemble a collar. These spiders construct a strong, irregular web, somewhat resembling the webs of widow spiders; this web is very sticky, making it a highly effective snare for hobo spiders which they are very good at catching. Steadota/Steatoda grossa, the false black widow spider  is the most well known of the Steadota/Steatoda spiders. Found in cosmopolitan areas around the world, and on both coasts of the United States, grossa is a larger (9 mm) Steadota/Steatoda which, as its common name suggests, may resemble a black widow spider (with no hourglass). Specimens can be reddish to purplish brown in colour, with pale yellow markings on the dorsal abdomen, but many specimens are so dark that these pale markings cannot be distinguished. Steadota/Steatoda grossa is a common and well known "house spider" in many areas, constructing its webs in and around buildings, rock walls, and other structures. It has long been known that the "false black widow" will ensnare, kill and prey upon actual black widow spiders in its natural habitat. The bite of the common comb footed spider causes mild local pain unlike the redback/widow spiders whose bites should be treated immediately with antivenom, especially in a young child.
Info  - www.hobospider.org.
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STEATODA
(Steatoda nobilis)(
Steatoda Paykulliana) (Steatoda grossa) (Steatoda triangulosa)(Steatoda borealis)

The false widow spiders belong to the genus, or group, called Steatoda . There are six species of Steatoda found in the UK including one introduced species, Steatoda nobilis. This group of spiders get their name because they look similar to the true black widow group of spiders, genus Latrodectus. However Steatoda are significantly less harmful to humans. Steatoda are shaped similarly to widow spiders, with round, bulbous abdomens. However, not all Steatoda species resemble widows many have distinct coloring, and are significantly smaller than Latrodectus specimens. Some species of Steatoda actually will prey on widows, as well as other spiders which are considered hazardous to humans. In common with other members of the Theridiidae family, the Steatoda spiders construct a cobweb, i.e., an irregular tangle of sticky silken fibres. As with other web-weavers, these spiders have very poor eyesight and depend mostly on vibrations reaching them through their webs to orient themselves to prey or warn them of larger animals that could injure or kill them. They are not aggressive, and most injuries to humans are due to defensive bites delivered when a spider gets unintentionally squeezed or pinched somehow. It is possible that some bites may result when a spider mistakes a finger thrust into its web for its normal prey, but ordinarily intrusion by any large creature will cause these spiders to flee.  Some members of this genus do have bites which are medically significant in humans (such as S. grossa and S. nobilis), however bites by Steatoda species generally do not have any long-lasting effects.

S. nobilis is native to the Canary Islands but arrived in England in around 1870 through bananas sent to Torquay. In England it has a reputation as one of the few local spider species which is capable of inflicting a painful bite to humans - although this is a comparatively rare occurrence.

Steatoda Grossa - UK Steatoda Grossa - USA Steatoda Grossa - Other
Steatoda triangulosa Steatoda nobilis  Steatoda Paykulliana
Steatoda bipunctata Other Steatoda

 

Steadota  bipunctata
Rabbit Hutch Spider

17 July, 2014:
Found this guy in my hammock. Definitely wasn't about to get too close. Some specific info that might help: Indianapolis IN Found May 18th 2014 About the size of a nickel Any other info that would be helpful in identifying this species? Thanks Josh
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19 October, 2013:
In the UK can you please I'd this spider.
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Reply: This looks like Steatoda bipunctata - glen

21 January, 2012:
Hi there, I found this spider in my bathroom and was just curious as to what he was. Thanks a lot for the help Rick

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Reply: This looks like Steatoda bipunctata - glen

19 May, 2011:
Wow, I actually forgot to add the pic huh? lol Well I guess thats what comes from working 7 days a week right now. lol Here is the pic.... Ken

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Reply: I agree it does look like Steatoda bipunctata - glen

24 September, 2010:
Hi Glen I have still been looking for that spider myself and I might have found it. I think it is the Rabbit Hutch Spider, or Steatoda bipunctata. Not all of the pictures look like it but there are some that do. Now my problem is finding more info on it (if thats what it is). Bite info if dangerous at all, etc... Do you think I found the right name? Any info on the spider you might have? Are they common in America, especially Michigan? Well, I do appreciate any help you can give. THanks :o) Ken
24 September, 2010:

Hi Glen With the summer coming to a close, I have not been seeing too many spiders lately here in Michigan. Tonight however, I found this spider and I dont know what kind it is. I was looking at your spider photos in hopes of finding it but I didnt see it. Any chance you might have an idea what kind it is? I spent about an hour taking pictures of it and between not having the best camera in the world, not have great lightning aand it not staying still half the time, these are the best I could get. To give you a better idea of the size, the dixie cup he is on is just a small bathroom size dixie cup. I believe they are 3 oz cups. Ken

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Reply: This is probably steatoda bipunctata  - glen

16 September, 2011:
Hey, saw this spider some time ago, and took some pictures, any idea what type it is? Was quite pretty.

 

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